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Sample search results for: auriculo ventricular congenito

 

1

Ventricular torsional relation to ventricular fiber arrangement

  CERN Preprints

Summary: Left ventricular torsion from helically oriented myofibers is a key parameter of cardiac performance. Physicians observing heart motion on echocardiograms, during cardiac catheterization, or in the operating room, are impressed by the twisting or rotary motion of the left ventricle during systole. Conceptually, the heart has been treated as a pressure chamber. The rotary or torsional deformation has been poorly understood by basic scientists and has lacked clinical relevance. The aim of this paper attempts to discuss about this question: Is ventricular twisting related to ventricular fiber arrangement? That is dependent to an assumed model of the left ventricular structure.

Ranjbar, Saeed; Meybodi, Mahmood Emami
2014-01-01

2

UNCORRECTEDPROOF 1 Mapping correlations between ventricular expansion

  Biology and Medicine Websites

Summary: ., Toga, A., Thompson, P., 2008, Automated ventricular mapping with multi-atlas fluid image alignment 23UNCORRECTEDPROOF 1 Mapping correlations between ventricular expansion ^ and CSF amyloid and tau ^ 2 February 2009 Available online xxxx 15 16 17 We aimed to improve on the single-atlas ventricular

Thompson, Paul

3

Asymmetrical Ventricular Enlargement in Parkinson's

  Computer Technologies and Information Sciences Websites

Summary: Asymmetrical Ventricular Enlargement in Parkinson's Disease Xuemei Huang, MD, PhD,1 * Yueh Z. Lee, Chapel Hill, North Carolina, USA; 3 Department of Medicine (Neurology), Pacific Parkinson's Research, Bethesda, Maryland, USA Abstract: Parkinson's disease (PD) typically manifests with asymmetric motor

Utah, University of

4

Right Ventricular Outflow Tract Reconstruction with Bicuspid Valved Polytetrafluoroethylene Conduit

  Engineering Websites

Summary: Right Ventricular Outflow Tract Reconstruction with Bicuspid Valved Polytetrafluoroethylene Conduit available for right ventricular outflow tract (RVOT) reconstruction eventually become stenotic and experience, all conduits available for right ventricular outflow tract (RVOT) reconstruction eventually

Pekkan, Kerem

5

POSTER PRESENTATION Open Access Global circumferential left ventricular strain

  Physics Websites

Summary: in hypertrophic cardiomyopathy: comparison to left ventricular hypertrophy and late gadolinium enhancement Laurent impairment in hypertrophic cardiomyopathy: comparison to left ventricular hypertrophy and late gadolinium

Paris-Sud XI, Université de

6

Miniaturization of a left ventricular assist device

  Texas A&M University - TxSpace

Summary: recovering from cardiovascular surgery or suffering from a myocardial infarction and a failed heart transplant. After successful weaning from ventricular assist, 46'/0 of the patients were discharged. In other comparison studies, the "Bio-Pump" has.... There are two schools of thought regarding blood contact materials. One favors the use of smooth materials developed to remain free of biological deposits. The other favors the use of materials that promote the formation of a biological lining [3]. The first...

Milios, Gregory Scott
1996-01-01

7

Powering a Ventricular Assist Device (VAD) With the

  Materials Science Websites

Summary: INVITED P A P E R Powering a Ventricular Assist Device (VAD) With the Free-Range Resonant. For ventricular assist devices (VADs), wireless power technol- ogy will eliminate the complications and infections caused by the percutaneous wired power connection. Integrating wireless power technology into VADs

Hochberg, Michael

8

RESEARCH ARTICLE Open Access Reduced CSF turnover and decreased ventricular

  Physics Websites

Summary: RESEARCH ARTICLE Open Access Reduced CSF turnover and decreased ventricular Ab42 levels are related subjects had idiopathic normal pressure hydrocephalus (iNPH), and the other 22 chronic hydrocephalus from other origins (oCH). The Ab42 peptide concentration was measured by an ELISA test in 31 ventricular CSF

Paris-Sud XI, Université de

9

Cardiac conduction and resistanceCardiac conduction and resistance to ventricular fibrillation in Siberianto ventricular fibrillation in Siberian

  Biology and Medicine Websites

Summary: Cardiac conduction and resistanceCardiac conduction and resistance to ventricular fibrillation in Siberianto ventricular fibrillation in Siberian hibernatorhibernator CittelusCittelus undulatusundulatus.412.41Purkinje fiberPurkinje fiber 0.630.63Atrial muscleAtrial muscle 0.090.091.231.23Crista terminalis


10

A novel approach for the diagnosis of ventricular tachycardia based on phase space reconstruction of ECG

  CERN Preprints

Summary: Ventricular arrhythmias comprise a group of disorders which manifest clinically in a variety of ways from ventricular premature beats (VPB) and no sustained ventricular tachycardia (in healthy subjects) to sudden cardiac death due to ventricular tachyarrhythmia in patients with and/or without structural heart disease. Ventricular fibrillation (VF) and ventricular tachycardia (VT) are the most common electrical mechanisms for cardiac arrest. Accurate and automatic recognition of these arrhythmias from electrocardiography (ECG) is a crucial task for medical professionals. The purpose of this research is to develop a new index for the differential diagnosis of normal sinus rhythm (SR) and ventricular arrhythmias, based on phase space reconstruction (PSR).

Koulaouzidis, George; Cappiello, Grazia; Mazomenos, Evangelos B; Maharatna, Koushik; Morgan, John
2014-01-01

11

Research Report Corpus callosum morphology and ventricular size in

  Mathematics Websites

Summary: ., Corpus callosum morphology and ventricular size in chromosome 22q11.2 deletion syndrome, Brain Res. (2006, palatal and immune disorders, recent attention has turned to the neurocognitive implications

Nguyen, Danh

12

Surface Registration for Ventricular Morphometry Analysis in Mild Cognitive Impairment

  Mathematics Websites

Summary: in autism with heat kernel smoothing. NeuroImage 25, 1256-1265. [4] Chen, K., et al., 2011. Characterizing. · Permutation test with ventricular volume and surface area measures did not detect significant differences

Wang, Yalin

13

Towards short-term forecasting of ventricular tachyarrhythmias

  MIT - DSpace

Summary: This thesis reports the discovery of spectral patterns in ECG signals that exhibit a temporal behavior correlated with an approaching Ventricular Tachyarrhythmic (VTA) event. A computer experiment is performed where a ...

Santos, Gustavo Sato dos
2006-01-01

14

The formation and function of the brain ventricular system

  MIT - DSpace

Summary: The brain ventricular system is composed of a highly conserved set of cavities that contain cerebrospinal fluid (CSF), a protein-rich fluid essential for brain function. However, little is known about the function of ...

Chang, Jessica T. (Jessica Tzung-Min)
2012-01-01

15

Hippocampal and ventricular changes in Parkinson's disease mild cognitive impairment

  Biology and Medicine Websites

Summary: Hippocampal and ventricular changes in Parkinson's disease mild cognitive impairment Liana), 127 cognitively normal Parkinson's disease (PD; PDCN) and 31 PD-associated mild cognitive impairment Inc. All rights reserved. Keywords: Parkinson disease; Mild cognitive impairment; MCI; Brain atrophy

Thompson, Paul

16

Effects of pacing site on global and regional left ventricular function in the setting of dyssynchronous heart failure

  University of California eScholarship Repository

Summary: cardiac muscle contraction into ventricular pressure-volume relationships. Journal of Applied Physiologycardiac muscle contraction into ventricular pressure-volume relationships. Journal of Applied Physiology

Howard, Elliot Jacob
2011-01-01

17

Re-entrant waves and their elimination in a model of mammalian ventricular tissue?

  Mathematics Websites

Summary: on ventricular tissue and cells| these include the Beeler-Reutermodel 8], the Oxsoft guinea pig ventricular cell use equations of the Oxsoft guinea pig ventricle model 9,10], later referred to as OGPV. These eq

Biktashev, Vadim N.

18

VENTRICULAR FIBRILLATION AND BLOOD CHEMISTRY FROM SINGLE AND MULTIPLE TASERX26 DISCHARGES ON PIGS

  Multidisciplinary Databases and Resources Websites

Summary: VENTRICULAR FIBRILLATION AND BLOOD CHEMISTRY FROM SINGLE AND MULTIPLE TASERX26 DISCHARGES ON PIGS)............................................................................. 17 7.2 Chapter 3 ­ Ventricular fibrillation and blood chemistry after multiple Tasering of pigs

Sheridan, Jennifer

19

The Mathematical Modelling of Inhomogeneities in Ventricular Tissue

  Nonlinear Sciences (arXiv)

Summary: Cardiac arrhythmias such as ventricular tachycardia (VT) or ventricular fibrillation (VF) are the leading cause of death in the industrialised world. There is a growing consensus that these arrhythmias arise because of the formation of spiral waves of electrical activation in cardiac tissue; unbroken spiral waves are associated with VT and broken ones with VF. Several experimental studies have been carried out to determine the effects of inhomogeneities in cardiac tissue on such arrhythmias. We give a brief overview of such experiments, and then an introduction to partial-differential-equation models for ventricular tissue. We show how different types of inhomogeneities can be included in such models, and then discuss various numerical studies, including our own, of the effects of these inhomogeneities on spiral-wave dynamics. The most remarkable qualitative conclusion of our studies is that the spiral-wave dynamics in such systems depends very sensitively on the positions of these inhomogeneities.

T. K. Shajahan; Sitabhra Sinha; Rahul Pandit
2007-03-25

20

A two phase harmonic model for left ventricular function

  CERN Preprints

Summary: A minimal model for mechanical motion of the left ventricle is proposed. The model assumes the left ventricle to be a harmonic oscillator with two distinct phases, simulating the systolic and diastolic phases, at which both the amplitude and the elastic constant of the oscillator are different. Taking into account the pressure within the left ventricle, the model shows qualitative agreement with functional parameters of the left ventricle. The model allows for a natural explanation of heart failure with preserved systolic left ventricular function, also termed diastolic heart failure. Specifically, the rise in left ventricular filling pressures following increased left-ventricular wall stiffness is attributed to a mechanism aimed at preserving heart rate and cardiac output.

Dubi, S; Dubi, Y
2006-01-01

21

A Novel Mathematical/Numerical Formula for Assessing Right Ventricular Torsion Using Echocardiographic Imaging

  CERN Preprints

Summary: Recently, the ventricular torsional parameters have received special attention because of their significant role in the ventricular systolic and diastolic function. Right ventricular (RV) rotational deformation is a sensitive index for RV performance but difficult to measure. Having assumed RV as a conic shape, the present study serves a novel mathematical formula of right ventricular rotation that uses velocity vector imaging (VVI) for quantifying RV.

Ranjbar, Saeed
2015-01-01

22

Elevated Strain and Structural Disarray Occur at the Right Ventricular Apex

  Engineering Websites

Summary: Elevated Strain and Structural Disarray Occur at the Right Ventricular Apex V. HARIHARAN, J. Abstract--The right ventricular apex (RVA) is a potential hot spot for development of cardiac rhythm the hypothesis that the right ventricular apex experiences heterogeneous strain distributions and altered fiber

Konofagou, Elisa E.

23

Cardiac arrest and ventricular arrhythmia in patients taking antipsychotic drugs: cohort study using

  Biology and Medicine Websites

Summary: Papers Cardiac arrest and ventricular arrhythmia in patients taking antipsychotic drugs: cohort To examine the rates of cardiac arrest and ventricular arrhythmia in patients with treated schizophrenia with psoriasis. Main outcome measure Diagnosis of cardiac arrest or ventricular arrhythmia. Results Patients

Hennessy, Sean

24

Multi-Scale Modeling of Calcium Dynamics in Ventricular Myocytes with Realistic Transverse Tubules

  Mathematics Websites

Summary: ForReview Only Multi-Scale Modeling of Calcium Dynamics in Ventricular Myocytes with Realistic, Mathematics TIPS: calcium dynamics, ventricular myocytes, numerical simulation, finite element methods, meshless methods #12;ForReview Only 1 Multi-Scale Modeling of Calcium Dynamics in Ventricular Myocytes

Holst, Michael J.

25

A clinical feasibility study of atrial and ventricular electromechanical wave imaging

  Computer Technologies and Information Sciences Websites

Summary: ) during sinus rhythm, left ventricular pacing, and right ventricular pacing, as well as in patients ¼ left ventricle/ventricular; NYHA ¼ New York Heart Association; RA ¼ right atrium/atrial; RBBB ¼ right in humans. METHODS EWI was perfor`med in patients undergoing CRT and a left bundle branch block (LBBB

Konofagou, Elisa E.

26

Magnetic Design for the PediaFlow Ventricular Assist Device

  Engineering Websites

Summary: : Suspended pump. INTRODUCTION The unmet demand for ventricular assist devices (VADs) specifically designed for infants prompted our group and others to develop a pediatric VAD that satisfies the following design for energy transmis- sion; and 3 minimal blood damage. Figure 1 is an artistic rendering of the proposed VAD

Paden, Brad

27

Numerical analysis of Ca2+ signaling in rat ventricular

  Mathematics Websites

Summary: for prediction and analyses on how the Ca2+ dynamics and cardiac excitation-contraction coupling are regulated-tubule microanatomy and the distribution of membrane Ca2+ flux affect cardiac excitation-contraction coupling we developed a 3-D continuum model of Ca2+ signaling, buffering and diffusion in rat ventricular myocytes

Holst, Michael J.

28

Automated Segmentation of Cerebral Ventricular Compartments Warfield SK, 1

  Computer Technologies and Information Sciences Websites

Summary: Atlases (MEA), defining the spatial probability of tissue classes in the brain. The MEA was derived from with expert knowledge of ventricular substructures. First the MEA of all CSF was extracted. It contains labels from 0 to 80, representing the probability of CSF out of 80 labeled structures from the brain atlas

Pohl, Kilian M.

29

Blood damage measures for ventricular assist device modeling

  Materials Science Websites

Summary: Blood damage measures for ventricular assist device modeling Dhruv Arora1, Marek Behr1 and Matteo challenge that needs to be addressed in the design phase of blood pumps is the elevated level of shear stress, and the hemolysis response of the red blood cells, which depends on both the dose and time

Natelson, Douglas

30

Design and construction of a left ventricular cardiovascular assist device 

  Texas A&M University - TxSpace

Summary: declines as the left ventricular chamber enlarges and the muscle wall thins. Medical treatment of this condition has been primarily pharmacological, while a limited number of patients have been treated by transplantation. Even... transplantation was widely accepted as the most effective therapy for end stage heart disease. Statistics suggest that 10 year survival rates had risen as high as 50 percent. However...

Vedi, Manmeet Singh
2004-11-15

31

Anisotropic Stretch-Induced Hypertrophy in Neonatal Ventricular Myocytes

  Biotechnology Websites

Summary: accumulation or ex- pression of atrial natriuretic factor (ANF), connexin-43 (Cx-43), or N-cadherin (by; microfluidics; neonatal cardiac myocytes; anisotropy INTRODUCTION Neonatal ventricular myocytes cultured forces. However, these factors are not normally controlled in neonatal cardiomyocyte cultures, nor

Bhatia, Sangeeta

32

Towards an Atrio-Ventricular Delay optimization assessed by a computer model for Cardiac Resynchronization Therapy

  Computer Technologies and Information Sciences Websites

Summary: Towards an Atrio-Ventricular Delay optimization assessed by a computer model for Cardiac, the cardiac electrical conduction system and a pacemaker are coupled to generate mitral flow profiles for dierent atrio-ventricular delay (AVD) configurations, in the context of cardiac resynchronization therapy

Boyer, Edmond

33

MULTIVARIATE TENSOR-BASED MORPHOMETRY ON SURFACES: APPLICATION TO MAPPING VENTRICULAR CHANGES IN HIV/AIDS

  Mathematics Websites

Summary: IN HIV/AIDS Yalin Wang1,2 , Jie Zhang 3 , Tony F. Chan2 , Arthur W. Toga1 , Paul M. Thompson1 1 Lab lateral ventricular surface abnormalities associated with HIV/AIDS. We use holomorphic one-forms to obtain brain MRI data, to map the profile of lateral ventricular sur- face abnormalities in HIV/AIDS (11

Wang, Yalin

34

Adrenomedullin Gene Expression Is Developmentally Regulated and Induced by Hypoxia in Rat Ventricular Cardiac Myocytes*

  Biology and Medicine Websites

Summary: . These data demonstrate that the adrenomedullin gene is develop- mentally regulated in ventricular development. Furthermore, Adm mRNA levels in- creased in cultured adult ventricular cardiac myocytes in reAdrenomedullin Gene Expression Is Developmentally Regulated and Induced by Hypoxia in Rat

Wojcik, Edward J.

35

Stresses and Strains in the Left Ventricular Wall Approximated as a Thick Conical Shell

  Mathematics Websites

Summary: in cardiac compliance changes. These compliance changes vary in the young, the old and the diseased heart. Pathological conditions such as ischemic heart disease, ventricular hypertrophy and congestive heart failure distribution. Stress and strain interaction due to the ventricular contraction of the heart tissue results

Bukiet, Bruce

36

100 J. Neurosurg. / Volume 109 / July 2008 HE pathogenesis of ventricular dilation in NPH re-

  Mathematics Websites

Summary: properties of the brain parenchyma could favor or even cause ventricular di- lation at a normal pressure.12 Hakim et al.5 proposed that the brain could be considered as a porous viscoelastic material to be computed using FE analysis.13 So far, several studies have simulated ventricular dilation in 2D brain

Frey, Pascal

37

Totally tubular: the mystery behind function and origin of the brain ventricular system

  Biology and Medicine Websites

Summary: Totally tubular: the mystery behind function and origin of the brain ventricular system Laura Anne School, 240 Longwood Ave, Boston, MA, USA A unique feature of the vertebrate brain is the ventricular by neu- roepithelium. While CSF is critical for both adult brain function and embryonic brain development

Lowery, Laura Anne

38

MULTIVARIATE TENSOR-BASED MORPHOMETRY ON SURFACES: APPLICATION TO MAPPING VENTRICULAR CHANGES IN HIV/AIDS

  Biology and Medicine Websites

Summary: a con- formal parameterization of ventricular geometry, and to reg- ister lateral ventricular surfaces abnormalities. Multivariate Hotelling's T2 statistics on the local Riemannian metric tensors, computed in a log-Euclidean forms and tensor-based morphometry, in the log-Euclidean domain, on the resulting surface tensors. Index

Thompson, Paul

39

Reentrant waves and their elimination in a model of mammalian ventricular tissue ?

  Mathematics Websites

Summary: ]. In this paper we use equations of the Oxsoft guinea pig ventricle model experiments on ventricular tissue and cells --- these include the Beeler­Reuter model [8], the Oxsoft guinea pig ventricular cell model specified in Noble et al.[9,10], the Nordin [11] model and the phase 2 Luo

Biktashev, Vadim N.

40

THE FUNCTIONAL ROLES OF THE LATERAL PYLORIC AND VENTRICULAR DILATOR NEURONS IN THE PYLORIC NETWORK OF THE LOBSTER,

  Biology and Medicine Websites

Summary: THE FUNCTIONAL ROLES OF THE LATERAL PYLORIC AND VENTRICULAR DILATOR NEURONS IN THE PYLORIC NETWORK AND VENTRICULAR DILATOR NEURONS IN THE PYLORIC NETWORK OF THE LOBSTER, Panulirus interruptus. BY ADAM L. WEAVER roles of the Lateral Pyloric and Ventricular Dilator neurons in the pyloric network of the lobster

Weaver, Adam Lee

41

Computational Fluid Dynamics Modeling of Impeller Designs for the HeartQuest Left Ventricular Assist Device

  Engineering Websites

Summary: , significant progress has been made in the development of mechanical ventricular assist devices (VADs currently in human use include the axial flow pumps: MicroMed DeBakey VAD3, HeartMate II,4 and Jarvik 2000

Day, Steven

42

The role of regulatory light chain phosphorylation in left ventricular function

  University of California eScholarship Repository

Summary: embedded in the ventricular wall [5, 6] as well as MRI tagging methods [7] showed patterns of transmural fiber strainstrain in the presence of a physiological activation delay. Methods In the present study, we embedded

Campbell, Stuart Gaylon
2010-01-01

43

Computer simulation of a novel technique for Radio-Frequency Ablation of ventricular arrhythmias

  MIT - DSpace

Summary: Ventricular Tachycardia (VT) is a rapid arrhythmia, most commonly due to reentrant electrical activity in the heart. A common treatment for VT is Radio-Frequency Ablation (RFA), which is minimally invasive, but requires ...

Rosbury, Tamara S
2006-01-01

44

Mechanisms of Ventricular Fibrillation The role of mechano-electrical feedback

  Biology and Medicine Websites

Summary: .1 The Heart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.2 Cardiac Arrhythmias . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.2.1 Mechanisms of Cardiac Arrhythmias . . . . . . . . . . . . . 5 1.2.2 Mechanisms of Ventricular Fibrillation . . . . . . . . . . . . 6 1.2.3 Cardiac Arrhythmias and Mechano-Electrical Feedback

Utrecht, Universiteit

45

A novel means of cardiac catheter guidance for ablation therapy of ventricular tachycardia

  MIT - DSpace

Summary: This work presents a system for identifying the site of origin of ventricular tachycardia (VT) and guiding a catheter to that site in order to deliver radio-frequency (RF) ablation therapy. Myocardial infarction (MI), also ...

Lv, Wener
2014-01-01

46

Impaired Left Ventricular Function in the Presence of Preserved Ejection in Chronic Hypertensive Conscious Pigs.

  Physics Websites

Summary: Impaired Left Ventricular Function in the Presence of Preserved Ejection in Chronic Hypertensive. Considering the left ventricle as a muscular pump, we explored LV function during chronic hypertension function with concomitant isovolumic contraction and relaxation abnormalities during chronic hypertension

Paris-Sud XI, Université de

47

VENTRICULAR MAPS IN 804 SUBJECTS CORRELATE WITH COGNITIVE DECLINE, CSF PATHOLOGY, AND IMMINENT ALZHEIMER'S DISEASE

  Biology and Medicine Websites

Summary: alignment method (MAFIA [1]), to automatically segment parametric 3D surface models of the lateral as multi-atlas fluid image alignment (MAFIA [1]), to create detailed surface-based maps of ventricular

Thompson, Paul

48

The effect of myocardial uptake of epinephrine on ventricular fibrillation threshold 

  Texas A&M University - TxSpace

Summary: THE EPFECT OF MYOCARDIAL UPTAKE OF EPINEPHRINE ON VENTRICULAR FIBRILLATION THRESHOLD A Thesis by TERRY WILLIAM HURST Submitted to the Graduate College of Texas ANM University in partial fulfillment of the requirements for the degree of MASTER... OF SCIENCE May 1986 Major Subject: Veterinary Physiology THE EFFECT OF MYOCARDIAL UPTAKE OF EPINEPHRINE ON VENTRICULAR FIBRILLATION THRESHOLD A Thesis by TERRY WILLIAM HURST Approved as to style and content by: Phili R. Vulliet (Chairman of C mittee...

Hurst, Terry William
1986-01-01

49

Right ventricular ejection fraction from equilibrium and first pass scintigraphic cardiac images 

  Texas A&M University - TxSpace

Summary: RIGHT VENTRICULAR EJECTION FRACTION FROM EQUILIBRIUM AND FIRST PASS SCINTIGRAPHIC CARDIAC IMAGES A Thesis by EIJI NAKAMURA Submitted to the Office of Graduate Studies of Texas Ak;M University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE August 1993 Major Subject: Ylectrical Engineering RIGHT VENTRICULAR EJECTION FRACTION FROM EQUILIBRIUM AND FIRST PASS SCINTIGRAPHIC CARDIAC IMAGES A Thesis by EIJI NAKAMURA Approved as to style and content by: Nasser...

Nakamura, Eiji
1993-01-01

50

Two forms of spiral-wave reentry in an ionic model of ischemic ventricular Aoxiang Xu and Michael R. Guevara

  Biology and Medicine Websites

Summary: of inhomogeneity all make it easier to induce certain cardiac arrhythmias. We consider here the specific example triggers life-threatening cardiac arrhythmias such as ventricular tachycardia and ventricular fibrillation. There is growing evidence that spiral-wave activity underlies these reentrant arrhythmias. We thus investigate

Guevara, Michael R.

51

MAPPING VENTRICULAR CHANGES RELATED TO DEMENTIA AND MILD COGNITIVE IMPAIRMENT IN A LARGE COMMUNITY-BASED COHORT

  Biology and Medicine Websites

Summary: methodological issues have limited the large-scale applicability of previous studies that related ventricular019771, RR021813, AG016570, NIA-R01-20098. them qualitative ventricular size ratings or marks anatomical of overall volume or qualitative measures of atrophy. While overall ventricu- lar volume can be a useful

Thompson, Paul

52

Fractal Correlation Properties of R-R Interval Dynamics and Mortality in Patients With Depressed Left Ventricular

  Physics Websites

Summary: by fractal analysis methods may provide clinically useful information on patients with heart failure than the traditional measures of HR variability among patients with depressed left ventricular function coronary care units that included patients with an acute MI and a left ventricular wall motion index of 1


53

Defibrillation via the Elimination of Spiral Turbulence in a Model for Ventricular Fibrillation

  Nonlinear Sciences (arXiv)

Summary: Ventricular fibrillation, the major reason behind sudden cardiac death, is turbulent cardiac electrical activity in which rapid, irregular disturbances in the spatiotemporal electrical activation of the heart makes it incapable of any concerted pumping action. Methods of controlling ventricular fibrillation include electrical defibrillation as well as injected medication. Electrical defibrillation, though widely used, involves subjecting the whole heart to massive, and often counterproductive, electrical shocks. We propose a defibrillation method that uses a very-low-amplitude shock (of order mV) applied for a brief duration (of order 100 ms) and over a coarse mesh of lines on our model ventricle.

Sitabhra Sinha; Ashwin Pande; Rahul Pandit
2001-04-04

54

Three-dimensional organisation of re-entrant propagation during experimental ventricular brilation

  Mathematics Websites

Summary: of Biomedical Sciences, University of Leeds, Leeds LS2 9JT, UK 4 Department of Pharmacology, SUNY Health Science dimensional excitable media. Optically monitored, simultaneously recorded endo- cardial and epicardial patterns of activation on the ventricular wall not always show spiral waves. Analysis of optically recorded

Biktashev, Vadim N.

55

SURFACE-BASED COMPUTATIONAL ANATOMY TECHNIQUES REVEAL VENTRICULAR AND HIPPOCAMPAL ABNORMALITIES IN ADOLESCENTS

  Biology and Medicine Websites

Summary: IN ADOLESCENTS WITH SCHIZOPHRENIA 1 C.N. Vidal*, 2 J.L. Rapoport, 1 K.M. Hayashi, 1 J.A. Geaga, 1 Y. Sui, 1 T that revealed ventricular and hippocampal shape abnormalities in Childhood-Onset Schizophrenia (COS-up interval, and social background, but not IQ. Scans were normalized by affine transformation to ICBM

Thompson, Paul

56

Design and Transient Computational Fluid Dynamics Study of a Continuous Axial Flow Ventricular Assist Device

  Engineering Websites

Summary: . THROCKMORTON, STEVEN W. DAY,* AND DONALD B. OLSEN A ventricular assist device (VAD), which is a miniaturized. It consists of an inducer, an impeller, and a diffuser. The main design objec- tive of this VAD is to produce are adapted so that the impeller is com- pletely magnetically levitated. The VAD operates under tran- sient

Day, Steven

57

Integrated genomic approaches implicate osteoglycin (Ogn) in the regulation of left ventricular mass

  Chemistry Websites

Summary: ,7, Timothy J Aitman1,10 & Stuart A Cook1,3 Left ventricular mass (LVM) and cardiac gene expression) analyses of the cardiac transcriptome in the rat. Using these methods and in vitro functional assays, we control of cardiac gene expression may be important in regulating LVM. Here, we used an integrated

Cai, Long

58

Estimation of 3D Left Ventricular Deformation from Medical Images Using Biomechanical Models.

  Biology and Medicine Websites

Summary: Abstract Estimation of 3D Left Ventricular Deformation from Medical Images Using Biomechanical of Doctor of Philosophy by Xenophon Papademetris Dissertation Director: James Scott Duncan May 2000 #12;c/sonomicrometers and the processing of the results from these, as well as the postmortem information and regional blood flow

Duncan, James S.

59

Estimation of 3D Left Ventricular Deformation from Medical Images Using Biomechanical Models

  Biology and Medicine Websites

Summary: of Doctor of Philosophy by Xenophon Papademetris Dissertation Director: James Scott Duncan May 2000 #12;Abstract Estimation of 3D Left Ventricular Deformation from Medical Images Using Biomechanical Models, implantation of markers/sonomicrometers and the processing of the results from these, as well as the postmortem

Duncan, James S.

60

Three-Dimensional Activation Mapping in Ventricular Muscle: Interpolation and Approximation of Activation Times

  Engineering Websites

Summary: of the electrical activity of the heart, either on its surface or within the muscle, a technique known as cardiacThree-Dimensional Activation Mapping in Ventricular Muscle: Interpolation and Approximation techniques to cardiac mapping and evaluating their accuracy in estimating activation times at un- measured

MacLeod, Rob S.

61

Dynamic Stresses and Strains in the Left Ventricular Wall based on Large Deformation

  Mathematics Websites

Summary: Dynamic Stresses and Strains in the Left Ventricular Wall based on Large Deformation Theory H. R)­596­6467) Abstract In this paper, elastodynamic large deformation theory is applied to calculate dynamic stresses to be spherical. We examine the influence the inertial term has on stresses, strains, stretch ratios, wall

Bukiet, Bruce

62

ARTICLE IN PRESS Mapping hippocampal and ventricular change in Alzheimer disease

  Biology and Medicine Websites

Summary: SmithKline Pharmaceuticals plc, Addenbrooke's Centre for Clinical Investigation, Addenbrooke's Hospital, Hills Road, CB2 2GG. An anatomical surface modeling approach was combined with surface-based statistics to visualize the region. Hippocampal atrophic rates and ventricular expansion were assessed statistically using surface-based

Thompson, Paul

63

Impact of Acute Pulmonary Embolization on Arterial Stiffening and Right Ventricular Function in Dogs

  Engineering Websites

Summary: ; PAH; Ventricular­vascular hemodynamic coupling; Cardiac Magnetic Resonance Imaging; Pulse pressure-text$watermark-text$watermark-text #12;INTRODUCTION Pulmonary arterial hypertension (PAH) is a devastating disease exhibiting fast progression14 and poor prognosis.20,26 PAH originates from increased resistance to blood flow in the small

Chesler, Naomi C.

64

Towards high-resolution cardiac atlases: ventricular anatomy descriptors for a

  Computer Technologies and Information Sciences Websites

Summary: Towards high-resolution cardiac atlases: ventricular anatomy descriptors for a standardized for cardiac atlases. In this paper we discuss the limitations of current atlas-building models when trying to the stereotactic coordinate system from brain atlases. With this goal, we propose a set of methods to obtain two

Oxford, University of

65

10.1098/rsta.2001.0833 Ventricular brillation: evolution of

  Biology and Medicine Websites

Summary: propagation of this wave causes severe cardiac arrhythmias. The most dangerous of these is ventricular are responsible for this arrhythmia. Several new hypotheses have been put forward recently that deviate that cause this deadly arrhythmia and provide a constructive approach to the development of e¯ cient anti

Utrecht, Universiteit

66

A DYNAMIC PROGRAMMING SOLUTION TO TRACKING AND ELASTICALLY MATCHING LEFT VENTRICULAR WALLS IN CARDIAC CINE MRI

  Computer Technologies and Information Sciences Websites

Summary: A DYNAMIC PROGRAMMING SOLUTION TO TRACKING AND ELASTICALLY MATCHING LEFT VENTRICULAR WALLS match the con- tours of the epicardial walls of the left ventricle (LV) in cardiac phase-resolved 2-D among different sets of cine MRI images. Future extensions include comparisons with contours hand

Tsaftaris, Sotirios

67

Diagnostic accuracy and variability of three semi-quantitative methods for assessing right ventricular systolic function

  Physics Websites

Summary: ventricular systolic function from cardiac MRI in patients with acquired heart disease Jérôme Caudron with acquired heart disease: tricuspid annular plane systolic excursion (TAPSE), RV fractional-shortening (RVFS outcome in both congenital (CHD) [1] and acquired heart disease (AHD), including heart failure [2, 3

Paris-Sud XI, Université de

68

Vocal fold and ventricular fold vibration in period-doubling phonation: Physiological description and aerodynamic

  Computer Technologies and Information Sciences Websites

Summary: and aerodynamic modelinga) Lucie Bailly,b Nathalie Henrich, and Xavier Pelorson Département Parole et Cognition and ventricular areas, the aerodynamic behavior of the laryngeal system is simulated using a simplified physical aerodynamic interaction. Previous experimental in- vestigations dealing with in vitro set

Boyer, Edmond

69

Automated ventricular mapping with multi-atlas fluid image alignment reveals genetic effects in Alzheimer's disease

  Biology and Medicine Websites

Summary: Automated ventricular mapping with multi-atlas fluid image alignment reveals genetic effects, as the number of atlases, N, was increased from 1 to 9. In surface-based statistical maps, we detected more subjects' manually labeled brain MRI scans (atlases). We fluidly registered each atlas and mesh model

Thompson, Paul

70

Progress in Cardiology myosin binding protein C (cMBPC),6 ventricular myosin

  Biology and Medicine Websites

Summary: Progress in Cardiology myosin binding protein C (cMBPC),6 ventricular myosin essential light chain actin, -tropomyosin,4 cardiac troponin T (cTnT),4 cardiac troponin I,5 cardiac From the aCardiology, Kurume, and the dDepartment of Cardiology, Research Institute of Environmen- tal Medicine, Nagoya

Lee, Won-Ha

71

Cardiac Right Ventricular Segmentation via Point Correspondence Kumaradevan Punithakumar, Michelle Noga, and Pierre Boulanger

  Engineering Websites

Summary: important diagnostic, prognostic, and thera- peutic implications in patients with acquired heart disease who such as papillary muscles and heart wall. Further, geometric/photometric models are hard to build from a finite. I. INTRODUCTION Assessment of right ventricular (RV) function is important in the diagnosis

Alberta, University of

72

Differences Between Left and Right Ventricular Chamber Geometry Affect Cardiac Vulnerability to Electric Shocks

  Engineering Websites

Summary: Differences Between Left and Right Ventricular Chamber Geometry Affect Cardiac Vulnerability University (B.R., N.A.T), New Orleans, La; Washington University (L.L., I.R.E.), St. Louis, Mo in PMC 2010 August 23. Published in final edited form as: Circ Res. 2005 July 22; 97(2): 168­175. doi:10


73

Pediatric Mechanical Circulatory Support Thermal Analysis of the PediaFlow Pediatric Ventricular

  Engineering Websites

Summary: devices is crucial in avoiding tissue and blood thermotrauma. Ther- mal models of new Maglev ventricular- vection into blood passing through the pump and conduction through surrounding tissue. Coefficients and blood contacting surfaces are estimated based on maximum temperature rise at respective sur- faces

Paden, Brad

74

ARTICLE IN PRESS 3D mapping of ventricular and corpus callosum abnormalities in

  Biology and Medicine Websites

Summary: computational anatomy techniques, we mapped how AIDS impacts the corpus callosum (CC) and ventricular system, two systems that show prominent changes on MRI. We (1) identified regions with greatest differences differences with measures of immune system deterioration and cognitive decline. Methods: 51 3D brain MRI scans

Thompson, Paul

75

Original Research Article Estimation of right atrial and ventricular hemodynamics by

  Engineering Websites

Summary: alternative to the invasive assessment of coronary artery disease. However, a specific limitation of CTCA estimations of right atrial and right ventricular pressures. METHODS: Medical records of all patients who (TRV). SVC area change with contrast injection at the level of the bifurcation of the pulmonary artery

Mittal, Rajat

76

Hippocampal, Caudate, and Ventricular Changes in Parkinson's Disease with and Without Dementia

  Biology and Medicine Websites

Summary: Hippocampal, Caudate, and Ventricular Changes in Parkinson's Disease with and Without Dementia: Parkinson's disease (PD) has been associated with mild cognitive impairment (PDMCI) and with dementia (PDD and Unified Parkinson's Disease Rating Scale (UPDRS) Part III:motor subscale and Mini- Mental State

Thompson, Paul

77

Validation of a novel catheter guiding method for the ablative therapy of ventricular tachycardia in a phantom model

  MIT - DSpace

Summary: Accurate guidance of an ablation catheter is critical in the RF ablation (RFA) of ventricular tachycardia (VT). With current technologies, it is challenging to rapidly and accurately localize the site of origin of an ...

Hirschman, Gordon B.

78

Terminating ventricular tachycardia by pacing induced dynamical inhomogeneities in the reentry circuit

  Nonlinear Sciences (arXiv)

Summary: Formation of feedback loops of excitation waves (reentrant circuit) around non-conducting ventricular scar tissue is a common cause of lethal cardiac arrhythmias, such as ventricular tachycardia. This is typically treated by rapid stimulation from an implantable device (ICD). However, the mechanisms of reentry termination success and, more importantly, failure, are poorly understood. To study such mechanisms, we simulated pacing of anatomical reentry in an ionic model of cardiac tissue, having significant restitution and dispersion properties. Our results show that rapid pacing causes inhomogeneous conduction in the reentrant circuit, leading to successful pacing termination of tachycardia. The study suggests that more effective pacing algorithms can be designed by taking into account the role of such dynamical inhomogeneities.

Sitabhra Sinha; Johannes Breuer
2004-06-21

79

Spiral Turbulence: From the Oxidation of CO on Pt(110) to Ventricular Fibrillation

  Nonlinear Sciences (arXiv)

Summary: We give a brief overview of systems that show spiral patterns and spatiotemporally chaotic states. We concentrate on two physical systems: (1) the oxidation of CO on Pt(110) and (2) ventricular fibrillation in hearts. The equations that have been suggested as simple models for these two different systems are closely related for they are both {\\it excitable media}. We present these equations and give a short summary of the phenomena they yield.}

Ashwin Pande; Sitabhra Sinha; Rahul Pandit
2000-01-27

80

Three-Dimensional Geometric Modeling of Membrane-bound Organelles in Ventricular Myocytes: Bridging the Gap between

  Computer Technologies and Information Sciences Websites

Summary: the Gap between Microscopic Imaging and Mathematical Simulation Zeyun Yua,g, , Michael J. Holsta microscopic (EM) tomogra- phy and two-photon microscopy (T-PM). Of particular interest in this study are two-C) coupling through dynamic Ca2+ mobilization in cardiomy- ocytes. Key words: Ventricular myocyte; Electron

Texas at Austin, University of

81

Abstract --In this work, an algorithm for the detection of the left ventricular border in two-dimensional long axis

  Biology and Medicine Websites

Summary: -dimensional long axis echocardiographic images is presented. In its preprocessing stage, images fusion was applied to a sequence of images composed of three cardiac cycles. This method exploits the similarity of corresponding. I. INTRODUCTION everal medical image segmentation methods for identification of the left ventricular

Carvalho, João Luiz

82

Abstract--We have recently introduced an algorithm for semi-automatic segmentation of the left ventricular wall in

  Biology and Medicine Websites

Summary: , the algorithm uses temporal averaging for image denoising. Motion estimation is used to detect and reject frames approaches have been used for denoising, such as morphologic filtering [1], the discrete wavelet transform [7 ventricular wall in short-axis echocardiographic images (EMBC 30:218­221). In its preprocessing stage

Carvalho, João Luiz

83

Quantitative analysis of cardiac motion is of great clinical interest in assessing ventricular function. Real-time 3-D

  Biology and Medicine Websites

Summary: ventricular function. Real-time 3-D (RT3D) ultrasound transducers provide valuable three- dimensional in RT3D ultrasound. A myocardial displacement field and dynamic cardiac metrics were computed dataset. 1. INTRODUCTION Ultrasound is the cardiac screening modality with the highest temporal resolution


84

The cardiac renin-angiotensin system is responsible for high salt diet-induced left ventricular hypertrophy in mice

  Physics Websites

Summary: mg/kg/day). After 8 weeks, arterial pressure was similar in all groups and similar to baseline morbidity and mortality. High salt (HS) intake affects not only arterial pressure but also left ventricular hypertrophy; Blood pressure; Renin angiotensin system; Mitogen-activated protein kinases; Mice inserm-00538568

Paris-Sud XI, Université de

85

Prognostic Significance and Normal Values of 2D Strain to Assess Right Ventricular Systolic Function in Chronic Heart Failure

  Physics Websites

Summary: Function in Chronic Heart Failure Short Title: RV dysfunction and prognosis in CHF Soulef Guendouz, MD1 Journal 2012;76(1):127-36" #12;2 ABSTRACT Aims: Chronic heart failure (CHF) has a poor prognosis. Our aims or emergent transplantation or emergent ventricular assist-device implantation or acute heart failure. RV-2D

Paris-Sud XI, Université de

86

Mapping genetic influences on ventricular structure in twins Yi-Yu Chou, Natasha Lepore, Ming-Chang Chiang, Christina Avedis-

  Biology and Medicine Websites

Summary: .1016/j.neuroimage.2008.10.036 Reference: YNIMG 5776 To appear in: NeuroImage Received date: 12 April 2008 influences on ventricular structure in twins, NeuroImage (2008), doi:10.1016/j.neuroimage.2008 PhD2 , Margaret Wright PhD3 , Arthur W. Toga PhD1 , Paul M. Thompson PhD1 1 Laboratory of Neuro

Thompson, Paul

87

TOMM40 rs2075650, TOMM40 rs157580 and TOMM40 PolyT Polymorphism Effects on Ventricular Enlargement in Individuals with and without Mild Cognitive Impairment

  Biology and Medicine Websites

Summary: and the corresponding beta-coefficient maps. #12;:12 0.663 MMSE 28.1 (2.3) 28.3 (1.5) 28.3 (1.5) 0.934 Figure 2. Significance and Correlation maps automated ventricular segmentation technique and the radial distance mapping approach were applied

Thompson, Paul

88

Added Spectral Features in ECGs From Patients With Ventricular Tachycardia Detected by Phase and Group-Delay Analysis Over the Cardiac Cycle

  Biology and Medicine Websites

Summary: that it was expressed relative to three temporal fiducials. Two of the fiducials were the onsets of the P and Q wavesAdded Spectral Features in ECGs From Patients With Ventricular Tachycardia Detected by Phase. Cain Washington University, St. Louis, MO ABSTRACT Fourier analysis of the signal-averaged ECG (SAECG

Arthur, R. Martin

89

Experimental Measures of Ventricular Activation and Synchrony

  Computer Technologies and Information Sciences Websites

Summary: A. and Nora Eccles Harrison Fund for Cardiovascular Research (BBP and RSM); the American Heart (BBP), Guidant Corporation (BBP), and the NIH/NCRR Center for Integrated Biomedical Computing (CIBC, P41-RR12553-07). Address for reprints: Bonnie B. Punske, Ph.D., CVRTI, Univer- sity of Utah, 95 South

Utah, University of

90

Miniaturization of a left ventricular assist device 

  Texas A&M University - TxSpace

Summary: . If this is not the case, the patient is necessarily hospitalized for the entire duration of their use of the device. An essential step, then, in creating a functional artificial ventricle which is to be used as a bridge to transplant or eventually as a permanent...]. Of the estimated 150, 000 patients who die of end-stage heart disease in the U. S. each year, about 15, 000 - 35, 000 may be candidates for circulatory assistance via a transplant or mechanical device [4]. Since even the minimum estimate of 15, 000 candidates far...

Milios, Gregory Scott
1996-01-01

91

Mechanisms of ventricular arrhythmias: From molecular fluctuations to electrical turbulence

  University of California eScholarship Repository

Summary: type of behavior B 1.0 emerges, which exhibits a large-small- Unstable equilibrium n large-small alternating pattern (type of behavior B 1.0 emerges, which exhibits a large-small- Unstable equilibrium n large-small alternating pattern (

Qu, Z; Weiss, JN; Weiss, JN
2015-01-01

92

Phase resetting of spontaneously beating embryonic ventricular heart cell aggregates

  Biology and Medicine Websites

Summary: . GUEVARA, ALVIN SHRIER, AND LEON GLASS Department of Physiology, McGill University, Montreal, QuebecH3G 1 Y- latory activity. In isolated cardiac tissue a single prema- ture stimulus can annihilate spontaneous of apremature stimulus is usually not quite so drastic; generally, there is a "resetting" of the cardiac rhythm

Guevara, Michael R.

93

Estimation of 3D Left Ventricular Deformation from Echocardiography

  Biology and Medicine Websites

Summary: J. Sinusas 2,3 Donald P. Dione 3 and James S. Duncan 1,2 Yale Image Processing and Analysis Group as on the endocardial and epicardial surfaces. However, the analysis of mid-wall myocardial deforma- tion requires velocity imaging [18­21]. While these newer MR approaches offer a comprehensive analysis of regional left

Duncan, James S.

94

On two mechanisms of the domain structure of ventricular fibrillation

  Mathematics Websites

Summary: .V. Holden 1 , S.F. Mironov 3 , A.M. Pertsov 3 and A.V. Zaitsev 3 Submitted to IJBC: 2000/08/11 1 School than the approximate periodicity of the local oscillations [Biktashev, Holden, Mironov, Zaitsev & Pertsov 1999b, Zaitsev, Berenfeld, Jalife, Mironov & Pertsov 2000]. Interpretation of fibrillation as re

Biktashev, Vadim N.

95

ORIGINAL RESEARCH Progressive right ventricular functional and structural

  Biology and Medicine Websites

Summary: .184 Abstract Right ventricle (RV) dysfunction occurs with progression of pulmonary arterial hypertension (PAH, we hypothesize that the recently established mouse model of PAH, via hypoxia and SU5416 treatment (Hy duration of HySu exposure, which would mimic changes in RV function with PAH progression found clinically

Chesler, Naomi C.

96

Numerical Analysis of Ca2+ Signaling in Rat Ventricular

  Mathematics Websites

Summary: of Bioengineering, University of California San Diego, La Jolla, California, United States of America, 2 Department of Computer Science, University of Wisconsin, Milwaukee, Wisconsin, United States of America, 3 Department of Medicine, University of California San Diego, La Jolla, California, United States of America, 4 Department

Holst, Michael J.

97

UNCORRECTEDPROOF 1 Mapping genetic influences on ventricular structure in twins

  Biology and Medicine Websites

Summary: brain MRI databases. We 15 applied our multi- ^ template segmentation approach termed " ^ Multi- ^ Atlas age= ^ 24.6 ( ^ SD=1.7)); and 56 same- ^ sex 18 fraternal (dizygotic, DZ) twins (28 pairs; mean age image databases. 29 © 2008 Elsevier Inc. All rights reserved. 30 31 32 Introduction 33 Imaging genetics

Thompson, Paul

98

CARDIOMYOPATHY Exercise-Induced Left Ventricular Systolic Dysfunction

  Biology and Medicine Websites

Summary: of Iowa, on the basis of their familial relationship to a boy with Duchenne or Becker muscular dystrophy dystrophin, a com- ponent of muscle cytoskeleton, cause muscular dystrophy,1 cardio- myopathy,2 or both

Campbell, Kevin P.

99

Are Nonlinear Ventricular Arrhythmia Characteristics Lost, as Signal Duration Decreases?

  Engineering Websites

Summary: are trained to recognize the four cardiac rhythms studied here. This is based on our previous work in heart approach to two popular methods [6] for heart rhythm classification used in implantable devices ­ a heart, time-frequency distributions, coherence analysis, and heart rate variability. To insure sufficient

Povinelli, Richard J.

100

The Visualization and Measurement of Left Ventricular Deformation

  Computer Technologies and Information Sciences Websites

Summary: @cs.auckland.ac.nz Abstract While medical progress has been made in the diagnosis and treatment of heart diseases it remains and the prognosis after heart failure is poor. An im- proved understanding of cardiac mechanics might advance the diagnosis and treatment of heart diseases. We have developed a toolkit designed for visualizing biomedical

Goodman, James R.

101

Can Tasers directly cause ventricular fibrillation? J G Webster1

  Multidisciplinary Databases and Resources Websites

Summary: dart and the ventricle (dart-to-heart distance) necessary to trigger VF in an in-vivo porcine model represent the dart-to-heart distances found in a human, we reflected the skin, subcutaneous fat and muscle the darts makes no significant difference in the current. We directly measured the dart-to- heart distance

Sheridan, Jennifer

102

Design and construction of a left ventricular cardiovascular assist device

  Texas A&M University - TxSpace

Summary: Congestive heart failure (CHF) is a debilitating condition that afflicts 4.8 million Americans with an increasing incidence. Each year, there are an estimated 400,000 new cases. The incidence is on the rise as the age of the population is increasing...

Vedi, Manmeet Singh
2004-11-15

103

UNIVERSIT DE BOURGOGNE COLE DOCTORALE SPIM

  Physics Websites

Summary: peuvent se produire au niveau atrial (noeud auriculo-ventriculaire, plus tronc du faisceau de HIS avant sa. La stimulation externe peut terminer la fibrillation mais peut aussi éventuellement générer de fibrillation en appliquant une stimulation sous le seuil pour éviter d'engendrer d'autres problèmes. Après

Paris-Sud XI, Université de

104

POSTER PRESENTATION Open Access The 3d left ventricular geometry integrated

  Physics Websites

Summary: systolic pressures (PSP) resulting in MWS. For AVS patients, the echocardiographic trans- aortic valve maximal gradient was added to the tono- metric PSP. Results Ejection fraction was homogeneous between the three subgroups (C1=64±5, C2=66±7, AVS=72±8 %) The signif- icant and gradual elevation in PSP found

Paris-Sud XI, Université de

105

Three-Dimensional Left and Right Ventricular Strain Distributions in The Rat Heart /

  University of California eScholarship Repository

Summary: Fourier Transform and the result is a complex image with magnitude and phase,Fourier transform of the isolated spectral peaks. Each material point has a unique phaseFourier transform of the tagged image (C) Magnitude image after isolating a spectral peak using a band pass filter (D) Phase

Barrio, Martin J.
2013-01-01

106

Multi-Scale Modeling in Rodent Ventricular Myocytes: Contributions of structural and functional heterogeneities to

  Mathematics Websites

Summary: , PFBH 241 University of California San Diego 9500 Gilman Drive, La Jolla, CA 92093-0412 Phone: 858 822 gradient near the cell membrane and a more uniform Ca2+ distribution in the cell interior [1]-[7]. An important reason for this phenomenon might be that in these cells the t-tubular system forms a network

Holst, Michael J.

107

Simultaneous Estimation of Left Ventricular Motion and Material Properties with Maximum a Posteriori Strategy

  Computer Technologies and Information Sciences Websites

Summary: , quanti- tative estimation of cardiac regional functions and mate- rial characteristics has significant physiological and clin- ical values. We have earlier developed a stochastic finite element framework of post mortem myocardium. 1. Introduction 1.1 Cardiac Motion Analysis Acute and chronic myocardial

Shi, Pengcheng

108

Expression and localization of P2 nucleotide receptor subtypes during development of the lateral ventricular

  Biology and Medicine Websites

Summary: . McIntyre1 and N. R. Saunders1,3 1 Department of Pharmacology, University of Melbourne, Parkville VIC environment of the brain, which is vital for its proper development and function (Saunders, 1992). Previous

Burnstock, Geoffrey

109

Fluid--Structure Interaction : : Physiologic Simulation of Pulsatile Ventricular Assist Devices using Isogeometric Analysis

  University of California eScholarship Repository

Summary: Y-shaped baffle for the Fontan surgery at rest and exercise.connection (TCPC), or Fontan Surgery. The goal of this workfontan baffle using computational fluid dynamics. Journal of Thoracic and Cardiovascular Surgery,

Long, Christopher Curtis
2013-01-01

110

POSTER PRESENTATION Open Access Age-related variations in left ventricular diastolic

  Physics Websites

Summary: . Background Recent studies suggest the ability of phase-contrast car- diovascular magnetic resonance (PC are comparable when assessed by DE and PC-CMR. Methods We studied 80 asymptomatic volunteers (50 males, mean age 44.7+/-16.7 years [19-79]) who underwent DE and PC-CMR exams on the same day. Transmitral EDE and ADE

Paris-Sud XI, Université de

111

Molecular remodeling of ion channels, exchangers and pumps in atrial and ventricular myocytes in ischemic cardiomyopathy

  Engineering Websites

Summary: of a narrow catalog of the functionally most important genes regulating ion homeostasis. We focused, the gene crucial for Na+ and K+ homeostasis. Thus, our cell- specific molecular profiling defined new with Ca2+ homeostasis and energy metabolism. However, some of the implicated genes may be secondary to ICM


112

Hippocampal and Ventricular Differences in 804 ADNI subjects mapped with Multivariate Tensor-Based Morphometry

  Mathematics Websites

Summary: -Based Morphometry Yalin Wang, Yang Song, Yi-Yu Chou, Arthur W. Toga, Paul M. Thompson and the Alzheimer's Disease neuroimaging to map the profile of disease effects on the brain and its clinical correlates. In Alzheimer differences in 804 subjects scanned as part of the Alzheimer's Disease Neuroimaging Initiative (ADNI; 184 AD

Wang, Yalin

113

Hyperbolic Ricci Flow and Geodesic Curve Lifting for Consistent Ventricular Surface

  Mathematics Websites

Summary: , Leslie C. Baxter5 , Eric M. Reiman4 , Richard J. Caselli6 , Yalin Wang1 , and for the Alzheimer's Disease impairment (MCI) subjects from the Alzheimer's Disease Neuroimag- ing Initiative (ADNI), including 71 Banner Alzheimer's Institute and Banner Good Samaritan PET Center, AZ, USA 5 Human Brain Imaging

Wang, Yalin

114

Tornado in a dish: Revealing the mechanisms of ventricular arrhythmias in engineered cardiac tissues

  Biology and Medicine Websites

Summary: of the critical mass theory was developed using the concept of wavelength [13], which is the product of the refractory period and the conduction velocity of an impulse. Recently, several groups have challenged


115

Original article Marked differences between atrial and ventricular gene-expression remodeling in

  Biology and Medicine Websites

Summary: in dogs with experimental heart failure Sophie Cardin a,c,1 , Patricia Pelletier a,b,1 , Eric Libby d Available online 30 August 2008 Keywords: Heart failure Arrhythmias Remodeling Gene-expression Metabolism Fibrosis Congestive heart failure (CHF) causes arrhythmogenic, structural and contractile remodeling

Glass, Leon

116

A NEW AUTOMATED TECHNIQUE FOR LEFT-AND RIGHT-VENTRICULAR SEGMENTATION IN MAGNETIC RESONANCE IMAGING

  Biology and Medicine Websites

Summary: , the edge detection is performed and the papillary muscles (PMs) are excluded via a convex-hull method with morphological operations. The algorithm extracts the most precise myocardial and RV contours. Experimental the error between the target and the synthesized image. In segmentation, all aforementioned algorithms have

Konofagou, Elisa E.

117

De novo desmin-mutation N116S is associated with arrhythmogenic right ventricular cardiomyopathy

  Physics Websites

Summary: in the desmosomal candidate genes JUP, DSG2, DSC2, DSP and PKP2 known to be associated with ARVC. In 43 formation, which was supported by transfections in SW13 cells. Thus, the gene coding for desmin appears

Bielefeld, Universität

118

Echocardiographic and scintigraphic methods of left ventricular ejection fraction determination in dogs: a comparative study

  Texas A&M University - TxSpace

Summary: preparation included clipping the hair over the right thoracic wall and cleansing the skin with alcohol to remove dirt particles that might interfere with the echocardiographic examination. ECHOCARDIOGRAPHY The echocardiographic examination was performed...

Steyn, Phillip Franswa
1989-01-01

119

Multisensor Fusion for Atrial and Ventricular Activity Detection in Coronary Care Monitoring

  Computer Technologies and Information Sciences Websites

Summary: task such as arrhythmia detection still produce an important amount of undesirable alarms, due in part-fatal arrhythmias, and to specific therapeutic follow-up. In order to pursue this task, many physiological undertaken by many researchers and groups. Automatic arrhythmia detection has been the subject of extensive

Boyer, Edmond

120

Triggered alternans in an ionic model of ischemic cardiac ventricular muscle

  Biology and Medicine Websites

Summary: attack is often due to a disturbance in the rhythm of the heartbeat ,,``cardiac arrhythmia''.... Arrhythmias arise in this context because of the interruption in the flow of blood to the heart muscle the arrhythmias first start to appear. While there has been much speculation about a cause-and-effect relationship

Guevara, Michael R.

121

Ranking the Clinical and Pathological Correlates of Ventricular Expansion Mapped in 804 Alzheimer's

  Biology and Medicine Websites

Summary: . By using maps of pointwise correlations, we were able to create cumulative distribution function plots MRI scans from 184 AD, 391 MCI, and 229 healthy elderly controls. Radial expansion of the ventricles shape differences and radial expansions were visualized using surface- based statistical maps. P

Thompson, Paul

122

Helical myofiber orientation after myocardial infarction and left ventricular surgical restoration in sheep

  Biology and Medicine Websites

Summary: aneurysm plication (n 8) or sham operations (n 5). Six weeks after this operation, hearts were excised system. Transmural samples of the helix angles were compared at the border zone of the aneurysm or repair. Results: The helical myofiber orientation did not change after myocardial infarction. However, aneurysm

Duncan, James S.

123

Discordant Calcium Transient and Action Potential Alternans in a Canine Left-Ventricular Myocyte

  MIT - DSpace

Summary: Electrocardiographic alternans is known to predispose to increased susceptibility to life threatening arrhythmias and sudden cardiac death. While this decreased level of cardiac electrical stability is often due to the ...

Armoundas, Antonis A.

124

The effect of myocardial uptake of epinephrine on ventricular fibrillation threshold

  Texas A&M University - TxSpace

Summary: the anesthetized rat. The change of EPI concentration in myocardial sympathetic presynaptic nerve terminals was examined using the infusion of EPI at a concentration that elicits a physiological response in a controlled stress model (EPI infusion...), and an immobilization stress model. EPI was initially infused at 1. 6 ug/min and then adjusted to maintain a heart rate (HR) of 1. 5 to 2 times pre-infusion rate for 15, 30, 45, and 60 minutes. At 15 minutes post-infusion, HR and plasma EPI concentration had...

Hurst, Terry William
1986-01-01

125

Carbon Monoxide Pollution Promotes Cardiac Remodeling and Ventricular Arrhythmia in Healthy Rats

  Computer Technologies and Information Sciences Websites

Summary: worldwide by outdoor air pollution caused by vehicles and industrial emissions (http://www.who.int; http:// www.infoforhealth.org). Notably, air pollution increases the risk of mortality from cardiovascular investigating the effects of urban air pollution in humans are mainly restricted to epide- miological studies

Boyer, Edmond

126

Ventricular dyskinesis induced loss of contractile function and epicardial inflammation : role of cellular adhesion molecules

  University of California eScholarship Repository

Summary: instrumentation and bead implantation, but no pacing and served as controls.instrumentation and anesthesia as there is a significant difference between control (control group, recordings took place immediately after instrumentation (

Yamazaki, Katrina Go
2009-01-01

127

Methods for Measuring Right Ventricular Function and Hemodynamic Coupling with the Pulmonary Vasculature

  Engineering Websites

Summary: application of these methods to RV function and coupling changes with pulmonary hypertension. We especially dysfunction, Mechanical efficiency, Metabolic efficiency, Pulmonary circulation, Pulmonary hypertension, such as pulmonary arterial hypertension (PAH) compromise RV function, in particular its ability to increase

Chesler, Naomi C.

128

Basic Res Cardiol . Author manuscript Impaired left ventricular function in the presence of preserved ejection in

  Physics Websites

Summary: of preserved ejection in chronic hypertensive conscious pigs Mario Rienzo 1 2 , Alain Bizé 1 2 , Dionyssis ventricle as a muscular pump, we explored LV function during chronic hypertension independently from with concomitant isovolumic contraction and relaxation abnormalities during chronic hypertension while ejection

Paris-Sud XI, Université de

129

Normal and Hydrocephalic Brain Dynamics: The Role of Reduced Cerebrospinal Fluid Reabsorption in Ventricular Enlargement

  Engineering Websites

Summary: intracranial pressure gra- dients, solid stresses and strains, and fluid velocities through- out the cranio pressure gradients during the transitional phase. The poroelastic simulation thus provides a plausible transmantle pressure gradients. Keywords--Cerebrospinalfluid,Computationalfluiddynamics, Fluid

Linninger, Andreas A.

130

Ultrastructural Localization of Calsequestrin in Adult Rat Atrial and Ventricular Muscle Cells

  Biology and Medicine Websites

Summary: that the sarcoplasmic reticulum is composed of at least three structurally distinct regions (6). These are the network sarcoplasmic reticulum. The network sarcoplasmic re- ticulum is composed of an anastomosing network of sarco connected by junctional processes called feet, whereas the corbular sarcoplasmic reticulum composed

Campbell, Kevin P.

131

Echocardiographic and scintigraphic methods of left ventricular ejection fraction determination in dogs: a comparative study 

  Texas A&M University - TxSpace

Summary: preparation included clipping the hair over the right thoracic wall and cleansing the skin with alcohol to remove dirt particles that might interfere with the echocardiographic examination. ECHOCARDIOGRAPHY The echocardiographic examination was performed...

Steyn, Phillip Franswa
1989-01-01

132

P2X1 receptors are closely associated with connexin 43 in human ventricular myocardium

  Biology and Medicine Websites

Summary: , 60, 95 and 120 kDa in the protein extracts from human left ventricles corresponding to equivalent of patients with dilated cardiomyopathy, although Western blots showed an enhancement of P2X1 receptor protein

Burnstock, Geoffrey

133

Three dimensional aspects of reentry in experimental and numerical models of ventricular

  Mathematics Websites

Summary: the wall. (b,c) Snapshots of surface activity in an optical map­ ping experiment with electrically induced schematically on Fig. 1(a), showing a coupled­map­lattice excitable medium model [Holden, Poole & Tucker 1996 electrical activity of the heart has become possible [Gray, Pertsov & Jalife 1998, Witkowski, Leon, Penkoske

Biktashev, Vadim N.

134

Three dimensional aspects of re-entry in experimental and numerical models of ventricular

  Mathematics Websites

Summary: . (b,c) Snapshots of surface activity in an optical map- ping experiment with electrically induced schematically on Fig. 1(a), showing a coupled-map-lattice excitable medium model Holden, Poole & Tucker 1996 electrical activity of the heart has become possible Gray, Pertsov & Jalife 1998, Witkowski, Leon, Penkoske

Biktashev, Vadim N.

135

Cerebral ventricular changes associated with transitions between normal cognitive function, mild cognitive impairment, and dementia.

  University of California eScholarship Repository

Summary: First Image Age Gender Education Race Infarcts CES-D Score Dementia Progressionfirst and second images, rate of change in these measures between images, and interscan interval are summarized for subjects in each dementia progression


2007-01-01

136

Atlas Generation for Subcortical and Ventricular Structures With Its Applications in Shape Analysis

  MIT - DSpace

Summary: Atlas-driven morphometric analysis has received great attention for studying anatomical shape variation across clinical populations in neuroimaging research as it provides a local coordinate representation for understanding ...

Qiu, Anqi

137

Temporal evolution for the phase histogram of ECG during human ventricular fibrillation

  Physics Websites

Summary: of Tokyo, Tokyo 113-0033, Japan ^Division of Cardiology, Department of Internal Medicine, Fujita Health, is an important issue in cardiology. Yet to date, there exists no effective measure capable of predicting fatal VF


138

Cancer stem cells from a rare form of glioblastoma multiforme involving the neurogenic ventricular wall

  University of California eScholarship Repository

Summary: address the tumor-initiating cells (or CSCs). Developingto focus on these tumor- initiating cells at a single-celltumor-initiating capacity. Clinically, it is of great interest to have a successful isolation of glioblastoma stem cells


2012-01-01

139

Placebo Adherence and Its Association with Morbidity and Mortality in the Studies of Left Ventricular Dysfunction

  University of California eScholarship Repository

Summary: Outcome Total mortality CVD mortality Non-CVD mortality CHD mortality Incident CVD events (fatal andOutcome Total mortality CVD mortality Non-CVD mortality CHD mortality Incident CVD events (fatal and

Avins, Andrew L.; Pressman, Alice; Ackerson, Lynn; Rudd, Peter; Neuhaus, John; Vittinghoff, Eric
2010-01-01

140

Genetics of Arrhythmogenic Right Ventricular Cardiomyopathy in Boxer dogs: a cautionary tale for molecular

  University of Cambridge - Dspace

Summary: respects boxer ARVC is similar to human ARVC, a major cause of cardiac 49 related sudden death in young adults. Similar diseases have been described as 50 isolated cases in other breeds including Labrador retriever, Bulldog, Dalmatian 51 dog, Shetland...

Sargan, David
2015-01-01

141

BioSystems 71 (2003) 7180 Reentrant waves in a ring of embryonic chick ventricular cells

  Biology and Medicine Websites

Summary: was designed to study the dynamics of reentry in a ring geometry of cardiac tissue culture. Reentrant calcium waves in rings of cultured embryonic chick cardiac myocytes were imaged using a macroscope to monitor reentrant rhythms in cardiac tissue. © 2003 Elsevier Ireland Ltd. All rights reserved. Keywords: Cardiac

Glass, Leon
2003-01-01

142

Artificial muscle technology applied towards treating ischemic mitral regurgitation caused by left ventricular remodeling

  MIT - DSpace

Summary: Ischemic Mitral Regurgitation (MR) affects a large portion of patients suffering from ischemic heart disease. Significant MR develops in one quarter to one third of patients who suffer from ischemic heart disease and doubles ...

Sabourin, Nicaulas A. (Nicaulas Alexandre), 1978-
2004-01-01

143

Impact of Acute Pulmonary Embolization on Arterial Stiffening and Right Ventricular Function in Dogs

  Engineering Websites

Summary: area strain) correlates with the total arterial compliance (stroke volume-to-pulse pressure ratio). Our­vascular hemodynamic coupling, Cardiac Magnetic Resonance Imaging, Pulse pressure. INTRODUCTION Pulmonary arterial. As a consequence of the increase in pressure, the proximal pulmonary arteries (PAs) become progressively stiffer

Chesler, Naomi C.

144

MODELS OF VENTRICULAR FIBRILLATION PROBABILITY AND NEUROMUSCULAR STIMULATION AFTER TASER USE IN HUMANS

  Multidisciplinary Databases and Resources Websites

Summary: of Doctor of Philosophy (Electrical Engineering) at the University of Wisconsin at Madison 2007 #12;i TABLE OF CONTENTS TABLE OF CONTENTS...............................................................................................................................i.................................................................................................................................................vi SCOPE OF WORK

Sheridan, Jennifer

145

Right ventricular ejection fraction from equilibrium and first pass scintigraphic cardiac images

  Texas A&M University - TxSpace

Summary: allow the temporal separatiou of RV from other chambers, they are too noisy for the accurate delineation of the outline of the ventricles, which is needed for computing the ejection fraction. In our approach, first the heart boundary is extracted..., and Warren EI. Moore of St. Luke's Episcopal Hospital and Department of Radiology, Baylor College of Medicine for their support and suggestions. vn TABLE OF CONTENTS CHAPTER Page INTRODUCTION . A. Circulatory system 1. Anatomy of the heart 2...

Nakamura, Eiji
1993-01-01

146

Finding Hidden Patterns in Complex Ventricular Ectopy V Schulte-Frohlinde

  Environmental Management and Restoration Websites

Summary: risk. Frequent PVCs are, for example, found in subjects with congestive heart failure. In the RR of 200 subjects with congestive heart failure. Out of these we have initially selected those subjects heart failure (subject 2 in the following figures). The upper panel shows 8000 beats, the lower panel

Ashkenazy, Yossi "Yosef"

147

Hemodynamic Improvement in Cardiac Resynchronization Does Not Require Improvement in Left Ventricular

  Physics Websites

Summary: and pacing-induced heart failure (n 7), we studied the effects of CRT on LV rotation mechanics in vivo by 3 bundle branch block with pacing-induced heart failure or CRT, but there was significant apex in the mechanically dyssynchronous heart. These results suggest that LV rotation mechanics is an index of global LV

Paris-Sud XI, Université de

148

Modeling, Estimation and Control of Cardiovascular Systems with A Left Ventricular Assist Device

  Engineering Websites

Summary: of Virginia, Charlottesville, VA 22903 4Utah Artificial Heart Institute, Salt Lake City, UT 84103 Abstract estimation error is small, and that the ab- normal hemodynamic variables of a congestive heart failure heart failure (CHF) patients. Heart disease is the leading cause of death in the Unite States. Nearly 5

Wu, Yi

149

Cerebral ventricular changes associated with transitions between normal cognitive function, mild cognitive impairment, and dementia.

  University of California eScholarship Repository

Summary: Data show median ± interquartile range in annual percent volume change in brain and ventricle. We citeData show me- dian interquartile range in annual percent volume change in brain and ventricle. We cite


2007-01-01

150

Quantification of Systolic and Diastolic Left Ventricular Twist Using Fourier Analysis of STimulated Echoes (FAST) Magnetic Resonance Imaging

  University of California eScholarship Repository

Summary: test of cardiac function; pathologic physiology and clinicalcardiac fiber and sheet structure during contraction: quantification with diffusion tensor MRI. American Journal of Physiology-physiology, whereas breath holding may cause subtle Valsalva(79) or Mueller(80) maneuvering, which will alter cardiac

Reyhan, Meral Leigh
2012-01-01

151

Phase statistics approach to human ventricular fibrillation Ming-Chya Wu,1,2,3,* Eiichi Watanabe,4,

  Physics Websites

Summary: of Medicine, Toyoake, Aichi-Ken 470-1192, Japan 5 Educational Physiology Laboratory, Graduate School VF is known to be the most dangerous cardiac arrhythmia, frequently leading to sudden cardiac death SCD . During VF, cardiac output drops to nil and, unless the fibrillation is promptly halted, death


152

Evaluation of external ventricular drain complications and the use of a procedure-targeted image-guidance system

  MIT - DSpace

Summary: Access to the cerebral ventricle (e.g. ventriculostomy) is required to manage multiple life-threatening ailments. It can be done either in the operating room or at the bedside to relieve increased intracranial pressure or ...

Patil, Vaibhav Devidas
2011-01-01

153

A Virtual Endoscopy System for the Planning of Endoscopic Interventions in the Ventricular System inside of the Human

  Computer Technologies and Information Sciences Websites

Summary: ¨ubingen cDepartment of Neurosurgery University Hospital T¨ubingen ABSTRACT Virtual Medicine is an emerging of different modalities. In recent years, Virtual Endoscopy has become a very popular area in Virtual Medicine of view through the endoscope, and the sensitive nature of the brain tissue [1]. To optimize the success

Bartz, Dirk

154

MAPPING VENTRICULAR CHANGES RELATED TO DEMENTIA AND MILD COGNITIVE IMPAIRMENT IN A LARGE COMMUNITY-BASED COHORT

  Computer Technologies and Information Sciences Websites

Summary: ,5,8,9,10 , Yanxi Liu 6,11 , Arthur W. Toga 7 , James T. Becker 3,4,5 Department of Neurology, University of California, Davis 1 ; Departments of Epidemiology 2 , Neurology 3 , Psychology 4 , Psychi- atry 5 , and Radiology 6 , University of Pittsburgh; Department of Neurology, University of California, Los Angeles 7


155

Effects of Protein Phosphatase and Kinase Inhibitors on Ca2 and Cl Currents in Guinea Pig Ventricular Myocytes

  Biology and Medicine Websites

Summary: Effects of Protein Phosphatase and Kinase Inhibitors on Ca2 and Cl Currents in Guinea Pig of this study was to compare the effects of various protein phosphatase and protein kinase inhibitors, it is not clear whether both of these channels are regulated in concert by protein kinase A (PKA) or whether


156

Differences in the Cerebral Hemodynamics Regulation Mechanisms of Premature Infants with Intra-Ventricular Hemorrhage Assessed by

  Engineering Websites

Summary: hemodynamics regulation consists of several mechanisms that try to keep brain homeostasis. In premature infants their brain to damage. The status of the cerebral regulation mechanism is classically assessed by measuring of blood gases, with surrogate measurements for cerebral blood flow, such as brain tissue oxygenation (r


157

Atrial Near-Field and Ventricular Far-Field Analysis by Automated Signal Processing at Rest and During Exercise

  Computer Technologies and Information Sciences Websites

Summary: several conditions including at rest, bipolar at rest, in an upright position, during treadmill exercise measured. In bipolar configuration, near-field amplitude at rest was 3.04 ± 0.94 mV (unipolar)/3.36 ± 1.0 mV (bipolar) versus 3.18 ± 1.0 mV (bipolar) at peak exercise. Far-field amplitude at rest was 1.66 ± 1

Lübeck, Universität zu

158

15. Andreu MJ, Dvila JC, Real MA, Guirado S (1996) Intrinsic connections in the anterior dorsal ventricular

  Biology and Medicine Websites

Summary: -Vanderzee E (1995) Efferent connections of the lateral cortex of the lizard Gekko gecko: evidence for separate Gekko gecko studied with Phaseolus vulgaris-leucoagglutinin. J Comp Neurol 285:289­303 18. Martínez

Krubitzer, Leah A.
1996-01-01

159

Int Conf IEEE Engineering in Medicine and Biology Society 1999, pages 848-851 Three-Dimensional Regional Left Ventricular

  Biology and Medicine Websites

Summary: . To determine regional 3D strains in the left ventricle of the heart we employed digital sonomicrometry of myocardial viability. Developments in 3D Magnetic Resonance Imaging (MRI) techniques such as MR tagging [2 (Sonometrics Corporation) along with the use of digital sonomicrometry to determine 3D crystal locations

Duncan, James S.

160

Automated patient-specific classification of premature ventricular contractions In this paper, we present an automated patient-specific

  Engineering Websites

Summary: % for differentiating normal, PVC, and other beats. 1. Introduction The morphological and temporal characteristics-hidden layer MLP classifier to achieve 95.16% accuracy in differentiating normal and PVC from other beats over-specific classification system designed for robust and accurate detection of PVC beats. The feature extractor

Gabbouj, Moncef

161

Alternans and higher-order rhythms in an ionic model of a sheet of ischemic ventricular muscle

  Biology and Medicine Websites

Summary: Humberto Arcea) Departamento de Fi´sica, Facultad de Ciencias, Universidad Nacional Auto´noma de Me´xico, Apartado Postal 70-542, 04510 Me´xico, Distrito Federal, Me´xico Aoxiang Xu Department of Physiology Nacional Auto´noma de Me´xico, Apartado Postal 70-542, 04510 Me´xico, Distrito Federal, Me´xico Michael R

Guevara, Michael R.

162

Regional and temporal heterogeneity of postsystolic wall thickening is associated with left ventricular asynchrony in normal and experimental stunned myocardium.

  Computer Technologies and Information Sciences Websites

Summary: of the anterior descending artery ("LAD stunning") followed by reperfusion. At baseline, there was no PSWT wall. With LAD stunning, PSWT in the anterior wall was transient and of lower magnitude vs posterior and apical segments (additional n=4 for both LCX and LAD stunning). Conclusion: The present study

Boyer, Edmond

163

QUANTITATIVE GENETIC MODELING OF LATERAL VENTRICULAR SHAPE AND VOLUME USING MULTI-ATLAS FLUID IMAGE ALIGNMENT IN TWINS

  Biology and Medicine Websites

Summary: , University of Queensland, Brisbane, Australia 3 Genetic Epidemiology Laboratory, Queensland Institute of Medical Research, Brisbane, Australia ABSTRACT Despite substantial progress in measuring the 3D profile and test genetic models at each 3D location in an image, and (2) to detect effects with reasonable power

Thompson, Paul

164

Quantification of Systolic and Diastolic Left Ventricular Twist Using Fourier Analysis of STimulated Echoes (FAST) Magnetic Resonance Imaging

  University of California eScholarship Repository

Summary: gender information was missing for eight and five of the 29 moderategender, height, end-systolic volume, end-diastolic volume, and LVED mass of the normal, moderateGender information is missing for 8/5 subjects Image Quality All of the data from the normal, moderate

Reyhan, Meral Leigh
2012-01-01

165

The accompanying paper (Vaughan-Jones et al. 2002) reported that, in rabbit ventricular myocytes, the apparent

  Biology and Medicine Websites

Summary: inorganic ions like Na+ or K+ . This value of DH app represents the intrinsic mobility of H+ equivalents, the apparent diffusion coefficient for the intracellular H+ ion (DH app) or its ionic equivalent such as OH. The consequence of a low DH app is that a spatially localized intracellular acidosis spreads slowly as a diffusive

Keener, James P.

166

EXCELLENTIA CoLumbIA ENgINEErINg 37 rrhythmogenic right ventricular cardiomyopathy (ARVC), which affects one in

  Materials Science Websites

Summary: , fibro-fatty tissue replaces healthy heart muscle, and the heart's beating becomes uncoordinated. As a result, the heart can't pump well. With ARVC as their inspiration, Hayden Huang and his team are figuring out how heart cells respond to physical stresses. ARVC can be caused by genetic mutations that affect

Hone, James

167

Development and construction of an active mock circulation loop (MCL) for the evaluation of ventricular assist devices (VAD)

  Energy Storage, Conversion and Utilization Websites

Summary: of heart assist devices. The subject of this work is the conception and construction of an active by Berlin Heart and the existing passive MCL, customized concepts have been developed and implemented of the circulatory model is the simulation of the residual activity of the human heart, considering the Frank

Berlin,Technische Universität

168

Abstract--The purpose of this study, was to asses whether LF/(LF+HF) obtained from ventricular repolarization

  Physics Websites

Summary: repolarization variability (VRV) reflects the state of sympathovagal balance. The VRV time series and Heart Rate Nervous System (ANS) profiles (athletes, cardiac transplant patient, heart failure patients and normal and VRVu), ii) LF/(LF+HF) index in HRV series are significantly different between normal subjects and heart

Paris-Sud XI, Université de

169

Third Report of the California Hospital Outcomes Project (1997): Report on Heart Attack, 1991-1993 Volume 2

  University of California eScholarship Repository

Summary: code for congenital ventricular septal defects is includedcardiac septal defect Ventricular septal defect CentralVentricular flutter Cardiac arrest Rupture of chordae tendinae Rupture of papillary muscle Acquired cardiac septal

Romano, Patrick S; Luft, Harold S; Rainwater, Julie A
1997-01-01

170

An EM Strategy for Ventricular Wall Motion Analysis HuaFeng Liu, LungNgong Wong, and PengCheng Shi

  Computer Technologies and Information Sciences Websites

Summary: implications for the diagnosis and treatment of cardiac diseases. In this paper, we propose a novel multiframe to quantify cardiac wall motion over the complete cardiac cycle. In this paper, we propose a novel multiframe cardiac cycle. Initial experiments have been performed with 2D cardiac MR image sequences. Keywords

Shi, Pengcheng

171

JOURNAL OF LATEX CLASS FILES, VOL. 6, NO. 1, JANUARY 2007 1 A Novel Model-Based 3D+time Left Ventricular

  Engineering Websites

Summary: JOURNAL OF LATEX CLASS FILES, VOL. 6, NO. 1, JANUARY 2007 1 A Novel Model-Based 3D+time Left, this is not feasible for complex 3D+time structures such as the cardiac left ventricle due to increased training at segmentation- time, instead of at model-time. We apply our approach to 33 3D+time MRI cardiac datasets

Whelan, Paul F.

172

Abstract--Two semi-automatic methods for the detection of the left ventricular border in two-dimensional short axis

  Biology and Medicine Websites

Summary: and improve image contrast [6]. Andrade et al. [1] applied the discrete wavelet transform (DWT) to reduce through the comparison between the semi-automatic continuous boundaries and manuals boundaries sketched

Carvalho, João Luiz

173

1 Maximizing power to track Alzheimer's disease and MCI progression by LDA-based 2 weighting of longitudinal ventricular surface features

  Mathematics Websites

Summary: U N C O R R E C T E D P R O O F 1 Maximizing power to track Alzheimer's disease and MCI progression. Jack Jr. d , Michael W. Weiner e,f,g , Paul M. Thompson a,h, 5 and for the Alzheimer's Disease of Alzheimer's disease based on brain imaging must 53 offer relatively high power to detect longitudinal

Wang, Yalin

174

The role of abnormal stress and strain distributions in the initiation and sustainment of ventricular arrhythmias in dogs with aortic stenosis.

  Biology and Medicine Websites

Summary: BACKGROUND AND SIGNIFICANCE Heart failure (HF) is a major cause of death in developed countries, affecting) represent a significant population of HF patients that suffer from either systolic (failure to pump enough to reduced O2 supply), syncope (loss of consciousness due to poor cerebral perfusion), and heart failure

Gleeson, Joseph G.

175

Abnormal heart rhythms, notably atrial and ventricular fibrillation, are leading causes of death and disability. Between 0.5 million and 1 mil-

  Chemistry Websites

Summary: fatal arrhythmia if it occurs, but they do not prevent arrhythmia. Atrial fibrillation affects more than of atrial fibrillation or intervention -- using drugs or ablation therapy -- that can prevent arrhythmia, and such treatment carries risks, including actually promoting arrhythmia (Box 2). There are many other forms

Cai, Long

176

Hysteresis and bistability in the direct transition from 1:1 to 2:1 rhythm in periodically driven single ventricular cells

  Biology and Medicine Websites

Summary: in the experiments as in the model. Finally, we point out a few implications of our findings for cardiac arrhythmias in the intact heart, one of a variety of abnormal cardiac arrhythmias can arise. In single quies- cent cells

Guevara, Michael R.

177

Neurological and behavioral abnormalities, ventricular dilatation, altered cellular functions, inflammation, and neuronal injury in brains of mice due to common, persistent, parasitic infection

  University of Cambridge - Dspace

Summary: were available continuously and the care and use of mice was in accordance with AALAC and institutional guidelines. The colony was doc- umented to be free of a large number of viral, bacterial, and parasitic agents [62]. Specifically, testing... Mouse Thymic Virus (MTV) Bacterial pathogens Mycoplasma pulmonis; Salmonella spp.; Citrobacer rodentium; Clostridium piliforme; Cilia Associated Respiratory (CAR) Bacillus Parasitic pathogens Endoparasites; Pinworms (Syphaciasp, Aspiculuris tetraptera...

Hermes, Gretchen; Ajioka, James W; Kelly, Krystyna A; Mui, Ernest; Roberts, Fiona; Kasza, Kristen; Mayr, Thomas; Kirisits, Michael J; Wollman, Robert; Ferguson, David J P; Roberts, Craig W; Hwang, Jong-Hee; Trendler, Toria; Kennan, Richard P; Suzuki, Yasuhiro; Reardon, Catherine; Hickey, Adam William; Chen, Lieping; McLeod, Rima
2008-10-23

178

Mapping Ventricular Expansion and its Clinical Correlates in Alzheimer's Disease and Mild Cognitive Impairment using Multi-Atlas Fluid Image Alignment

  Biology and Medicine Websites

Summary: Department of Neurology, Los Angeles, CA, USA 2 Mayo Clinic College of Medicine, Rochester, MN 3 Depts reduced segmentation error. Surface-based statistical maps revealed powerful correlations between surface MRI, fluid registration, segmentation, surface modeling, statistical mapping, Alzheimer's disease

Thompson, Paul

179

Finding Hidden Patterns in Complex Ventricular Ectopy V Schulte-Frohlinde'i2,Y Ashkenazy', PCh Ivanov'13, A Morley-Davies4,L Glass5,

  Materials Science Websites

Summary: pause. The distribution of the PVCs appears random. PVCs (#PVC>5000 in 24 hours). Here, we choose three subjects that show different patterns in their temporal PVC distribution. The sampling rate is 128/s. 3

Stanley, H. Eugene

180

Journal of Theoretical Biology 249 (2007) 2945 Rhythms of high-grade block in an ionic model of a strand of regionally

  Biology and Medicine Websites

Summary: , and is often immediately followed by malignant cardiac arrhythmias such as ventricular tachycardia of regionally ischemic ventricular muscle. In addition, in the experimental work, ventricular arrhythmias on the higher-order rhythms that presage reentrant ischemic ventricular arrhythmias. r 2007 Elsevier Ltd. All

Guevara, Michael R.
2007-01-01

181

Naam: dhr. prof. dr. F. Haas Leeropdracht Congenitale Thoraxchirurgie

  Biology and Medicine Websites

Summary: Nov;68(5):1692-7 · Primary repair of aortic arch obstruction with ventricular septal defect in preterm artery disease and severely depressed left ventricular function after revascularization: correlation

Utrecht, Universiteit

182

Abstracts S63 corrected tail current density at 120mV was decreased by 6210%

  Physics Websites

Summary: ventricular arrhythmias. G004 TRANSCRIPTIONAL PROFILING OF ION CHANNEL GENES IN RIGHT-VENTRICULAR MYOCARDIAL and Univ de Montréal, Montréal, Canada Brugada syndrome is an inherited arrhythmia syndrome associated

Paris-Sud XI, Université de

183

Multi-Variate Visualization of Cardiac Virtual Tissue J W Handley

  Computer Technologies and Information Sciences Websites

Summary: state of a 2D cardiac virtual tissue. 1 Introduction Cardiac arrhythmias associated with heart disease and sustain the lethal arrhythmias of ventricular fib- rillation (VF) and ventricular tachycardia (VT) remain

Brodlie, Ken

184

Common variants at ten loci modulate the QT interval duration in the QTSCD Study

  Mathematics Websites

Summary: interval, a measure of cardiac repolarization, predisposes to ventricular arrhythmias and sudden cardiac with an accompanying paper from the QTGEN consortium, identify new candidate genes for ventricular arrhythmias and SCD

Abecasis, Goncalo

185

DOI:01.IJIT.02.02. ACEEE Int. J. on Information Technology, Vol. 02, No. 02, April 2012

  Physics Websites

Summary: is a cardiac disease in which the electrocardiogram showsoccurrence of ventricular tachycardia, flutter and fibrillation. This tachycardia is often precursor to ventricular fibrillation or stoppage of heart beats, electrocardiogram, tachycardia, flutter, fibrillation, RR intervals I. INTRODUCTION Cardiac diseases are one

Paris-Sud XI, Université de

186

Dietary supplementation of marine algae and the modification of thrombocyte aggregation parameters in avian pulmonary hypertension syndrome

  Texas A&M University - TxSpace

Summary: period of five reeks. Compared to normobaric broilers, hypobaric broilers had lower body weights, increased hematocrit levels, and greater right ventricular weight to total ventricular weight (RV/TV) ratios. Body weights, lung weights, and hematocrit...

Carpenter, Amy Renee
1999-01-01

187

Investigation and Construction of Self-oscillating Systems 

  Texas A&M University - TxSpace

Summary: , and finally to ventricular fibrillation20 as shown in Figure 1.4. Figure 1.4 Proposed evolutions of cardiac wave propagation patterns. The evolutions were underlying the transition from a normal cardiac rhythm to ventricular fibrillation. Transition from... normal sinus rhythm (NSR) to ventricular tachycardia (VT) and ventricular fibrillation (VF), as recorded on the surface electrocardiogram.20 5 Also, in a monolayer of chick embryonic heart cells, transition has been observed from target to spiral...

Wang, Guanqun
2012-07-16

188

SELECTION PROCEDURE No. 1/2013 SAPIENZA UNIVERSITY OF ROME

  Biology and Medicine Websites

Summary: regeneration: breakthrough in left ventricular assist device (VAD) and autologous stem cell combined therapy" Interview: "State of the art in the use of ventricular assist device (VAD) and cardiac stem cell therapies: "Boosting cardiac regeneration: breakthrough in left ventricular assist device (VAD) and autologous stem

Guidoni, Leonardo

189

Revised BC-990037 1 LOCALIZATION OF K

  Physics Websites

Summary: .Christe@ujf-grenoble.fr Short title: Inward rectifier currents and cardiac T-tubules Abstract Adult ventricular myocytes lose T of ventricular cardiomyocytes in the T- tubules. As a consequence, transient accumulation of K + ions in cardiac of the electrical activity of cardiac ventricular muscle (for a review: Carmeliet, 1993). The background inward

Paris-Sud XI, Université de

190

Dynamics of pure parasystole LEON GLASS, ARY L. GOLDBERGER, AND JACQUES BELAIR

  Biology and Medicine Websites

Summary: new approaches to assessing the mechanism of com- plex ventricular arrhythmias. ventricular cardiac arrhythmia; number theory; cardiac oscil- lator VENTRICULAR ARRHYTHMIAS are of major clinical impor- tance parasystole is a cardiac arrhythmia char- acterized by three distinctive features on the electrocar- diogram

Glass, Leon

191

Annals of Non-Invasive Electrocardiology Drugs that Prolong the QT Interval: Regulatory and QT-Measurement Issues from the

  Biology and Medicine Websites

Summary: for serious life- threatening ventricular arrhythmias? QT prolongation by drugs is well known, and common of malignant ventricular arrhythmias is directly related to the magnitude of the QT-prolonging effect the incidence of drug- induced malignant ventricular arrhythmias is very low for most drugs and usually not seen

Goldman, Steven A.

192

In Vivo evidence against cardiac controlled rhythmic aortic contractility in the dog 

  Texas A&M University - TxSpace

Summary: induced multifocal ventricular depolazizations which re- sulted in ventricular contractions. The electrical activ- itv did not influence the AD. Formalin induced atzial fibrillation had no affect on the pulse pressure dependent 36 BD... flutter was caused by mechanical stimulation of the right atrial appendage, following sensitization with meth- acholine. Complete atrioventricular conduction block and premature ventricular contractions of multifocal origin were induced by injection...

Gentile, Brian John
1984-01-01

193

Schizophrenia Research, 5 (1991) 1033113 SCHIZO 00172

  Biology and Medicine Websites

Summary: volumetric measurement techniques to the ventricular system in schizophrenics and normal controls* Martha E of these data sets into volumetric information and 3D display, we examined the ventricular system in a sample no significant differences were noted between groups on volumetric measures of ventricular brain ratio or lateral


1991-01-01

194

POSTER PRESENTATION Open Access Intraventricular ejection pressure gradient derived

  Physics Websites

Summary: Background Intra-ventricular pressure gradient along the direction of the outflow tract is generated acceleration measurement by phase contrast CMR as a new marker of left ventricular contractility: feasibility acceleration estimates within the left ventricular (LV) ejection flow, has been validated in vitro by using MRI

Paris-Sud XI, Université de

195

V.N. Biktashev & A.V. Holden "Re-entrant activity and its control by resonant drift in a two-dimensional model of isotropic homogeneous ventricular tissue" Proc Roy Soc

  Mathematics Websites

Summary: + IsiK + IbK + INaK + INa + IbNa + IsiNa + INaCa + IsiCa + IbCa) m = 200(V + 41) 1 - exp [-0.1(V + 41Na [Na+ ]o 140 + 3INaK + 3INaCa + IsiNa) [K+]i = -1 ViF (IK + IK1 + IsiK + IbK + Ito - 2INaK) [Ca2+ ]i = -1 2ViF (IsiCa + IbCa - 2INaCa) - Iup + Irel VSRupVrel ViVup - d dt [Ca2+ ]calmod - d dt [Ca2+ ]trop

Biktashev, Vadim N.

196

Ross-Konno and Endocardial Fibroelastosis Resection After Hybrid Stage I Palliation in Infancy: Successful Staged Left-Ventricular Rehabilitation and Conversion to Biventricular Circulation After Fetal Diagnosis of Aortic Stenosis

  University of California eScholarship Repository

Summary: to Biventricular Circulation After Fetal Diagnosis of Aorticselection for fetal intervention. Circulation 113:1401–1405fetal intervention followed by successful surgical takedown of the hybrid and conversion to biven- tricular circulation

Moon-Grady, Anita J.; Moore, Phillip; Azakie, Anthony
2011-01-01

197

Please cite this article in press as: Linninger A, et al. An impedance sensor to monitor and control cerebral ventricular volume. Med Eng Phys (2009), doi:10.1016/j.medengphy.2009.03.011

  Engineering Websites

Summary: is secreted from the arterial blood in the choroid plexus and the brain parenchyma. It circulates through blood flow. Acutely, it may even cause coma or death [1]. Hydrocephalus is a serious health problem

Linninger, Andreas A.
2009-01-01

198

PHYSICAL REVIEW E 84, 041927 (2011) Model-based control of cardiac alternans in Purkinje fibers

  Physics Websites

Summary: in simulated Purkinje fibers using localized current injections. We investigate the controllability instabilities leading to the lethal type of arrhythmia known as ventricular fibrillation (VF) [6]. Hence

Grigoriev, Roman
2011-01-01

199

Four and half LIM Domain-1 protein and its role in passive mechanics and hypertrophic signaling of the heart

  University of California eScholarship Repository

Summary: Measurements of ventricular septal thickness, LV internalseptal wall thickness at end diastole, LVIDd, left ventricularventricular posterior wall thickness at end-diastole (mm), IVSd, interventricular septal

Raskin, Anna Maria
2008-01-01

200

Reprint from J.L. Wu, K. Ito, S. Tobimatsu, T. Nishida, H. Fukuyama (Eds.)

  Computer Technologies and Information Sciences Websites

Summary: . Introduction To better understand the mechanisms of fatal arrhythmias, we had previ- ously developed, and also had visualized the various elec- trophysiological phenomena of arrhythmias in our ventricular

Igarashi, Takeo

201

Transient receptor potential (TRP) channels are a loosely related family of ion channels that share the properties of

  Biology and Medicine Websites

Summary: mem- brane trafficking. Some forms of triggered cardiac arrhythmia are also postulated to arise from repolarization, and ventricular arrhythmias. Microarray analysis reveals elevations in transcripts of hypertrophy

Clapham, David E.

202

ISSN: 1524-4539 Copyright 2009 American Heart Association. All rights reserved. Print ISSN: 0009-7322. Online

  Engineering Websites

Summary: - fibrillation remain the main modalities to restore normal sinus rhythm. Their simplicity, reliability, safety affected by the ready availability of this simple method for terminating atrial and ventricular


203

April 24, 2013 10:6 WSPC/INSTRUCTION FILE asymptoticAnaly-Mathematical Models and Methods in Applied Sciences

  Computer Technologies and Information Sciences Websites

Summary: . Chapelle, A. Collin and J.-F. Gerbeau pathologies ­ such as atrial fibrillation and ventricular tachycardia ­ e.g., atrial fibrillation ­ by blocking some abnormal conduction pathways. Computational


204

IEEE Trans Biomed Eng . Author manuscript Optimal Algorithm Switching for the Estimation of Systole Period From

  Physics Websites

Summary: with a biventricular pacemaker, for which various cardiac pacing configurations were tested. Ultrasound measurements an echo-Doppler acquisition, to evaluate the ventricular mechanical function while scanning different

Paris-Sud XI, Université de

205

R E S E A R C H A R T I C L E Fungicidalactivityofamiodarone istightlycoupled to calcium inux

  Biology and Medicine Websites

Summary: amiodarone; calcium influx; fungicide; cell death; calcium stress. Abstract The antiarrhythmic drug inset] is listed as a Class III antiarrhythmic drug that prevents atrial fibrillation and ventricular

Rao, Rajini

206

ORIGINAL RESEARCH Open Access Cardioprotective effects of adenosine within the

  Physics Websites

Summary: areas of myocardial infarction Mélanie Bousquenaud1 , Fatiha Maskali2 , Sylvain Poussier2 , Jennifer: Adenosine; Myocardial infarction; Contractility; Left ventricular remodelling; Gated cardiac positron

Paris-Sud XI, Université de

207

Engineering AspectsComputational Studies Coupling Pediatric Ventricle Assist Devices to the Fontan

  Engineering Websites

Summary: ,* CAROL W. LUCAS, W. JAMES PARKS, AND AJIT P. YOGANATHAN* In pediatric ventricular assist device (VAD levels. Selected VADs provided an acceptable cardiac output trace of the single left ventricle, after the VAD design and hemodynamics. ASAIO Journal 2005; 51:618­628. One important aspect in ventricular

Pekkan, Kerem

208

doi:10.1016/j.jacc.2009.06.004 2009;54;822-828J. Am. Coll. Cardiol.

  Engineering Websites

Summary: ISSUE: HEART RHYTHM DISORDERS Transient Local Injury Current in Right Ventricular Electrogram After substantial risk of death due to progressive pump failure. Methods Near-field (NF) bipolar right ventricular cardiac arrest. A local injury current (LIC) on NF RV EGM was defined as a deviation of EGM potential 1 m


209

Cardiac MyocyteSpecific Excision of the 1 Integrin Gene Results in Myocardial Fibrosis and Cardiac Failure

  Biology and Medicine Websites

Summary: of 1 integrin in the myocardium, we used Cre-LoxP technology to inactivate the 1 integrin gene-tipped catheterization of the intact 5-week-old 1 integrin knockout mice showed depressed left ventricular basal versus 88% in controls (n 15 each). By 6 months of age, mice with depressed ventricular expression of 1

Smith, Desmond J.

210

Timing Cycles Timing cycles

  Computer Technologies and Information Sciences Websites

Summary: Interval #12;Terminology Refractory Period: In pacing, a programmable parameter that controls the length to sensed events. · PVARP=Post Ventricular Atrial Refractory Period=atrial refractory period · VRP=Ventricular Refractory Period #12;Single chamber AAI AsAp PVC Ap Ap A Ref A-A Automatic Interval Escape Interval #12;Dual

Smith, Spencer

211

Basic Res Cardiol 97: 177 186 (2002) Steinkopff Verlag 2002 ORIGINAL CONTRIBUTION

  Biology and Medicine Websites

Summary: of an aorto-caval shunt, or 4 weeks after aortic banding (group C; n = 7). In all CHF models, left ventricular 3 ± 1, B 4 ± 1, C 5 ± 1 mmHg). Indicative of left ventricular hypertrophy and pulmonary congestion ­ aorto-caval shunt ­ aortic banding BRC331 Dr. med. A. Just ( ) Department of Cell and Molecular

Just, Armin
2002-01-01

212

Refinement of the HCUP Quality Indicators: Appendix 6 Indicator Definitions

  University of California eScholarship Repository

Summary: 35.51-52, 35.71) or ventricular septal defects (codes 35.53,VENTRICULAR SEPT DEFECT SECUNDUM ATRIAL SEPT DEF ENDOCARD CUSHION DEF NOS OSTIUM PRIMUM DEFECT ENDOCARD CUSHION DEF NEC COR BILOCULARE SEPTALVENTRICULAR SEPT DEFECT SECUNDUM ATRIAL SEPT DEF ENDOCARD CUSHION DEF NOS OSTIUM PRIMUM DEFECT ENDOCARD CUSHION DEF NEC COR BILOCULARE SEPTAL

Davies, Sheryl M.; Geppert, Jeffrey; McClellan, Mark; McDonald, Kathryn M.; Romano, Patrick S.; Shojania, Kaveh G.
2001-01-01

213

Suppressing arrhythmias in cardiac models using overdrive pacing and calcium channel blockers

  Biotechnology Websites

Summary: of treating a heart in ventricular fibrillation--applying a large voltage shock to the heart. Although the shock is of sufficient energy to annihilate fibrillation, it is also of sufficient strength to damage­4 Current ventricular defibrillation techniques rely on the application of a large voltage shock

Collins, James J.

214

Towards the selection of patients requiring ICD implantation by automatic classification from Holter monitoring indices

  Physics Websites

Summary: -LVEF patient is likely or not to undergo ventricular arrhythmia in the next six months. One classifier this classifier. 44 out of 186 patients underwent at least one treated ventricular arrhythmia during the six arrhythmia prediction performances of the ad-hoc classifier are NPV = 77% ± 13% and PPV = 31% ± 19% (Negative

Paris-Sud XI, Université de

215

Model Based Visualization of Cardiac Virtual Tissue J W Handley, K W Brodlie, R H Clayton

  Computer Technologies and Information Sciences Websites

Summary: arrhythmias such as this are an important cause of premature death in the industrialised world, yet the mechanisms that initiate and sustain the lethal arrhythmias of ventricular fibrillation (VF) and ventricular insight into abnormal cardiac function, such as arrhythmias. In this paper we discuss the is- sues

Brodlie, Ken

216

97:377-383, 2004. doi:10.1152/japplphysiol.01235.2001J Appl Physiol Kevin Kit Parker, James A. Lavelle, L. Katherine Taylor, Zifa Wang and David E.

  Materials Science Websites

Summary: . Garcia-Dorado, L. Agullo, A. Rodriguez-Sinovas, F. Padilla, L. Trobo and J. ventricular arrhythmias after://highwire.stanford.edu/lists/artbytopic.dtlcan be found atMedline items on this article's topics Medicine .. Ischemia Medicine .. Arrhythmia Physiology.physiology.orgDownloadedfrom #12;TRANSLATIONAL PHYSIOLOGY Stretch-induced ventricular arrhythmias during acute ischemia

Parker, Kevin Kit

217

Luo W, Gallagher M, Wiles J. Parameter-free search of time-series discord. JOURNAL OF COMPUTER SCIENCE AND TECHNOLOGY 28(2): 300310 Mar. 2013. DOI 10.1007/s11390-013-1330-8

  Computer Technologies and Information Sciences Websites

Summary: ventricular contraction arrhythmia[13] . The presence of arrhythmia is reflected in the time series discord segment for a patient with premature ventricular contraction arrhythmia. The anomalous subsequence circled indicates the presence of the arrhythmia. Regular Paper Support by Australian Research Council Linkage Grant

Gallagher, Marcus

218

The rule of bigeminy revisited: analysis in sudden cardiac death syndrome Claudia Lerma, PhD,a,b

  Physics Websites

Summary: afterdepolarizations. We evaluated these ventricular arrhythmias over extended periods in patients with sudden cardiac on the self-perpetuation of the arrhythmias. Results: Eight (53%) patients had classic torsade de pointes (Td bigeminy (N5% of total ventricular arrhythmias), (2) long corrected QT interval (N0.5 second), (3


219

Critical components for novel direct cardiac compression device 

  Texas A&M University - TxSpace

Summary: ............................................................................... 3 1.2 Ventricular Recovery ......................................................... 6 III AIM I PROBLEM STATEMENT .................................................... 8 IV AIM I METHODS AND DESIGN... in blood delivery, yet they do not aid the heart in a physiological manner. Such devices fall into a number of categories including: intravascular ventricular assist devices (IVADs), counter pulsation assist devices (CPADs), and direct cardiac...

Harrison, Jr., Lewis D.
2009-05-15

220

Control of electrical alternans in simulations of paced myocardium using extended time-delay autosynchronization

  Engineering Websites

Summary: , to the genesis of lethal arrhythmias such as ventricular fibrillation. Prior studies have considered various APD , to the genesis of lethal cardiac arrhythmias such as ventricular fibrillation. Such findings an in vitro preparation in which the heart's pacemaker cells, the sino-atrial (SA) node, have been removed

Gauthier, Daniel

221

IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING, VOL. 58, NO. 7, JULY 2011 2013 Termination of Reentrant Cardiac Action Potential

  Engineering Websites

Summary: --Several different types of rapid cardiac rhythm disor- ders, including atrial and ventricular fibrillation to be prominent players in both atrial and ventricular tachycardia and fibrillation. This approach eliminates the basis for developing new de- fibrillation protocols to test in experiments or more realistic models

Otani, Niels F.

222

Remote Visualization and Computational Steering of Cardiac Virtual Tissues using gViz

  Computer Technologies and Information Sciences Websites

Summary: common cause of premature adult deaths in the Western industrialised world. Atrial flutter/fibrillation is a common precursor of cerebral stroke, and ventricular fibrillation a common cause of death. Over half of a cardiac event. Ventricular fibrillation (VF) is recorded in about three quarters of sudden cardiac deaths

Brodlie, Ken

223

Clustering and Symbolic Analysis of Cardiovascular Signals: Discovery and Visualization of Medically Relevant Patterns in

  Computer Technologies and Information Sciences Websites

Summary: in which entropy approaches log2A Can detect: atrial fibrillation #12;Entropy: atrial fibrillation #12: ventricular bigeminy #12;Rhythms: ventricular trigeminy #12;Rhythms: ectopic atrial rhythm #12;Recurrent of symbols Absolute count of pattern Can detect: paroxysmal atrial tachycardia #12;Recurrent transient

Tian, Qi

224

ORIGINAL ARTICLE Adipocyte fatty acid-binding protein levels are associated with

  Chemistry Websites

Summary: ventricular diastolic dysfunction in morbidly obese subjects A Baessler1,6 , V Lamounier-Zepter2,6 , S Fenk1 ventricular diastolic dysfunction (LVDD) in obese subjects with varying degrees of the metabolic syndrome (MetS). METHODS: Fifty morbidly obese subjects with LVDD were selected at random and matched by age (±5 years

Cai, Long

225

Prevalence of symptoms and diagnoses for patients suspected of having congenital heart disease

  Mathematics Websites

Summary: .10 0.20 0.70 Y1 = normal Y2 = atrial septal defect without pulmonary stenosis or pulmonary hypertension Y5 = transposed great vessels Y6 = ventricular septal defect without pulmonary hypertension Y7 = ventricular septal defect with pulmonary hypertension X1 = age 1-20 years old X2 = age > 20 years old X3

Serfling, Robert

226

Influence of a constriction in the near field of the vocal folds: Physical modeling and experimental validation

  Computer Technologies and Information Sciences Websites

Summary: -singing phonation. This study aims to explore and model the possible aerodynamic interaction between the ventricular ventricular-fold replica in both cases. A theoretical flow modeling is proposed to quantify the aerodynamic: is it related to an acoustical feedback, a mechanical conduction through the laryngeal mucosa, an aerodynamic

Boyer, Edmond

227

Fundamental Performance Assessment of 2-D Myocardial Elastography in a Phased Array

  Engineering Websites

Summary: ) canine left-ventricular model, a theoretical framework was previously developed by our group to evaluate finite- element (FE) model of the canine left-ventricle [3, 4]. A 2-D convolutional image formation model canine left-ventricular model [3, 4] as previously used in the linear array simulation [2] was employed

Konofagou, Elisa E.

228

Three-Dimensional Stress and Strain in Passive Rabbit Left Ventricle: A Model Study

  Engineering Websites

Summary: of the ventricles. Previous models of passive mechanics have simulated the canine and rat left ventricles.3 measured in rat, canine, and porcine hearts.15,27,26 Despite experimental evidence that left ventricular of the canine LV incorporating ventricular torsion, transmural fiber anisot- ropy, and intracoronary blood

Vetter, Frederick J.

229

Original Article Mechanical function, glycolysis, and ultrastructure of perfused working

  Biology and Medicine Websites

Summary: -week duration, on: (1) left ventricular (LV) systolic and diastolic function of perfused working hearts heart failure (HF) characterized by elevations in ventricular diastolic pressures and volumes in vivo [1 hearts following thoracic aortic constriction Michael E. Dunna , Thomas G. Manfredib , Arthur C. Cosmasb

Vetter, Frederick J.

230

Angle-Independent Myocardial Elastography Theoretical Analysis and Clinical Validation

  Biology and Medicine Websites

Summary: image formation model and a 2D short-axis view of a 3D left-ventricular, finite-element model, in normal ABSTRACT Several methods have been introduced in the past few years to quantify left-ventricular strain of the contractility of the cardiac muscle and thus measurement of the extent of ischemia or infarct. In this paper

Konofagou, Elisa E.

231

Philadelphia University Faculty of Engineering

  Multidisciplinary Databases and Resources Websites

Summary: . Organizing local and international conferences and workshops related to the school. April 2005-Sept. 2006 fluid dynamics in a simplified model of the human ventricular system, The Eleventh annual Conference simulation of hydrocephalus in the Foramens of Monro of the human ventricular system, The12th CFD conference


232

AUTOMATED 3D MAPPING & SHAPE ANALYSIS OF THE LATERAL VENTRICLES VIA FLUID REGISTRATION OF MULTIPLE SURFACE-BASED ATLASES

  Biology and Medicine Websites

Summary: AUTOMATED 3D MAPPING & SHAPE ANALYSIS OF THE LATERAL VENTRICLES VIA FLUID REGISTRATION OF MULTIPLE clearly outperformed the standard single-atlas approach. 1. INTRODUCTION The ventricular system is a fluid by neurodegenerative diseases. Ventricular measures and surface-based maps provide sensitive assessments of atrophy

Thompson, Paul

233

University of California Year 2007 Paper 3189

  Computer Technologies and Information Sciences Websites

Summary: expansion in the Cardiovascular Health Study. Owen T Carmichael, L H Kuller, O L Lopez, P M Thompson, R, "Acceleration of cerebral ventricular expansion in the Cardiovascular Health Study." (2007). Neurobiology://repositories.cdlib.org/postprints/3189 #12;Acceleration of cerebral ventricular expansion in the Cardiovascular Health Study. Abstract


234

IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING, VOL. 52, NO. 4, APRIL 2005 557 Pulsatile Cerebrospinal Fluid Dynamics in the

  Engineering Websites

Summary: of the ventricular or sub- arachnoid section [m ]. Choroid plexus displacement [m]. Height of the ventricular Object Identifier 10.1109/TBME.2005.844021 CSF production rate in the choroid plexus [m /s]. CSF flow of choroid expansion [m]. Tissue width [m]. Reabsorption constant [m /(Pa s)]. Fluid Viscosity [Pa s]. Fluid

Linninger, Andreas A.

235

VOLUME 86, NUMBER 16 P H Y S I C A L R E V I E W L E T T E R S 16 APRIL 2001 Defibrillation via the Elimination of Spiral Turbulence in a Model for Ventricular Fibrillation

  Physics Websites

Summary: disturbances in the spatiotemporal electrical activation of the heart make it incapable of any concerted the whole heart to massive, and often counterproductive, electrical shocks. We propose a defibrillation hearts [1] and mathemati- cal models [3]. Recent experiments [4,5] have shown that, though VF

Sinha, Sitabhra

236

Investigations on the cause of electrocardiogram changes during dehydration 

  Texas A&M University - TxSpace

Summary: 'rontal 1'lane El e& trical Axes (Degrees) and Direction of Shift 50 IX. Mean Right Ventricular Pressures (mm. Ilg) Before and Af(, er. Dehydraiion. Exp. I and Exp. 11 Goats Systolic and. Dias(olic Right Ventricular Pres?uncs (mm. L(g) Before and Af... the cardio~ vascular response of irradiated rats. The mean height of the R wave in an unipolar central chest lead was in- creased as was the manifest ventricular activation po- tential calculated from limb data. There was no in- crease in P or T wave...

Clark, Donald Ray
1966-01-01

237

Zrich, 31. Mrz 2007 PROMOTIONSLISTE

  Environmental Sciences and Ecology Websites

Summary: laparoskopischer Tubenrefertilisation" Brunner Andrea Fiona, von Luzern in Zürich ,,Comparison of 64-Slice Computed Tomography with Gated SPECT for Evaluation of Left Ventricular Function" Fähnle Ivo, von Wallisellen ZH und

Zürich, Universität

238

602 IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY, VOL. 14, NO. 4, JULY 2006 Fluidic Operational Amplifier for Mock

  Engineering Websites

Summary: by the development and in vitro evaluation of ventricular assist devices (VADs). As various types of VADs and related need to evaluate VADs over a wide range of operating conditions that would not be possible

Paden, Brad

239

Open Access Available online http://ccforum.com/content/10/4/R124

  Physics Websites

Summary: 2006 Published: 30 Aug 2006 Critical Care 2006, 10:R124 (doi:10.1186/cc5033) This article is online at (isolated perfused hearts), myofilament Ca2+ sensitivity (skinned fibers), left ventricular nitric oxide end

Paris-Sud XI, Université de

240

IOP PUBLISHING PHYSICS IN MEDICINE AND BIOLOGY Phys. Med. Biol. 52 (2007) 40634080 doi:10.1088/0031-9155/52/14/004

  Biology and Medicine Websites

Summary: to evaluate the degree of cardiac diseases such as ischemia and infarction (Feigenbaum et al 2005). In current degrees of ventricular dysfunction (Feigenbaum et al 2005). These qualitative assessments can thus

Konofagou, Elisa E.
2007-01-01

241

Annals of Biomedical Engineering, Vol. 34, No. 4, April 2006 ( C 2006) pp. 660668 DOI: 10.1007/s10439-005-9050-z

  Engineering Websites

Summary: million per infusion). After the first and second embolizations, pulmonary artery pressures increased sites with embolization. Our results demonstrate that pulmonary artery pressure, resis- tance--Microspheres, Pulmonary embolism, Impedance spectrum, Right ventricular hydraulic afterload, Murine. INTRODUCTION

Chesler, Naomi C.

242

July 2010 Volume 6, Number 1 www.thejns.org

  Engineering Websites

Summary: ) abnormal brain enlargement was accompanied by increased CSF volume along with parenchymal edema. In this latter pattern, spontaneous ventricular rupture led to normalization of brain volume, implying edema from


243

Plastic Changes of Calcitonin Gene-Related Peptide in Morphine Tolerance: Behavioral

  Mathematics Websites

Summary: in the spinal cord (Yu et al., 1994, 1996a,b). It has been reported that intracerebro- ventricular injection induced by intra- cerebroventricular injection of CGRP (Welch et al., 1988). Although, at the spinal

Stephens, Matthew

244

IEEE TRANSACTIONS ON MEDICAL IMAGING, VOL. XX, NO. XX, MONTH 200X 1 Markov Random Field Modeling for

  Physics Websites

Summary: for Three-dimensional Reconstruction of the Left Ventricle in Cardiac Angiography Rub´en Medina, Member-dimensional ventricular shape improves the precision of Manuscript received September 06, 2005. R. Medina, J. Toro and D

Paris-Sud XI, Université de

245

Theory of action potential wave block at-a-distance in the heart Niels F. Otani*

  Physics Websites

Summary: - maining valid even when memory and waveback electrotonic effects are included. The condition suggests in space. Pastore et al. 4 have also observed discordant alternans in guinea pig ventricular muscle during

Otani, Niels F.

246

, 20131189, published 12 March 2014112014J. R. Soc. Interface Dimos Poulikakos and Vartan Kurtcuoglu

  Materials Science Websites

Summary: , Institute of Physiology, 5 Neuroscience Center Zurich, and 6 Zurich Center for Integrative Human Physiology are simulated in the ventricular space using subject-specific anatomy, wall motion and choroid plexus pulsations

Daraio, Chiara

247

CLINICAL INVESTIGATION Prediction of complex atrioventricular conduction

  Biology and Medicine Websites

Summary: across the tricuspid valve. The catheter was slowly withdrawn until a sharp His bundle deflection appeared betweenthe atrial and ventricular deflections.2 Multiple surface ECG leads (I, II, III, and V1

Guevara, Michael R.

248

Analysis of the fibre architecture of the heart by quantitative polarized light microscopy Accuracy, limitations and contribution to the study of the fibre architecture of the ventricles

  Mathematics Websites

Summary: of "pretzels". Next, the validity of the helical ventricular myocardial band model of Torrent-Guasp has been neither discard nor confirm Torrent-Guasp's model. #12;4 (4) Conclusions: Present limitations

Milisic, Vuk

249

Gwt%ovascular Cardiovascular Research 31 (1996) 371-379

  Biology and Medicine Websites

Summary: Charlotte a,Claire Medigue b, Christophe Vermeiren b, Gilles LePape `, Fraqois Car& d, Athanassia analysisassumessinusrhythm and ectopic ventricular beatsshould be rejected. The influence of the Autonomic Nervous System

Clairambault, Jean
1996-01-01

250

Non stationary model of the heartbeat time series in atrial fibrillation

  Mathematics Websites

Summary: . This adaptability relies on two mechanisms. The first one is the influence of the autonomous nervous system, ventricular rate. In this situation the control of the autonomous nervous system on the RR sequence fades

Cammarota, Camillo

251

RESEARCH Open Access Topographical transcriptome mapping of the

  Biology and Medicine Websites

Summary: are thought to exist in the ventricular zone of the MGE, but whether the underlying subventricular and mantle precursors as they progress into the subventricular and mantle zones of the MGE. The gene expression profiles

Ibáñez, Carlos

252

A method for guiding ablation catheters to arrhythmogenic sites using body surface electrocardiographic signals

  MIT - DSpace

Summary: Treatment of hemodynamically unstable ventricular arrhythmias requires rapid and accurate localization of the reentrant circuit. We have previously described an algorithm that uses the single-equivalent moving dipole model ...

Barley, Maya E.

253

Laboratory study on intracranial hypotension created by pumping the chamber of a hydrocephalus shunt

  University of Cambridge - Dspace

Summary: Abstract Background It has been reported that pumping a shunt in situ may precipitate a proximal occlusion, and/or lead to ventricular over-drainage, particularly in the context of small ventricles. In the laboratory we measured the effect...

Bromby, Adam; Czosnyka, Zofia; Allin, David M; Richards, Hugh K; Pickard, John D; Czosnyka, Marek
2007-03-26

254

Hemodynamic Responses to Varying Postural Stress

  Computer Technologies and Information Sciences Websites

Summary: system (The IQ System) was used to evaluate cardiac output (CO), stroke volume (SV), ventricular ejection responsible for circulatory homeostasis both on earth at +1G and in OG. These results may also serve


255

Monocyte-Directed RNAi Targeting CCR2 Improves Infarct Healing in Atherosclerosis-Prone Mice

  MIT - DSpace

Summary: Background—Exaggerated and prolonged inflammation after myocardial infarction (MI) accelerates left ventricular remodeling. Inflammatory pathways may present a therapeutic target to prevent post-MI heart failure. However, ...

Majmudar, Maulik D.

256

EVOLUTION OF THE VERTEBRATE BRAIN

  Biology and Medicine Websites

Summary: Mesencephalon Rhombencephalon Spinal cord Olfactory bulbus Cerebral hemispheres Limbic system Striatum Thalamus ·Neurochemical systems ·Ventricular system Dopaminergic System Substantia nigra pars compacta Spinal cord Limbic and functional properties of the vertebrate CNS ·Spinal cord: ·Segmental organization ·Autonomic nervous system

Cooper, Brenton G.

257

Lpd depletion reveals that SRF specifies radial versus tangential migration of pyramidal neurons

  MIT - DSpace

Summary: During corticogenesis, pyramidal neurons (~80% of cortical neurons) arise from the ventricular zone, pass through a multipolar stage to become bipolar and attach to radial glia[superscript 1], [superscript 2], and then ...

Pinheiro, Elaine M.

258

Lpd depletion reveals that SRF specifies radial versus tangential migration of pyramidal neurons

  MIT - DSpace

Summary: During corticogenesis, pyramidal neurons (~80% of cortical neurons) arise from the ventricular zone, pass through a multipolar stage to become bipolar and attach to radial glia[superscript 1, 2], and then migrate to their ...

Pinheiro, Elaine M.

259

BANDO DI SELEZIONE PER IL CONFERIMENTO DI 1 ASSEGNO PER LA COLLABORAZIONE AD ATTIVITA' DI RICERCA

  Physics Websites

Summary: (LVAD) e cellule staminali autologhe" ­ "Boosting cardiac regeneration: breakthrough in left ventricular assist device (LVAD) and autologous stem cell combined therapy (LVAD) e cellule staminali autologhe" - "Boosting cardiac regeneration: breakthrough

Guidoni, Leonardo

260

Conversion of glycerol to glycerol-3-phosphate (G3P) is one of the highly conserved steps of glycerol metabolism in evolutionary

  Biology and Medicine Websites

Summary: , catalyzing the oxidation of dihydroxyacetone phosphate, DHAP, to G3P) have been linked to sudden infant death syndrome and decreased cardiac Na2+ current resulting in ventricular arrhythmias and sudden death.2,3 Given

Kachroo, Pradeep

261

ENGINEERINGNEWS A doctoral student in Biomedical Engineering, Arielle

  Materials Science Websites

Summary: that is constructing a new pediatric ventricular assist device. Incorporating data from CT scans, she is developing of Arielle`s achievements and leadership. Her novel research on the next generation of pediatric heart pumps

McGaughey, Alan

262

CLASSIFICATION OF ATRIAL FIBRILLATION PRONE PATIENTS USING ELECTROCARDIOGRAPHIC PARAMETERS IN NEURO-FUZZY MODELING

  Computer Technologies and Information Sciences Websites

Summary: cardiac arrhythmia 2.5 million people/year (US only). ·During AF, electrical impulses originate from many has been associated with stroke, ventricular arrhythmias and the need for permanent pacemakers. ·A

Simon, Dan

263

Cleveland Clinic, Anesthesiology Institute, 2 Cleveland State University, Electrical and Computer Engineering Department,

  Computer Technologies and Information Sciences Websites

Summary: : stroke, ventricular arrhythmias, and permanent pacemakers · Method to identify patients with highest AF common cardiac arrhythmia: 2.5 million people/year/US; > 350/min electrical impulses from ectopic sources

Simon, Dan

264

Final report on EPSRC project EP/D074789/1 + EP/D074746/1 I.V. Biktasheva, D. Barkley, V.N. Biktashev

  Mathematics Websites

Summary: -entrant arrhythmias, including the most lethal one, the ventricular fib- rillation. Under ideal conditions, a spiral electrophysiology: researchers working in experimental studies of re-entrant arrhythmia and their mathematical

Biktashev, Vadim N.

265

Prediction of Paroxysmal Atrial Fibrillation (PAF) Onset through

  Computer Technologies and Information Sciences Websites

Summary: in Electrical Engineering and Computer Science Abstract PAF is a type of progressive cardiac arrhythmia that poses severe health risks, sometimes leading to ventricular arrhythmia and post-operative mortality


266

Naam: dhr. Prof. Dr. Harold V.M. van Rijen Leeropdracht Innovatieve leervormen in het Biomedisch Onderwijs

  Biology and Medicine Websites

Summary: In Decreased Nav1.5 Expression And Reduced Sodium Current Which Accounts For Arrhythmia Vulnerability with Dispersed Conduction and Enhanced Susceptibility to Ventricular Arrhythmias. Eur J Heart Fail. 2010

Utrecht, Universiteit

267

Cardiovascular effects of 1,1-dimethyl-hydrazine in the anesthetized dog 

  Texas A&M University - TxSpace

Summary: period of time to shock levels, The pace~ maker of the heart and auriculoventricular conduction are depressed, With very large doses, the contractility of the heart itself is decreased, and terminally ventricular fibril lation may supervene ~" Walton...

Britz, William Edward, Jr
1964-01-01

268

miR-153 and miR-335, Ethanol Sensitive MicroRNAs, Control NSC/NPC Maturation during Fetal Brain Development 

  Texas A&M University - TxSpace

Summary: dysregulation results in neuronal premature-maturation via increasing asymmetric cell divisions, driving neuronal early differentiation through inducing stem cell genes DCX and NeuroD1 in the ventricular zone (VZ) of the developing cortex. In sum, my data...

Tsai, Pai Chi
2014-05-05

269

ECG beat classification using a cost sensitive classifier Z.Zidelmal,a,

  Computer Technologies and Information Sciences Websites

Summary: in the heart allows the impulse gen- erated by the Sino-Atrial (SA) node to be rapidly propagated to the my of the ventricles. For example, the risk of Ventricular Fibrillation (VF) for patients with a structural heart

Boyer, Edmond

270

A surface-based electrophysiology model relying on asymptotic analysis and motivated by cardiac atria modeling

  Mathematics Websites

Summary: of pathologies ­ such as atrial fibrillation and ventricular tachycardia ­ directly affecting electrophysiology the procedure called radio-frequency ablation which aims at treating cardiac arrythmias ­ e.g., atrial fibrillation ­ by blocking some abnormal conduction pathways. Computational electrophysiology modeling ­ when


271

Computer simulations of successful defibrillation in decoupled and non-uniform cardiac tissue

  Biology and Medicine Websites

Summary: #12;Introduction Defibrillation is a common clinical procedure to terminate atrial and ventricular fibrillation. An externally applied electric field leads to the development of so-called virtual electrode

Utrecht, Universiteit

272

Enhanced Postischemic Functional Recovery in CYP2J2 Transgenic Hearts Involves Mitochondrial ATP-Sensitive K

  Biotechnology Websites

Summary: -specific overexpression of CYP2J2 were generated. CYP2J2 transgenic (Tr) mice have normal heart anatomy and basal contractile function. CYP2J2 Tr hearts have improved recovery of left ventricular developed pressure (LVDP

Hammock, Bruce D.

273

ISSN: 1524-4571 Copyright 2006 American Heart Association. All rights reserved. Print ISSN: 0009-7330. Online

  Biotechnology Websites

Summary: ventricular developed pressure (LVDP) and less infarction compared with WT hearts after 20 minutes ischemia, lipoxygenases, and cytochrome P450 (CYP) monooxygenases to generate numerous metab- olites, collectively termed

Hammock, Bruce D.

274

Longitudinal transcriptional analysis of developing neointimal vascular occlusion and pulmonary hypertension in rats

  Biotechnology Websites

Summary: intra-acinar pulmonary arteries, converting it to a neointimal response (28). In this model, rats demonstrate an initial gradual increase in pulmonary arterial and right ventricular systolic pressures (RVSPs

Storey, John D.

275

Cardiovascular effects of apelin in vivo in man 

  Edinburgh, University of - Research Archive

Summary: Background The apelin system is a novel peptidic pathway widely expressed in the heart and vasculature. In preclinical studies, apelin receptor agonism mediates nitric oxide-dependent vasodilatation, reduces ventricular ...

Japp, Alan Gordon
2013-07-06

276

Evidence regarding clinical use of microvolt T-wave alternans

  MIT - DSpace

Summary: Microvolt T-wave alternans (MTWA) testing in many studies has proven to be a highly accurate predictor of ventricular tachyarrhythmic events (VTEs) in patients with risk factors for sudden cardiac death (SCD) ...

Hohnloser, Stefan H.

277

Appl. Phys. B 72, 859863 (2001) / Digital Object Identifier (DOI) 10.1007/s003400100562 Applied Physics B

  Engineering Websites

Summary: of helicobacter pylori, which causes ventricular ulcers [5]). De- tection of biomedically-produced NO and its absorption lines can be selected to avoid interference from other species such as CO2 and H2O absorbing


2001-01-01

278

ERIC R. SCERRI EDITORIAL 7

  Multidisciplinary Databases and Resources Websites

Summary: of ventricular fibrillation in the human heart, are based on very different substrates than the B­Z family the early origins of Eugene Wigner's application of group theory to quantum mechanics, a development which

Scerri, Eric

279

Clinical Study Abnormal thalamocortical dynamics may be altered by deep

  Biology and Medicine Websites

Summary: a University of Oxford, Department of Anatomy Physiology and Genetics, Parks Road, Oxford, OX1 3PT, UK b nucleus (VPL) of the sensory thalamus and/or the peri- ventricular grey (PVG) or periaqueductal grey (PAG

Hansen, Peter

280

Chamber-Specific Cardiac Expression of Tbx5 and Heart Defects in HoltOram Syndrome

  Biology and Medicine Websites

Summary: of the atrioventricular valves also express high levels of Tbx5. These patterns of Tbx5 expression provide an embryologic, abnormal ventricular trabeculation, hypoplastic left heart, mitral valve prolapse, and anomalous pulmonary

Tabin, Cliff

281

Genetic association study of QT interval highlights role for calcium signaling pathways in myocardial repolarization

  MIT - DSpace

Summary: The QT interval, an electrocardiographic measure reflecting myocardial repolarization, is a heritable trait. QT prolongation is a risk factor for ventricular arrhythmias and sudden cardiac death (SCD) and could indicate ...

Wang, Xinchen

282

Optimization for Multi-Region Segmentation of Cardiac MRI

  Mathematics Websites

Summary: ventricles, myocardium and the left ventricular papillary muscles in MRI. The model enforces geometric information about the cardiac function is gained from segmenting the right ventricle (RV) as well

Lunds Universitet

283

An Efficient Optimization Framework for Multi-Region Segmentation based on

  Mathematics Websites

Summary: and right ventricles, myocardium and the left ventricular papillary muscles in MRI and to lung segmentation information about the cardiac function is gained from segmenting the right ventricle (RV) as well. Our

Lunds Universitet

284

Evidence for the Presence of Calsequestrin in Two Structurally Different Regions of

  Biology and Medicine Websites

Summary: , and characterized calsequestrin from canine ventricular muscle tissue (17). In the same study, indirect immunofluorescence labeling showed that most of the calsequestrin is localized in the I-band region of rat and canine

Campbell, Kevin P.

285

Analysis of 3D Motion Effects in Myocardial Elastography Wei-Ning Lee and Elisa E. Konofagou

  Engineering Websites

Summary: canine finite-element (FE) left ventricular models. A 3D convolutional image formation model-element canine left ventricle models in both normal and left-circumflex (LCx) ischemic cases [4]. Nevertheless, 3

Konofagou, Elisa E.

286

Angle-independent and multi-dimensional myocardial elastography From theory to clinical validation

  Engineering Websites

Summary: on well-estab- lished, 3D finite-element, canine, left-ventricular models in both normal and left-element models Three-dimensional FE models of the normal (control) and left- circumflex (LCx) ischemic canine

Konofagou, Elisa E.

287

Electromechanical wave imaging for arrhythmias This article has been downloaded from IOPscience. Please scroll down to see the full text article.

  Engineering Websites

Summary: are first validated by imaging the heart of an open-chest canine while simultaneously mapping the electrical and ventricles of closed-chest, conscious canines during sinus rhythm and during right- ventricular pacing

Konofagou, Elisa E.

288

ieee transactions on ultrasonics, ferroelectrics, and frequency control, vol. 54, no. 11, november 2007 2233 Theoretical Quality Assessment of Myocardial

  Engineering Websites

Summary: of the canine left ventricle. A nor- mal (control) and an ischemic (left-circumflex, LCx) model, which more established finite-element, left-ventricular canine models. In a prelim- inary study, the 2-D myocardial

Konofagou, Elisa E.

289

Functional analysis of the mospd gene family 

  Edinburgh, University of - Research Archive

Summary: thinning of the right ventricular free heart wall which resembles other mouse mutant phenotypes as well as human congenital heart defects caused by a loss of desmosome and adherens junction mediated cell adhesion between cardiomyocytes. The protein encoded...

Buerger, Katrin
2010-01-01

290

BioMed Central Page 1 of 2

  Engineering Websites

Summary: in a BME pro- gram to support advanced-year courses in biomechanics (cardiovascular or musculoskeletal to identify arrhythmias, myocardial infraction, arte- rial and ventricular diseases, etc.). A useful feature

Gefen, Amit

291

Independent Effects of Incubation Temperature and Gonadal Sex on the

  Biology and Medicine Websites

Summary: of the hypothalamus are determined primarily by incubation temperature, not by gonadal sex. However, incubation hypothalamus, external amygdala, dorsal lateral nucleus of the hypothalamus, dorsal lateral nucleus of the thalamus, dorsal ventricular ridge, habenula, lateral hypothalamus, nucleus rotundus, nucleus sphericus

Crews, David

292

An apparatus for high throughput muscle cell experimentation

  MIT - DSpace

Summary: The cardiac ventricular muscle cell (myocyte) is a key experimental system for exploring the mechanical properties of the diseased and healthy heart. The myocyte experimental model provides a higher level of physiological ...

Garcia-Webb, Michael G. (Michael Gregory)
2006-01-01

293

IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING, VOL. 55, NO. 1, JANUARY 2008 3 Computationally Efficient Strategy for Modeling the

  Biology and Medicine Websites

Summary: [3] and neurons [4], bursting in pancreatic B-cells [5], and excitability in cardiac ventricular-mail: buzzard@math.purdue.edu). Q. Zhou is with Gene Network Sciences, Ithaca, NY 14850 USA. Color versions

Rand, David G.

294

ARTICLE 1 -RECOGNITION Section 1: This agreement is made and entered into this 14th

  Engineering Websites

Summary: University Transplant Nurses Organization, hereinafter referred to as "OSUTNO," The Ohio State University Transplant Nurses Organization," hereinafter referred to as "OSUTNO" thirty (30) days after the signing in the following positions: Lung Transplant Coordinator Ventricular Assist Device Program Coordinator Heart


295

Isolation and characterization of neural progenitor cells from post-mortem human cortex.

  University of California eScholarship Repository

Summary: removal of the brain with cerebellum and brainstem intact, aexamination. The brain- stem and cerebellum were separatedbrain areas was cryopreserved: frontoparietal cortex, centrum semiovale, hippocampus, anterior ventricular wall, caudato-putamen, and cerebellum.

Schwartz, Philip H; Bryant, Peter J; Fuja, Tannin J; Su, Hailing; O'Dowd, Diane K; Klassen, Henry
2003-01-01

296

Spectral analyses of avian heart value sounds

  Texas A&M University - TxSpace

Summary: Cardiovascular changes which occur in response to cardiac stress affect the heart valve sounds (HVS). We attempted to quantify the effect of pulmonary hypertension and right ventricular (RV) hypertrophy on the frequency spectrum of HVS. A test...

Jeyaseelan, Prithika
1993-01-01

297

Integrin alpha 5 beta 1 is necessary for regulation of radial migration of cortical neurons during mouse brain development

  MIT - DSpace

Summary: During cerebral cortex development, post-mitotic neurons interact with radial glial fibers and the extracellular environment to migrate away from the ventricular region and form a correct laminar structure. Integrin receptors ...

Marchetti, Giovanni

298

An assay for permeability of the zebrafish embryonic neuroepithelium

  MIT - DSpace

Summary: The brain ventricular system is conserved among vertebrates and is composed of a series of interconnected cavities called brain ventricles, which form during the earliest stages of brain development and are maintained ...

Chang, Jessica T.

299

Mapping myocardial structure-function relations with cardiac diffusion and strain MRI

  MIT - DSpace

Summary: The myocardial structure-function relation is the key to understand the functional design of the ventricular myocardium. While the function of myocardial fibers has been extensively studied, the recently observed laminar ...

Dou, Jiangang, 1972-
2002-01-01

300

Three-dimensional spiral waves in an excitable reaction system: Initiation and dynamics of scroll rings and scroll ring pairs

  Chemistry Websites

Summary: problematic in systems such as the mammalian heart, which is nontransparent and in its entirety difficult to the heart, where rotating vortex structures are believed to cause cardiac ar- rhythmia and ventricular

Steinbock, Oliver

301

Zrich, den 30. Juni 2005 Bildungsdirektion

  Environmental Sciences and Ecology Websites

Summary: of the Bovine Jugular Vein Graft Used for Reconstruction of the Right Ventricular Outflow Tract" #12;Duméril in Vascular Smooth Muscle Cell: Potential Intracellular Mechanism(s)" Keyser Johanna Friederike, von

Zürich, Universität

302

Proc. Intl. Soc. Mag. Reson. Med 9 (2001) 1 Automated Segmentation of Cardiac Magnetic Resonance Images

  Mathematics Websites

Summary: - standard for cardiac imaging [1]. Measurement of ventricular volumes, muscle mass and function is based to generate synthetic images of the object in question (e.g. left ventricle). Segmentation: 1) The model


2001-01-01

303

The performance of a multiple-disk centrifugal pump as an artificial ventricle over a wide range of operating parameters 

  Texas A&M University - TxSpace

Summary: of the Cardiac Cycle Showing Changes in Pressures and Volumes Figure 4. Ventricular Assist Device Figure 5. Sac-type Artificial Hearts Figure 6. Piston/ Diaphragm Type Pumps Figure 7. Centrifugal Pumps Figure 8. The BioMedicus Pump Figure 9. The Meditronic... extracorporeal circulation, need ventricular assistance. The number of donor hearts that do meet all the requirements of size, shape, tissue type and other factors for a perfect match are incapable of filling the urgent and ever increasing demand. The five...

Sidhu, Amrita Singh
1993-01-01

304

Comparison of different contrast agents when imaging shape memory polymer foams 

  Texas A&M University - TxSpace

Summary: imaging can provide 3-D reconstruction of complete transmural cross sections of, for example, the ventricular wall [see Fig. 3(c)]. Multi-photon and confocal imaging routinely gives 500-nm resolution on soft tissues, although with the use of single...- ated by currents flowing out of the heart and into the thoracic cavity. The second (?organ?) row shows an MRI image of the heart in the torso, from which the endocardial and epicardial ventricular surfaces (second image) are segmented to produce...

Eagleston, Scott 1990-
2012-04-20

305

Measurements of the viscoelastic and heterogeneous response of the passive stage 18 embryonic chick heart 

  Texas A&M University - TxSpace

Summary: of contraction of the heart, especially that of the ventricles, that results in ejection of blood into the circulation. trabeculae ? strands of connective tissue, sometimes described as spiny projections, which exist in the heart. ventricular septum... system is not yet functional. CONCTRUNCUS ATRIUM LEFT VENTRICLE CONOTRUNCAL CUSHION RIGHT VENTRICLE SINUS VENOSUS ~ Y Y MICROSPHERES RIGHT VENTRICLE MUSCULAR VENTRICULAR SEPTUM MUSCULAR VENTRICULFR SEPTUM LEFT VENTRICLE ATRIUM Fig. 1I-4 (a...

Ling, Phyllis
2000-01-01

306

Cardiorespiratory effects of the intravenous administration of ketamine-midazolam in awake and isoflurane-anesthetized dogs 

  Texas A&M University - TxSpace

Summary: -diazepam, there were no significant changes in the cardiovascular variables (i. e. , HR, CO, MSBP, SVR, or PVR). Ketamine-diazepam in dogs with third degree heart block provided a safer induction (i. e. , absence of ventricular fibrillation or asystole) than... did not receive ketamine-midazolam. There were significant (P ( 0. 05) increases in heart rate, cardiac output, stroke volume, left and right ventricular stroke work indexes, and rate-pressure product over time. ACKNOWLEDGEME&KS This study...

Jacobson, John David
1990-01-01

307

The relationship of physical training and time components of the left ventricle 

  Texas A&M University - TxSpace

Summary: cZ, =d~ ad of Department Member mber May 1976 ABSTRACT The Relationship Between Physical Training and Left Ventricular T1me Components. (May 1976) Patrick Malton Bradley B. S. , Texas AIIM University Chairman of Advisory Committee: Dr..., and post-exercise values. The selected cardiac-cycle time components included. pre-ejection period (PEP); electromechanical lag (EML); isovolumetric contraction period (ICP); left ventricular ejection time (LVET); mechanical systole (MS); total systole...

Bradley, Patrick Walton
1976-01-01

308

Digitizing Vertebrate Brain Development with Ultrashort Pulse Microscopy 

  Texas A&M University - TxSpace

Summary: transitions to the maintenance phase that is accompanied by dramatic reshaping of the brain tissue and ventricular system, as well as production of cerebrospinal fluid that may itself contribute to MHB regulation (38, 39). Some would argue morphogenesis is a... (rhombomere boundaries, for example) while others, such as the MHB constriction, persist as structures in the adult brain that must resist increasing fluid pressure from the ventricular system (47). Using a similar computational approach, it was shown...

Gibbs, Holly C
2014-12-01

309

The chair`s vision The chair of Product Development

  Physics Websites

Summary: /Master Thesis Development of a fluid viscosity control system Project Ventricular Assist Devices (VADs) are blood pumps implanted in parallel to failing hearts. A test bench to evaluate VADs has been developed to be controlled and kept constant. Flow estimation algorithms that are nowadays used in VADs, instead of flow

Daraio, Chiara

310

CARDIOTHORACIC ANESTHESIOLOGY: The Annals of Thoracic Surgery CME Program is located online at http://cme.ctsnetjournals.org.

  Computer Technologies and Information Sciences Websites

Summary: that have re- ceived ventricular assist device (VAD) support, the crite- ria for identifying and selecting candidates who might be weaned from a VAD have not been established. Methods. A clinical decision support by retrospective clinical data from the 19 VAD patients con- sidered for weaning between 1996 and 2004. Artificial

Druzdzel, Marek J.

311

Freeing the LVAD patient from drivelines using wireless resonant electrical transfer. Benjamin Waters, Alanson Sample, Joshua Smith, Pramod Bonde

  Computer Technologies and Information Sciences Websites

Summary: , frictionless, single moving part has an advantage over earlier large pulsatile Ventricular Assist Devices (VAD side. Conclusion: A tether free operation of a VAD can be easily achieved by FREE-D system in room size distances. Besides improving quality of life it has the potential to make the VAD therapy more acceptable

Anderson, Richard

312

The influence of surface micro-structure on endothelialization under supraphysiological wall shear stress

  Materials Science Websites

Summary: generated within vascular assist devices (VADs) constitute a major challenge toward endothelialization. Here.e. ventricular assist devices; VADs) with the purpose of improving the quality of life and functional capacity- plantation of VADs. High flow rates within the device yielding supraphysiological wall shear stress (WSS

Daraio, Chiara

313

Visualization of embryonic neural stem cells using Hes promoters in transgenic mice

  Biology and Medicine Websites

Summary: Visualization of embryonic neural stem cells using Hes promoters in transgenic mice Toshiyuki stem cells proliferate in the ventricular zone (VZ) and sequentially give rise to both neurons and glial cells in a temporally and spatially regulated manner, suggesting that stem cells may differ from

McConnell, Susan

314

Autologous bone marrow cells and ischemic cardiomyopathy Jerome Roncalli1

  Physics Websites

Summary: : Intramyocardial stem cell injection in patients with ischemic cardiomyopathy: functional recovery and reverse of ischemic cardiomyopathy. A variety of adult stem and progenitor cells from different sources have already stem cells) in left ventricular scar and border zone improve regional contractility of a chronic

Paris-Sud XI, Université de

315

Database guided detection of anatomical landmark points in 3D images of the heart

  Computer Technologies and Information Sciences Websites

Summary: landmark points in 25 patients. The method can detect landmarks accurately in the four-chamber (apex: 7 (apex: 7.1±6.7mm, anterior mitral valve point: 5.8±3.5mm, inferior mitral valve point: 4.5±3.1mm. As a result, a method that detects left ventricular landmark points (apex, mitral valve hinge points


316

Downregulation of OPA1 alters mouse mitochondrial morphology, PTP function, and cardiac adaptation to pressure overload

  Computer Technologies and Information Sciences Websites

Summary: adaptation to pressure overload Running title: OPA1 deficit and cardiac mitochondria Jerome Piquereau1, 2 morphology of the Opa1+/- mitochondrial network; unexpectedly, mitochondria were larger with the presence of clusters of fused mitochondria and altered cristae. In permeabilized mutant ventricular fibers

Boyer, Edmond

317

Conf Proc IEEE Eng Med Biol Soc . Author manuscript Alfredo I. Hernandez

  Physics Websites

Summary: -synchronize the mechanical function of both ventricles. Previous clinical trials, have demonstrated the efficacy of CRT and postoperative phases. The objective of this paper is to evaluate the feasibility of the calculation of features ventricle (LV) at specific timings, so as to improve the ventricular filling phase and re

Paris-Sud XI, Université de

318

Analysis of endocardial acceleration during intraoperative optimization of cardiac resynchronization therapy

  Physics Websites

Summary: -synchronize the mechanical function of both ventricles. Previous clinical trials, have demonstrated the efficacy of CRT and postoperative phases. The objective of this paper is to evaluate the feasibility of the calculation of features) and the left ventricle (LV) at specific timings, so as to improve the ventricular filling phase and re

Paris-Sud XI, Université de

319

MRI predictors of cognitive outcome in early multiple sclerosis Mathilde S.A. Deloire1,2

  Physics Websites

Summary: Deloire 1 MRI predictors of cognitive outcome in early multiple sclerosis Mathilde S.A. Deloire1 tables. Keywords: Multiple sclerosis, Brain atrophy, Ventricular fraction, Cognition, Magnetic resonance for cognitive outcome in early relapsing remitting multiple sclerosis (MS) patients. Methods: Inception Cohort

Paris-Sud XI, Université de

320

Fig. 2. (a) Gross pathological slice and (b-d) MR images of ex vivo tissue. Fig. 1. DIR-FSE for collecting interleaved lipid-and water-only data.

  Engineering Websites

Summary: -FSE for collecting interleaved lipid- and water-only data. a b c da b c d Fig. 3. In vivo images of a patient diagnosed with ARVD. An Interleaved Lipid/Water Acquisition Method for Improved Detection of Lipid States Introduction: Arrhythmogenic right ventricular dysplasia (ARVD) is a condition characterized

Bilgin, Ali

321

The intercellular organization of the two muscular systems in the adult salmonid heart, the compact

  Environmental Sciences and Ecology Websites

Summary: the evolution of the vertebrate cardiovascular system and comparative aspects of cardiac physiology (Far- rell these two cardiac muscle architectures are attached to form a functional working unit. The present study generated during cardiac systole and permit a simultaneous, coordinated contraction of both ventricular

Farrell, Anthony P.

322

Universittsmedizin Gttingen Publikationen und Hochschulschriften 2010

  Biology and Medicine Websites

Summary: K, Schulze T, Eschenhagen T, Walsh K, Sam F (2011) Follistatin-like 1 in chronic systolic heart failure: a marker of left ventricular remodeling. CIRC- HEART FAIL, 4: 621-7. 3. El-Armouche A, Wittköpper, Mustafov L, Ten Freyhaus H, Kappert K, Odenthal M, Zimmermann WH, Tallquist MD, Rosenkranz S (2011

Gollisch, Tim

323

Introduction The epsilon 4 allele of the apolipoprotein E gene (APOE4) is a well-established risk factor for

  Biology and Medicine Websites

Summary: Introduction The epsilon 4 allele of the apolipoprotein E gene (APOE4) is a well-established risk40 gene, is also a more recently discovered risk factor for AD. TOMM40 lies close to the APOE gene expansion. However, so far, it is unknown how APOE4 and TOMM40 SNPs influence rates of ventricular expansion

Thompson, Paul

324

Hypoxia Regulates the Expression of the Adrenomedullin and HIF-1 Genes in Cultured HL-1 Cardiomyocytes

  Biology and Medicine Websites

Summary: Hypoxia Regulates the Expression of the Adrenomedullin and HIF-1 Genes in Cultured HL-1 previously that the expression of the adrenomedullin gene increases substantially in the developing rat heart and in cultured adult rat ventricular cardiac myocytes in response to hypoxia as a function of time

Wojcik, Edward J.

325

RICERCA SCIENTIFICA 2013 GRADUATORIA PROGETTI AWARDS COGNOME Nome MA TITOLO FIN. ATTRIB.

  Physics Websites

Summary: Zoccai Giuseppe B New insights in cardiac regeneration: breakthrough in left ventricular assist device (LVAD) and autologous stem cell combined therapy 60.000 Santoni angela B MOLECULAR MECHANISMS REGULATING Claudio A Design and development of methodologies for enantioselective separation and catalysis based

Guidoni, Leonardo

326

Analysis of the FentonKarma model through an approximation by a one-dimensional map

  Engineering Websites

Summary: -threatening diseases such as ventricular fibrillation ,,often the cause of sudden cardiac death... and developing ionic models of cardiac membrane that reproduces quantitatively many of the characteristics of heart admits different types of solutions corresponding to various dynamical behavior of the cardiac cell

Gauthier, Daniel

327

RICERCA SCIENTIFICA 2013 ELENCO FINANZIATI PROGETTI AWARDS COGNOME Nome MA TITOLO FIN. ATTRIB.

  Physics Websites

Summary: . Biondi Zoccai Giuseppe B New insights in cardiac regeneration: breakthrough in left ventricular assist REGULATING NK CELL ANTI-TUMOR ACTIVITY BY MULTIPLE MYELOMA MICROENVIRONMENT AND CHEMOTHERAPEUTIC AGENTS 60 Claudio A Design and development of methodologies for enantioselective separation and catalysis based

Guidoni, Leonardo

328

V. Cortical Development and Neural Disorder Fates and functions of NG2 cells in the postnatal CNS

  Biology and Medicine Websites

Summary: : Oligodendrocyte precursors (OLPs, also known as NG2 cells) are generated in the ventricular zones (VZ be induced to generate neurons as well as oligodendrocytes and astrocytes in culture, the idea developed overwhelmingly generate new myelinating oligodendrocytes during adulthood. Early reports that NG2 cells might

Kazama, Hokto

329

WILLIAM DAVID RICHARDSON PhD FLS FMedSci May 2010 August, 1951 in Belfast, Northern Ireland (UK citizen).

  Biology and Medicine Websites

Summary: .T., Richardson, W.D., and Raff, M.C. (1992). Cell death and control of cell survival in the oligodendrocyte expression in the dorsoventral axis of the neural tube may define the origin of the oligodendrocyte lineage expression of myelin genes: evidence for a focal source of oligodendrocyte precursors in the ventricular zone

Richardson, William D.

330

PULMONARY CIRCULATION AT EXERCISE R NAEIJE, MD, PhD and

  Engineering Websites

Summary: capillary pressures, up to a 20­25 mmHg threshold associated with interstitial lung edema and altered ventricular function limitation and altered gas exchange by interstitial lung edema. Pharmacological the limits of compensation, resulting in lung edema or right heart failure, or both. Since the essential

Chesler, Naomi C.

331

5-Hydroxytryptamine synthesis in HL-1 cells and neonatal rat cardiocytes

  Biology and Medicine Websites

Summary: in HL-1 cardiomyocytes and neonatal rat cardio- myocytes (MCs), not in NMCs. mRNAs of 5-HT2A receptor were detected in both MCs and NMCs, and those of 5-HT2B receptor in NMCs. These findings definitively [3 H]leucine uptake into neonatal Wistar rat ventricular cardiac myocytes (MCs) but failed to show

Wojcik, Edward J.

332

Use of neuroanatomical pattern regression to predict the structural brain dynamics of vulnerability and transition to psychosis

  Biology and Medicine Websites

Summary: and transition to psychosis Nikolaos Koutsouleris a, , Christian Gaser b , Ronald Bottlender a , Christos of these longitudinal brain changes in individual out-of training cases (HC vs ARMS: r=0.83, pb0.001; HC vs converters vs non-converters: r=0.83, pb0.001) by relying on baseline patterns that involved ventricular

Gaser, Christian

333

Receptor tyrosine phosphatase zeta/beta in astrocyte progenitors in the developing chick spinal cord

  Biology and Medicine Websites

Summary: chick spinal cord. RPTPZ/b was expressed throughout the ventricular zone (VZ) of the developing spinal a single ,9 kbp RPTPZ/b transcript expressed in the embryonic chick spinal cord, indicating that the shorter alternative-splice products of RPTPZ/b found in rodent spinal cord and brain

Richardson, William D.

334

Avoiding Local Minima for Deformable Curves in Image Analysis

  Mathematics Websites

Summary: an overview of part of our work over the past few years on snakes, balloons, and deformable models snakes for detecting the contour of Left Ventricular cavity of the heart in MR Images [10]. The main reserved. #12; 78 L. D. Cohen [14]. To recover more general 3D surfaces in 3D medical images, the snake

Cohen, Laurent

335

IEEE TRANSACTIONS ON MEDICAL IMAGING, VOL. 14, NO. 2, JUNE 1995 249 Estimation of Dynamically Evolving Ellipsoids

  Computer Technologies and Information Sciences Websites

Summary: ellipsoids from noisylower-dimensionalprojectionsis examined. In particu- lar, this work describes a model is modeled as a dynamicallyevolving three-dimensional (3-D) ellipsoid. The left-ventricular outline observed in the myocardial perfusion images is then modeled as a dynamic, two-dimensional (2-D) ellipsoid, obtained

Willsky, Alan S.

336

Enro.sagepub.com ISSN: 1073-8584

  Biology and Medicine Websites

Summary: serving as a passive scaffold for cell migration, have a remarkably diverse range of critical functions spinal cord (Golgi 1885). Further investigations by Magini focused on varicosities observed on the radial came further support for the idea of RG as a scaffold for neuronal migration from the ventricular zone

Ruthazer, Edward

337

New light on an old paradox: Site-dependent effects of carbachol on circadian rhythms

  Biology and Medicine Websites

Summary: as a regulator of mammalian circadian rhythms. When injected in vivo, cholinergics induced biphasic clock resolve this long-standing paradox. Whereas injection of the cholinergic agonist, carbachol ventricular injection, mediates the light- like cholinergic clock resetting reported previously. D 2005

Gillette, Martha U.

338

Condition for alternans and stability of the 1:1 response pattern in a ``memory'' model of paced cardiac dynamics

  Engineering Websites

Summary: demonstrate that the criterion can be evaluated readily in experiments using a simple pacing protocol, thus. In addition, a numerical experiment is performed using the three-current model to illustrate the application- opment of ventricular arrhythmias 1,2 , which often lead to sudden cardiac death. APD alternans can

Gauthier, Daniel

339

Surface-based TBM Boosts Power to Detect Disease Effects on the Brain: An N=804 ADNI Study Yalin Wang1, Yang Song2, Priya Rajagopalan3, Tuo An3, Krystal Liu3, YiYu Chou3,

  Mathematics Websites

Summary: associated with Alzheimer's disease (AD) and mild cognitive impairment (MCI) in 490 subjects (97 AD, 245 MCI, 148 controls) and ventricular differences in 804 subjects scanned as part of the Alzheimer's DiseaseSurface-based TBM Boosts Power to Detect Disease Effects on the Brain: An N=804 ADNI Study Yalin

Wang, Yalin

340

velocity probe andits evaluation," Cardiovascular Res., vol. 1, p. 263, 1967.

  Engineering Websites

Summary: dynamics during the Valsalva maneuver in normal man," in press, 1976. V O ~ .PGME-6, p. 259, 1959. Data ventricular ejection dynamics in man during rest and exercise,"American Heart Association Mono- (21] D.L. Fry. Triebwasser are with the Clinical Sciences Division of the United States Air ForceSchoolof Aerospace Medicine

Mitter, Sanjoy K.

341

Calcification of Porcine Aortic Valvular Interstitial Cells Liwen Gu1,2*

  Engineering Websites

Summary: and consists of 3 leaflets. Each leaflet contains outer endothelial layers and interstitial cells interspersed cases, bone formation within the interstitium of the leaflets. The endothelial cells on the ventricular that inhibitors of calcification such as osteoprotegerin (OPG) were less expressed by the endothelial cells

Simmons, Craig A.

342

Artif Intell Med. Author manuscript Model-based analysis of myocardial strain data acquired by tissue Doppler

  Computer Technologies and Information Sciences Websites

Summary: Objective Tissue Doppler Imaging (TDI) is commonly used to evaluate regional ventricular contraction model presents a tissue-level resolution, adapted to TDI strain analysis. The method is applied in order to reproduce TDI strain signals acquired from two healthy subjects and a patient presenting with Dilated

Boyer, Edmond

343

Abstract--This paper presents a model-based method for the analysis of regional myocardial strain, based on

  Computer Technologies and Information Sciences Websites

Summary: , based on echocardiography and Tissue Doppler Imaging (TDI). A multi- formalism, tissue Doppler Imaging (TDI) has been proposed as a non-invasive tool to quantify regional ventricular deformations, by estimating a set of regional myocardial strain signals [1]. TDI has been compared with other

Boyer, Edmond

344

Advanced Timing Cycles Advanced timing cycles

  Computer Technologies and Information Sciences Websites

Summary: · Prevents competitive atrial pacing · Atrial refractory period is added to prevent oversensing · PVARP is an atrial refractory period that occurs after a paced or sensed ventricular event · Prevents the atrial Adds PVARP 1000 ms (60 ppm)VOO RefractoryVVI VV VV VV VV VV VVA AV DelayDVI PVARPDDI V VV #12;Maximum

Smith, Spencer

345

Contrasting gray and white matter changes in preclinical Huntington disease

  Biology and Medicine Websites

Summary: Contrasting gray and white matter changes in preclinical Huntington disease An MRI study D-HD individuals had lower gross gray matter (GM) and white matter (WM) volume. Voxel-wise analysis demonstrated University of California at San Diego; VBM voxel-based morphometry; vCSF ventricular CSF; WM white matter

Aron, Adam

346

Supported by NIH NINDS NS 35115 (AVA) and NIA AG00940 (DRG)

  Biology and Medicine Websites

Summary: artifacts in the temporal lobes, it has a TR = 22 ms. · Total neocortical gray matter volumes were calculated after excluding the cerebellum, deep gray matter and brainstem. Normalized lateral ventricular gray matter volume was compared using a skull-based normalization (Sienax, FMRIB, Oxford, UK; Smith S

Apkarian, A. Vania

347

Activin A Promotes Progenitor Differentiation into Photoreceptors in Rodent Retina

  Biology and Medicine Websites

Summary: of the embry- onic nervous system. We used both in vitro and in vivo approaches to test for functions to be expressed widely in the developing nervous system. For example, activin A and activin B have been shown is found in the developing ventricular zone of the rat nervous system from E14 to E20). Both activin type

Reh, Thomas A.

348

3D Mapping of the Lateral Ventricles in Autism Christine N. Vidal MS, 4

  Biology and Medicine Websites

Summary: 3D Mapping of the Lateral Ventricles in Autism 1 Christine N. Vidal MS, 4 Emmanuelle Frenoux PhD, 2 ventricle abnormalities in autism. We first used manual segmentations to create statistical 3D maps, based. Ventricular volumes were mapped using a 3D distance field to measure the distance of each surface boundary

Thompson, Paul

349

Myocardial Structure and Function Differ in Systolic and Diastolic Heart Failure

  Biology and Medicine Websites

Summary: Myocardial Structure and Function Differ in Systolic and Diastolic Heart Failure Loek van Heerebeek, MD, PhD Background--To support the clinical distinction between systolic heart failure (SHF) and diastolic heart failure (DHF), left ventricular (LV) myocardial structure and function were compared in LV

Linke, Wolfgang A.

350

Intravenous Lidocaine Versus Intravenous Amiodarone (in a New

  Biology and Medicine Websites

Summary: -Aqueous Investigators* The effectiveness of intravenous amiodarone for the treatment of incessant (shock resistant) ventricular tachy- cardia (VT) has not been established. This study evalu- ated the efficacy of a water-soluble amiodarone prepa- ration or lidocaine for the treatment of shock-resistant VT. The trial was a double


351

Cognitive Neuroscience Phylogeny of the cortex

  Biology and Medicine Websites

Summary: of pyramidal cells. Evolution of the neocortex led to the present-day layered neocortex, which is similar of cortical pyramidal cells lengthen with neocorticalization. The pyramidal cells with soma in the deepest "units", with their base in the germinal zone of the ventricular wall. Migration of the pyramidal cells

Bressler, Steven L.

352

Original Research Single-Breathhold, Four-Dimensional, Quantitative

  Engineering Websites

Summary: Function Using Triggered, Real-Time, Steady-State Free Precession MRI in Heart Failure Patients Girish (LV) and right ventricular (RV) function in heart failure patients. Materials and Methods: A total of 20 heart failure patients (mean age 59 17 years) underwent scanning with our new, real-time, spiral

Southern California, University of

353

Am. J. Hum. Genet. 69:13781384, 2001 A Missense Mutation in a Highly Conserved Region of CASQ2 Is

  Biology and Medicine Websites

Summary: of syncope, seizures, or sudden death, in response to physical activity or emotional stress. Two modes by physical activity or cat- echolamine infusion (fig. 1), which can rapidly deteri- orate into ventricular fibrillation. Patients present with recurrent syncope and/or seizures or sudden death fol- lowing physical

Lancet, Doron

354

J. theor. Biol. (1990) 146, 407-432 Chaotic Dynamics in an Ionic Model of the Propagated Cardiac

  Biology and Medicine Websites

Summary: Action Potential TIMOTHY J. LEWlSt~ AND MICHAEL R. GUEVARA Department of Physiology and Centre of ventricular muscle by numerically integrating the one-dimensionalcable equation using the Beeler-Reuter model of iteration of the map and the results of the numerical integration of the cable equation. Calculation

Guevara, Michael R.
1990-01-01

355

Evaluation and implications of natural product use in preoperative patients: a retrospective review

  University of Kansas - KU ScholarWorks

Summary: ; ventricular arrhythmias with halothane; long-term uses depletes endogenous catecholamines and may cause intraoperative hemodynamic instability; life- threatening interaction with MAOI's At least 24 hours before surgery Garlic Inhibition of platelet... aggregation, increased fibrinolysis, equivocal antihypertensive activity Potential to increase risk of bleeding, especially when combined with other medications that inhibit platelet aggregation At least 7 days before surgery Ginkgo Inhibition of platelet...

King, Allison R.; Russett, Flint S.; Generali, Joyce A.; Grauer, Dennis W.
2009-10-13

356

Cardiovascular Research 1983;17:243-250 Effects of low [K+

  Physics Websites

Summary: ; tetrodotoxin; arrhythmia. SUMMARY Ventricular and Purkinje action potentials were recorded oscillations of potential appeared at rest. In Purkinje cells, increasing concentrations of tetrodotoxin from tetrodotoxin and local anaesthetics) also depress the steady-state ("window") sodium current 10 11 and shorten

Paris-Sud XI, Université de

357

JOURNAL OF EXPERIMENTAL ZOOLOGY 290:751758 (2001) 2001 WILEY-LISS, INC.

  Environmental Sciences and Ecology Websites

Summary: Expression in the Red, White, and Ventricular Muscle of Juvenile Stages of Rainbow Trout FRANCES E. WEAVER, show differences in red muscle contractile properties: parr red muscle has faster kinetics and a faster maximum shortening velocity than smolt red muscle. A developmental reduction in the number of MHC isoforms

Coughlin, David J.
2001-01-01

358

Regulated Nuclear Trafficking of the Homeodomain Protein Otx1 in Cortical Neurons

  Biology and Medicine Websites

Summary: Regulated Nuclear Trafficking of the Homeodomain Protein Otx1 in Cortical Neurons Y. Alex Zhang,1 in the rat ventricular zone, and remains cytoplasmic as neurons migrate and begin to differentiate. Nuclear, that the N-terminus of Otx1 is nec- essary for nuclear import, and that a putative nuclear localization

McConnell, Susan

359

doi:10.1152/ajpheart.01400.2007 294:1753-1766, 2008. First published Feb 8, 2008;Am J Physiol Heart Circ Physiol

  Engineering Websites

Summary: -duration ventricular fibrillation in dogs Chemical ablation of the Purkinje system causes early termination://ajpheart.physiology.org/cgi/content/full/294/4/H1753 can be found at:AJP - Heart and Circulatory PhysiologyaboutAdditional material of the heart, blood vessels, andAJP - Heart and Circulatory Physiology onOctober26,2008ajpheart

MacLeod, Rob S.

360

Sedmera Vvoj komorovho myokardu Funkce orgnu je podmnna jeho strukturou. Toto tvrzen nabv zvlstn vznam u srdce, jez je jednm

  Computer Technologies and Information Sciences Websites

Summary: development, and during its morphogenesis must support the circulatory demands of the growing organism in the adult heart. Ventricular conduction system serves above all the coordinated spread of electrical and functional deployment of the various components of cardiac conuction system in the chick embryo, including

Tebbens, Jurjen Duintjer

361

Study of Pressure Estimation for a Human Circulatory System with a LVAD

  Engineering Websites

Summary: Study of Pressure Estimation for a Human Circulatory System with a LVAD Yi Wu1 , Paul Allaire2. Based on the state space model of human circulatory system, the mean aortic pressure can be estimated-invasive evaluation of left ventricular function and properties of human circulatory system. Keywords: Cardiovascular

Wu, Yi

362

Structural correlates of psychopathological symptom dimensions in schizophrenia: A voxel-based morphometric study

  Biology and Medicine Websites

Summary: , temporal and limbic regions as well as the ventricular system. Despite this sub- stantial progress compared to controls were identified within the prefrontal, limbic, paralimbic, temporal and thalamic as limbic and subcortical structures. Thus, structural heterogeneity in schizophrenia may relate to specific

Gaser, Christian

363

POSTER PRESENTATION Open Access 4D flow-sensitive MR estimation of pulmonary

  Engineering Websites

Summary: Background Pulmonary arterial hypertension (PAH) is characterized by progressive increase in pulmonary ventricular (RV) function in PAH. Deter- mining PVR from MRI could enable a more complete characterization of RV and PA interactions in PAH. The purpose of this study was to non-invasively estimate PVR from TRV

Chesler, Naomi C.

364

Artificial Organs 29(5):378386, Blackwell Publishing, Inc.

  Biology and Medicine Websites

Summary: --Thrombus deposition--Wall shear rates. Penn State's 70cc pneumatic left ventricular assist device (LVAD) has been transplant opportunities. The recent REMATCH study (1) found that the LVAD is superior to drug therapy down the 70cc Penn State LVAD to a 15cc pediatric model, however, have proven unsuccessful, as a result

Manning, Keefe B.

365

Steven W. Day1 e-mail: sday@alumni.virginia.edu

  Environmental Sciences and Ecology Websites

Summary: , Charlottesville, VA 22903 PIV Measurements of Flow in a Centrifugal Blood Pump: Time-Varying Flow Measurements of the time-varying flow in a centrifugal blood pump operating as a left ventricular assist device (LVAD to identify the effects that the transient nature of the flow field will have on blood damage. Although

Day, Steven

366

Three-dimensional panoramic imaging of cardiac arrhythmias in rabbit heart

  Biology and Medicine Websites

Summary: Three-dimensional panoramic imaging of cardiac arrhythmias in rabbit heart Fujian Qu Crystal M of propagating electrical waves during ventricular arrhythmias and the termination of arrhyth- mias by strong, and arrhythmias. The recorded spatiotemporal dynamics of electrical activity is texture mapped onto


367

PROOF COPY 007704JBO Three-dimensional panoramic imaging of cardiac

  Biology and Medicine Websites

Summary: arrhythmias in rabbit heart Fujian Qu Crystal M. Ripplinger Vladimir P. Nikolski Washington University ventricular arrhythmias and the termination of arrhyth- mias by strong electric shocks. Panoramic imaging hearts n=18 during normal sinus rhythm, epicardial pacing, and arrhythmias. The recorded spatiotemporal

Grimm, Cindy

368

Result: Pacemakers drift to attractors Integral of the excitation variable u along

  Biology and Medicine Websites

Summary: excitable ventricular tissue to study mechano-electrical feedback and arrhythmias Martyn P. Nash1, Rikkert H arrhythmias. Progress in Biophysics and Molecular Biology, 82(1­3): 1­266, 2003. [4] MP Nash & AV Panfilov. Electromechanical model of excitable tissue to study reentrant cardiac arrhythmias. Progress in Biophysics

Utrecht, Universiteit

369

THREE DIMENSIONAL PANORAMIC FAST FLUORESCENCE IMAGING OF CARDIAC ARRHYTHMIAS IN THE RABBIT HEART

  Biology and Medicine Websites

Summary: THREE DIMENSIONAL PANORAMIC FAST FLUORESCENCE IMAGING OF CARDIAC ARRHYTHMIAS IN THE RABBIT HEART the dynamics of propagating waves of excitation during ventricular arrhythmia and defibrillation. However, epicardial pacing, and arrhythmias. The reconstructed 3D electrical activity provides us with a powerful tool

Grimm, Cindy

370

J Cell Mol Med . Author manuscript Cardiac cell therapy: overexpression of connexin43 in skeletal myoblasts

  Computer Technologies and Information Sciences Websites

Summary: in skeletal myoblasts and prevention of ventricular arrhythmias Sarah Fernandes 1 , Harold V.M. Van Rijen 2 reported that cardiac engraftment of connexin43-overexpressing myoblasts prevents post-infarct arrhythmia vector encoding connexin43. In contrast to Roell s report, arrhythmia occurrence was not statistically

Boyer, Edmond

371

Lidocaine Converts Acute Vagally Associated Atrial Fibrillation to Sinus Rhythm in German Shepherd Dogs with Inherited Arrhythmias

  Physics Websites

Summary: Dogs with Inherited Arrhythmias R. Pariaut, N.S. Moi¨se, B.D. Koetje, J.A. Flanders, S.A. Hemsley, T frequently used to treat ventricular arrhythmias. However, lidocaine may have an antiar- rhythmic effect for certain supraventricular arrhythmias. Hypothesis: We hypothesized that lidocaine would be effective

Otani, Niels F.

372

Norbert Marwan (marwan@agnld.uni-potsdam.de), Niels Wessel (niels@agnld.uni-potsdam.de) In this study new developed

  Physics Websites

Summary: of ventricular tachy-arrhythmias (VT) in patients with an implanted cardioverter- defibrillator based on heart and a radius of 110. The RP before a life-threatening arrhythmia is charac- terized by big black rectangles tachy-arrhythmias (VT) in patients with an implanted cardioverter-defibrillator (PCD 7220

Seehafer, Norbert

373

DownloadedBy:[UniversiteitMaastricht]At:13:0216May2007 FULL LENGTH RESEARCH ARTICLE

  Biology and Medicine Websites

Summary: exacerbate into lethal arrhythmias. Hibernating species are protected against these arrhythmias by a non threatening arrhythmias (Kle´ber and Rudy 2004). Cooling hearts of rabbits or humans eventually causes conduction block or ventricular arrhythmias (Johansson 1996; Fedorov et al. 2005). The heart

Barnes, Brian McRae

374

Measuring the acoustoelectric interaction constant using ultrasound current source density This article has been downloaded from IOPscience. Please scroll down to see the full text article.

  Biology and Medicine Websites

Summary: associated with arrhythmias. (Some figures may appear in colour only in the online journal) 1. Introduction Cardiac catheter ablation has evolved to be a standard clinical treatment for arrhythmia. The procedure, consequently, not able to detect non-sustained arrhythmias (e.g., ventricular tachycardia) (Duru 2002, Markides

Witte, Russell S.

375

In The News Thursday, Oct. 28, 2010

  Biology and Medicine Websites

Summary: , the Total Artificial Heart is currently approved as a bridge to human heart transplant for people dying from Diego (UCSD), led by Stuart W. Jamieson, M.B., F.R.C.S. (photo), Head of Cardiothoracic Surgery the faculty in July (see also ). "One of my main goals is to help support the heart transplant and ventricular

Arizona, University of

376

Multifunctional Interventional Devices for MRI: A Combined Electrophysiology/MRI Catheter

  Biology and Medicine Websites

Summary: tachycardias, AV-nodal reentrant tachycardias, ac- cessory pathways, atrial flutter, and idiopathic ventricular for arrhythmias such as atrial flutter and fibrillation. Second, cardiac motion and flow dynamics can be monitored that require continuous lines of ablation, such as treatment for atrial flutter, atrial fibrillation

Atalar, Ergin

377

Arterial biomechanics and the influences of pulsatility on growth and remodeling 

  Texas A&M University - TxSpace

Summary: for a period of 5 to 8 weeks that allows anticipated full remodeling; this procedure has been used previously to study left ventricular hypertrophy in mice [51-54]. The right common carotid artery after banding (RCCA-B) experiences a marked increase...

Eberth, John Francis
2009-05-15

378

Existence of Bistability and Correlation with Arrhythmogenesis in Paced Sheep Atria

  Biology and Medicine Websites

Summary: atrial and ventricular fibrillation. Such understanding can augment development of effective, wherein 1:1 and 2:1 responses existed at the same T^. In 15 trials and in all animals, idiopathic, tbe idiopathic wavefronts occurred at I'^s witbin tbe histabitity window or witbin 35 msec of its

Bahar, Sonya

379

Control of myocyte remodeling in vitro with engineered substrates

  Biology and Medicine Websites

Summary: - tween the shape of ventricular myocytes and contractile function have been reported by Gerdes and colleagues (Gerdes and Capasso 1995; reviewed in Gerdes 2002). Commonly, myocyte shape and size serve) observed by Gerdes and colleagues. In this study, we asked whether the size and cytoskeletal architecture

Parker, Kevin Kit

380

Curriculum Vitae Elisabetta Cerbai

  Biology and Medicine Websites

Summary: . Differentiation. 2007;75:669-81. 8. Cerbai E, Sartiani L. Holt­Oram Syndrome and Atrial Fibrillation: Opening. Belus A, Piroddi N, et al. Effects of chronic atrial fibrillation on active and passive force generation and relaxation in single myofibrils from human atrial and ventricular myocardium. Pflugers Arch. 2007 Apr;454

Guidoni, Leonardo

381

S160 Heart Rhythm Vol 4, No.5 May Supplement 2007 DIFFUSION TENSOR MAGNETIC RESONACE IMAGING OF THE

  Biology and Medicine Websites

Summary: preparation showed highly organized fibre structures in atrial and ventricular parts of the tissue computer models of the electrical excitation in the human heart. PO2-51 MOTHER ROTOR FIBRILLATION an important role in mother rotor fibrillation in which a stable rotor acts as a periodic driving source

Utrecht, Universiteit

382

A surface-based electrophysiology model relying on asymptotic analysis and motivated by cardiac atria modeling

  Mathematics Websites

Summary: -frequency ablation which aims at treating cardiac arrythmias ­ e.g., atrial fibrillation ­ by blocking some abnormal.g. [14, 13, 17, 2] and references therein. Given the frequent occurrence of pathologies ­ such as atrial fibrillation and ventricular tachycardia ­ directly affecting electrophysiology, hence impairing cardiac


383

Mechanisms of Fibrillation: Neurogenic or Myogenic? Reentrant or Focal? Multiple or Single?: Still Puzzling After 160 Years of

  Biology and Medicine Websites

Summary: Mechanisms of Fibrillation: Neurogenic or Myogenic? Reentrant or Focal? Multiple or Single?: Still, St. Louis, Missouri, USA The mechanisms of initiation and maintenance of ventricular fibrillation (VF" or fibrillation to emphasize the myogenic nature of the process that he had observed. A former student of Ludwig


384

1570 ieee transactions on ultrasonics, ferroelectrics, and frequency control, vol. 55, no. 7, july 2008 Multifunctional Catheters Combining

  Engineering Websites

Summary: outcomes. Recent reports have shown procedural improvements for atrial fibrillation using ICE integrated and Interventional Procedures in Electrophysiology Atrial fibrillation (AF), the most common cardiac dys- rhy, and strain rate imaging of atrial and ventricular structures. The companion paper of this work discusses

Khuri-Yakub, Butrus T. "Pierre"

385

Atria are more susceptible to electroporation than ventricles: Implications for atrial stunning, shock-induced arrhythmia and

  Biology and Medicine Websites

Summary: for early recurrence of atrial fibrillation. METHODS We investigated electroporation induced by 10-ms epi Electroporation; Atrial stunning; Conduction block; Atrial fibrillation; Optical mapping; Defibrillation (Heart is an effective therapy against atrial fibril- lation (AF) and ventricular fibrillation (VF). However, de- spite


386

Conditions for propagation and block of excitation in an asymptotic model of atrial tissue

  Mathematics Websites

Summary: and in the development and the self-perpetuation of atrial and ventricular fibrillation [2­5]. So it is importantConditions for propagation and block of excitation in an asymptotic model of atrial tissue Radostin model of human atrial tissue in order to obtain a reduced but accurate model for the description

Biktashev, Vadim N.

387

Conditions for propagation and block of excitation in an asymptotic model of atrial tissue

  Mathematics Websites

Summary: and in the development and the self­perpetuation of atrial and ventricular fibrillation [2--5]. So it is importantConditions for propagation and block of excitation in an asymptotic model of atrial tissue Radostin model of human atrial tissue in order to obtain a reduced but accurate model for the description

Biktashev, Vadim N.

388

Genetic manipulation of adult mouse neurogenic niches by in vivo electroporation

  Chemistry Websites

Summary: , Harald Mikkers1,3 & Jonas Frise´n1 Targeted ectopic expression of genes in the adult brain niches without detectable brain damage. Injection of plasmid DNA into the ventricular system or directly electroporation provides a new approach to study the adult brain. The development of transgenic animal technology1

Cai, Long

389

Interleukin-18 Is a Pro-hypertrophic Cytokine That Acts through a Phosphatidylinositol 3-Kinase-Phosphoinositide-dependent Kinase-

  Biology and Medicine Websites

Summary: IL-18 effects revealed that IL-18 activates phosphoinositide 3-kinase (PI3K), an effect gene transcription via PI3K, PDK1, Akt, and GATA4. Most importantly, IL-18 induced ANF gene transcription and hypertrophy of neonatal rat ventricular myocytes via PI3K-, Akt-, and GATA4- dependent

Wojcik, Edward J.

390

RESEARCH Open Access Semi-automatic algorithm for construction of the

  Biology and Medicine Websites

Summary: time-averaging and wavelet-based denoising, edge enhancement filtering, morphological operations performed by manual segmentation of the ventricular cavity in a series of dynamic images. This process-axis images during diastole is troublesome, because of the opening of the mitral valve. Methods: This work

Carvalho, João Luiz

391

To appear in the proceedings of IPMI 2001 The Active Elastic Model

  Biology and Medicine Websites

Summary: elastic model is designed to be used to solve a problem of the following form: `Given an input of noisy variability of the deformation to be estimated. We test this model on the problem of left ventricular estimation. More recently, similar models have been applied to the problem of brain deformation during

Duncan, James S.

392

Morohogen`ese cardiaque Cardiac morphogenesis

  Mathematics Websites

Summary: -ventricular tube. We will consider that the cell proliferation is due only to shear stress exerted by the blood proliferation is due to shear stress exerted by the blood flow. We note that many experimental studies prove of the boundary V (, t) depend on the shear stress exerted by the blood flow. the shear stress can be writen u n

Nouaili, Nejla

393

Fax +41 61 306 12 34 E-Mail karger@karger.ch

  Biology and Medicine Websites

Summary: ;73:26­42 DOI: 10.1159/000202988 Pyloric Neuron Morphology in the Stomatogastric Ganglion of the Lobster microscopy Crustacea Alexa dyes Stomatogastric Panulirus Morphology Lobster Abstract The pyloric network stomatogastric ganglion stn stomatogastric nerve VD ventricular dilator (neuron) #12;Lobster (Panulirus) Pyloric

Hooper, Scott

394

289:398-413, 2005. First published Feb 11, 2005; doi:10.1152/ajpheart.00683.2004AJP -Heart Brigitte Pelzmann, Bernd Koidl and Michael R. Guevara

  Biology and Medicine Websites

Summary: Brigitte Pelzmann, Bernd Koidl and Michael R. Guevara Trine Krogh-Madsen, Peter Schaffer, Anne D. Skriver, Louise Kold Taylor, of embryonic chick ventricular cells An ionic model for rhythmic activity in small Krogh-Madsen,1,2 Peter Schaffer,3 Anne D. Skriver,1,2 Louise Kold Taylor,1,2 Brigitte Pelzmann,3 Bernd

Guevara, Michael R.

395

European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS 2012)

  Engineering Websites

Summary: as well as diseased hearts, and in doing so, may reveal the significance of flow structures on ventricular specific models (e.g. [14,26]) and will eventually assist with the diagnosis and treatment of heart disease for the diagnosis and treatment for the heart dis- eases. Therefore for the better interpretation

Mittal, Rajat

396

Cardiac-specific overexpression of SCN5A gene leads to shorter P wave duration and PR interval in transgenic mice

  Biotechnology Websites

Summary: in SCN5A and linked to a number of heart diseases including long QT syndrome (LQTS), Brugada syndrome (Br, heart rate, QRS duration, and QT intervals remained unchanged in TG-WT mice. Moreover, no spontaneous ventricular arrhythmias were detected in TG-WT hearts. Despite these results, a mild, irregular cardiac


397

Accelerated Communication Selective Enhancement of -Adrenergic Receptor Signaling by

  Biology and Medicine Websites

Summary: . Pertussis toxin treatment failed to reveal an enhancement by AC6 overexpression of basal or PGE2-stimulated form of AC expressed in mammalian heart, on G protein-coupled receptor regulation of cAMP production in neonatal rat ventricular myo- cytes. Following gene transfer of AC6, isoproterenol- and for- skolin-stimulated

Ostrom, Rennolds

398

Evaluation of aortic compliance in humans HELMUT F. KUECHERER,1 ARMIN JUST,2 AND HARTMUT KIRCHHEIM2

  Biology and Medicine Websites

Summary: and conducts pulsatile ventricular output (7) and contributes mostly to total compliance of the arterial tree properties assumes that the arterial tree is an elastic chamber (windkessel) in which the diastolic pressure decays exponentially with a time constant that is determined by total arterial resistance and compliance

Just, Armin

399

Changes in Large Pulmonary Arterial Viscoelasticity in Chronic Pulmonary Hypertension

  Materials Science Websites

Summary: Changes in Large Pulmonary Arterial Viscoelasticity in Chronic Pulmonary Hypertension Zhijie Wang1, Wisconsin, United States of America Abstract Conduit pulmonary artery (PA) stiffening is characteristic of pulmonary arterial hypertension (PAH) and is an excellent predictor of mortality due to right ventricular

Lakes, Roderic

400

RESEARCH Open Access Consistency of aortic distensibility and pulse

  Physics Websites

Summary: Herment1 Abstract Background: Arterial stiffness is considered as an independent predictor afterload, which can cause left ventricular hypertrophy [3]. Arterial stiffness is recognized as a major and pulse wave velocity (PWV) are com- monly used to characterize the arterial stiffness [12

Paris-Sud XI, Université de

401

POSTER PRESENTATION Open Access Towards a new method for cardiac tissue velocity

  Physics Websites

Summary: solution [2]. In this study, we used a central k-space line phase contrast sequence [3] to acquire real sequence modified to acquire only the central k-space line was used in a mid- ventricular small axis scan Figure 1 (a) Placement of small axis plane (green) and frequency direction (red). (b) Time-space display

Paris-Sud XI, Université de

402

Although it is well known that fish increase cardiac output (Q) during exercise to meet increased metabolic demands,

  Environmental Sciences and Ecology Websites

Summary: .e., cardiac preload (= central venous pressure, PCV). Ventricular end-systolic volume, at least in rainbow of increasing Vs. This line of logic ignores the fact that under steady-state conditions, Q equals venous return of Biologists 2005 doi:10.1242/jeb.01606 Cardiac preload (central venous pressure, PCV), mean circulatory

Farrell, Anthony P.

403

Journal of Biomechanics 37 (2004) 12631269 Reassessment of brain elasticity for analysis of

  Mathematics Websites

Summary: Journal of Biomechanics 37 (2004) 1263­1269 Reassessment of brain elasticity for analysis-dimensional finite element model of the human brain/ventricular system is developed and analysed under hydrocephalic loading conditions. It is shown that the Young's modulus of the brain parenchyma used in previous studies

Frey, Pascal
2004-01-01

404

Neurology . Author manuscript MRI predictors of cognitive outcome in early multiple sclerosis

  Physics Websites

Summary: brain magnetic resonance imaging (MRI) including magnetization transfer (MT) imaging at baseline and two testing included the Brief Repeatable Battery (BRB). Imaging parameters included lesion load, brain parenchyma fraction, ventricular fraction (VF), mean MT ratio (MTR) of lesion and normal appearing brain

Paris-Sud XI, Université de

405

Endogenous circadian rhythm in an index of cardiac vulnerability independent of changes in behavior

  Physics Websites

Summary: correlations scaling Adverse cardiac events are the leading cause of mortality in the United States (1 from scheduled behav- iors and mean heart rate. Cardiac dynamics under pathologic condi- tions infarction (2­6), stroke (7, 8), angina (9), ventricular arrhythmias (10), and sudden cardiac death (11, 12

Stanley, H. Eugene

406

Electron-conformational transformations in nanoscopic RyR channels govern both the heart's contraction and beating

  CERN Preprints

Summary: We show that a simple biophysically based electron-conformational model of RyR channel is able to explain and describe on equal footing the oscillatory regime of the heart's cell release unit both in sinoatrial node (pacemaker) cells under normal physiological conditions and in ventricular myocytes under Ca$^{2+}$ SR overload.

Moskvin, A S; Solovyova, O E; Markhasin, V S
2011-01-01

407

Quantification of Gastric Mill Network Effects on a Movement Related Parameter of Pyloric Network Output in the Lobster

  Biology and Medicine Websites

Summary: extract gastric mill timed variations in pyloric motor neuron firing, and consequently produce gastric) and Ventricular Dilator (VD) neuron OSF was visually apparent. Averaged data showed that VD and LP neuron OSF Cardiac (IC), Pyloric Dilator (PD), and Pyloric (PY) neurons. However, when averaged as a function

Hooper, Scott

408

HeAT: A Software Assistant for the Analysis of LV Remodeling after Myocardial Infarction

  Computer Technologies and Information Sciences Websites

Summary: of left ventricular (LV) remod- eling extracting regional and global parameters in the acute (base- modeling is characterized by wall thinning, chamber dilation and increased end-diastolic and end by hand is time-consuming and in most cases not reproducible. The computer-assisted extraction

Lübeck, Universität zu

409

Quantification of Cardiac Sac Network Effects on a Movement-Related Parameter of Pyloric Network Output in the Lobster

  Biology and Medicine Websites

Summary: not been quantified. Some pyloric muscles extract cardiac sac timed variations in pyloric motor neuron. The ventricular dilator (VD) neuron had a biphasic re- sponse, with its OSF first increasing and then decreasing of cardiac sac activity. The pyloric dilator (PD) neurons had a triphasic response, with OSF increasing

Hooper, Scott

410

Bulletin of Mathematical Biology (2008) 70: 13261347 DOI 10.1007/s11538-008-9301-x

  Biology and Medicine Websites

Summary: ARTICLE A Model for Mechano-Electrical Feedback Effects on Atrial Flutter Interval Variability Michela-to-beat variability, which has been suggested to be related to ventricular contraction and respiration by mechano-electrical. These results constitute evidence in favor of mechano-electrical feedback as a major source of cycle length

Glass, Leon
2008-01-01

411

Towards High Resolution Computational Models of the Cardiac Conduction System: A Pipeline

  Computer Technologies and Information Sciences Websites

Summary: and pathophysiology of the heart. Experimental research has focused mainly on investigating the electrical properties of the Purkinje-ventricular-junctions (PVJs). The structure of the PVJs has only been described through schematic to conduct electric impulses at higher speed than working myocardium[1]. Corresponding author. D.N. Metaxas

Geffner, Hector

412

INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN BIOMEDICAL ENGINEERING Int. J. Numer. Meth. Biomed. Engng. 2013; 29:83103

  Mathematics Websites

Summary: .com). DOI: 10.1002/cnm.2497 Structure-based finite strain modelling of the human left ventricle in diastole Lab, School of Aerospace Engineering, Xi'an Jiaotong University, Xi'an 710049, People's Republic, and are associated with conditions including left ventricular hypertrophy and dia- betes. The clinical significance

Luo, Xiaoyu

413

Predicting Postoperative Atrial Fibrillation from Independent ECG Components Chih-Chun Chia, James Blum, Zahi Karam, Satinder Singh, Zeeshan Syed

  Computer Technologies and Information Sciences Websites

Summary: , and Stevenson 2001; Asher et al. 1998). In PAF, the upper chambers (atria) of the heart fibrillate or contract rapidly and irregularly, preventing successful emptying of blood into the lower (ventricular) chambers that this effect may be due to differences in ion-channel expression and hormonal ef- fects on autonomic tone

Baveja, Satinder Singh

414

Gene expression pattern Sox-9 and cDachsund-2 expression in the developing chick telencephalon

  Biology and Medicine Websites

Summary: Gene expression pattern Sox-9 and cDachsund-2 expression in the developing chick telencephalon; accepted 19 November 2001 Abstract The expression patterns of the transcription factor, Sox-9 expressed in the ventricular zone and in the subventricular zone of the telencephalon during the period

Tabin, Cliff

415

Surface Multivariate Tensor-based Morphometry on Premature Neonates: A Pilot Study

  Mathematics Websites

Summary: anatomy of subcortical structures between healthy preterm and term-born neonates. We first reconstruct become possible to detect and track how neurological disorders affects brain anatomy, and in particular the anatomy of subcortical structures. For example, hippocampal and #12;ventricular surface morphology have

Wang, Yalin

416

Efficient Modeling of Excitable Cells Using Hybrid Automata

  Computer Technologies and Information Sciences Websites

Summary: biological systems. Our goal is to efficiently capture the behavior of excitable cells previously modeledEfficient Modeling of Excitable Cells Using Hybrid Automata Pei Ye1 , Emilia Entcheva2 , Radu Grosu-Huxley model of the giant squid axon, the Luo-Rudy dynamic model of a guinea pig ventricular cell, and a model

Grosu, Radu

417

MAPPING NEURODEGENERATION USING MULTI-ATLAS FLUID IMAGE ALIGNMENT

  Biology and Medicine Websites

Summary: MAPPING NEURODEGENERATION USING MULTI-ATLAS FLUID IMAGE ALIGNMENT Yi-Yu Chou1 , Natasha Leporé1 al. Automated Ventricular Mapping with Multi-Atlas Fluid Image Alignment Reveals Genetic Effects affecting progression from MCI or normal aging to AD, we developed a brain mapping technique to map

Thompson, Paul

418

*Author to whom correspondence should be addressed. E-mail: keener@math.utah.edu.

  Computer Technologies and Information Sciences Websites

Summary: currents in every cell. These cur- rents hyperpolarize the cell membrane at one end of the cell of cardiac ventricular electrical activity. This e!ectiveness results from early hyperpolarization and depolarize the cell membrane at the other end, giving rise to a microscopic &&saw- tooth'' variation

Lewis, Timothy

419

Data Fusion of Left Ventricle Electro-Anatomic Mapping and Multislice Computerized Tomography for Cardiac Resynchronisation Therapy

  Physics Websites

Summary: for Cardiac Resynchronisation Therapy Optimization F Tavard1,2 , A Simon1,2 , C Leclercq1,2,3 , P Mabo1, France Abstract Cardiac Resynchronization Therapy is a treatment for bi-ventricular asynchronism. It can. Introduction Nowadays, Cardiac Resynchronization Therapy (CRT) is accepted as a therapeutic option in heart

Paris-Sud XI, Université de

420

MATHEMATICAL BIOSCIENCES 10.3934/mbe.20xx.xx.xx AND ENGINEERING

  Mathematics Websites

Summary: heart heavily relies on the coordination between several different excitable tissues. In normal network is isolated from the muscle except at its endpoints that are connected to the ventricular wall into account the microstructure of the tissue. In such a context the main issue is to properly write

Coudière, Yves

421

PreparticipationPhysicalEvaluation HISTORYFORM

  Biology and Medicine Websites

Summary: or atlantoaxial instability? (Down syndrome or dwarfism) 22. Do you regularly use a brace, orthotics, or other infant death syndrome)? 14. Does anyone in your family have hypertrophic cardiomyopathy, Marfan syndrome, arrhythmogenic right ventricular cardiomyopathy, long QT syndrome, short QT syndrome, Brugada syndrome

Borenstein, Elhanan

422

This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research

  Biology and Medicine Websites

Summary: , gender, and educational level. In statistical maps ranked by effect sizes, ventricular differences were to the author for internal non-commercial research and education use, including for instruction at the authors School of Medicine, Los Angeles, CA, USA b Department of Radiology and Children's Hospital Los Angeles

Thompson, Paul

423

ORIGINAL ARTICLES Three-Dimensional Mapping of Temporo-Limbic

  Biology and Medicine Websites

Summary: in schizophrenia patients versus controls. Ventricular enlargements, pronounced in the left hemisphere, occurred systems in schizophrenia. Alterations in these structures as mapped in 3D may provide the foundation systems, suggesting that different neurobiological mechanisms are involved, resulting from polygenetic in

Thompson, Paul

424

Accurate Measurement of Normal Vectors of the Heart from MRI Data Using Variational Calculus

  Computer Technologies and Information Sciences Websites

Summary: of wall thickness, which is a very impor- tant parameter in assessing ventricular function. In this work function from geometry, ac- curate information about wall thickness and principal curvatures 9) geometry of the heart, which allows, in particu- lar, more accurate measurement of wall thickness than

Rachidi, Tajje-eddine

425

600 1996 by Excerpta Medica, Inc. 0002-9149/96/$15.00 All rights reserved. PII S0002-9149(96)00377-3

  Computer Technologies and Information Sciences Websites

Summary: velocities recorded by trans- thoracic Doppler ultrasound: relation to left ventricular diastolic pressures from the trans- ducer in the apical 4-chamber view, PV flow assess- ment by pulsed Doppler TTE in some cases. Intravenous injection of sonicated albumin pro- vides enhancement of the Doppler flow

Ohlsson, Mattias

426

Importing Ontologies with Hidden Content Bernardo Cuenca Grau and Boris Motik

  Computer Technologies and Information Sciences Websites

Summary: ontologies are used, for example, in several countries to describe electronic patient records (EPR). Patients, an EPR application should preferably reuse these reference ontologies. For example, assume that a reference ontology Kh describes concepts such as the "ventricular septum defect." An EPR appli- cation might

Grau, Bernardo Cuenca

427

Import-by-Query: Ontology Reasoning under Access Limitations Bernardo Cuenca Grau, Boris Motik, and Yevgeny Kazakov

  Computer Technologies and Information Sciences Websites

Summary: (EPR). In such a system, patients' data typically involves ontological descriptions of human anatomy interoperability between applica- tions, and rely on experts' knowledge, an EPR application should preferably reuse such as the "ventricular septum defect." An EPR application might reuse the concepts and roles from Kh to define its own

Grau, Bernardo Cuenca

428

IEEE TRANSACTIONS ON IMAGE PROCESSING, VOL. 9, NO. 4, APRIL 2000 651 Multiframe Temporal Estimation of Cardiac Nonrigid

  Engineering Websites

Summary: of Cardiac Nonrigid Motion John C. McEachen, II, Member, IEEE, Arye Nehorai, Fellow, IEEE, and James S motion of the left ventricular (LV) endocardial wall in image sequences has been developed. This system is unique in its ability to model motion trajectories across multiple frames. The foundation of this system

Nehorai, Arye

429

AUTOMATIC GENERATION OF NOISE-FREE TIME-ACTIVITY CURVE WITH GATED BLOOD-POOL

  Physics Websites

Summary: [1]. TRVG permits simultaneous measurement at equilibrium of right and left ventricular ejection fractions, volumes and outputs, regurgitant fractions, and regional wall motion in addition to phase of a segmented ventricle, including evaluation of local ejection fractions (EF) and time of end systole (TES

Paris-Sud XI, Université de

430

This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research

  Materials Science Websites

Summary: Keywords: Dgcr8 DiGeorge miRNA microRNA Cardiac neural crest Outflow tract DiGeorge syndrome (DGS of congenital heart defects. DiGeorge critical region 8 (Dgcr8), a gene that maps to the common deletion region persistent truncus arteriosus (PTA) and ventricular septal defect (VSD). Interestingly, Dgcr8-null c

Hornstein, Eran

431

Preclinical evaluation of an 18 F-labelled 1-adrenoceptor selective

  Biology and Medicine Websites

Summary: in patients with some types of heart disease, including hypertrophic cardiomyopathy, idiopathic right ventricular outflow tract tachycardia and arrhythmogenic Available online at www.sciencedirect.com Nuclear) in cardiac disease which may or may not be associated with a decrease in 2-ARs. We have chosen ICI 89

Shen, Jun

432

1450 IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING, VOL. 58, NO. 5, MAY 2011 Dynamic Brain Phantom for Intracranial

  Engineering Websites

Summary: 1450 IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING, VOL. 58, NO. 5, MAY 2011 Dynamic Brain Phantom--Knowledge of intracranial ventricular volume is im- portant for the treatment of hydrocephalus, a disease in which cere from the enlarged ventricles and a dynamic vol- ume decrease was properly recorded. This method

Linninger, Andreas A.

433

doi:10.1016/S0301-5629(03)00952-9 Original Contribution

  Engineering Websites

Summary: , such as left ventricular or biventricular pacing for the treatment of congestive heart failure, have shown; in final form 8 April 2003) Abstract--We have developed dual lumen probes incorporating a forward-viewing of atrial septal defects. These procedures require monitoring of cardiac function, such as cardiac output

Smith, Stephen

434

JAVMA, Vol 241, No. 1, July 1, 2012 Scientific Reports 89 SMALLANIMALS/

  Biology and Medicine Websites

Summary: --Retrospective cohort study. Animals--27 client-owned cats (16 male and 11 female) with heart failure, treated and survival time in cats with heart failure characterized by ventricular systolic dysfunction. Design sev- eral cardiac medications. Types of heart disease represented included unclassified cardio

Boggess, May M.

435

636 IEEE TRANSACTIONS ON IMAGE PROCESSING, VOL. 16, NO. 3, MARCH 2007 A Hybrid EulerianLagrangian Approach

  Computer Technologies and Information Sciences Websites

Summary: ], and decreased thickness may be related to Alzheimer's disease [8]­[11] and anorexia nervosa [12]. In the heart636 IEEE TRANSACTIONS ON IMAGE PROCESSING, VOL. 16, NO. 3, MARCH 2007 A Hybrid Eulerian ventricular myocardium, which is intrinsically annular when viewed from cross sec- tion images such as those

Prince, Jerry L.

436

Real-Time Color-Flow Magnetic ResonanceImaging of Congenital Heart Disease E. De La Pena-Almaguer, K. S. Nayak, M. Terashima, P.C. Yang,

  Engineering Websites

Summary: in atrial and ventricular septal defects as well as extra-cardiac flow abnormalities. This is a promisingReal-Time Color-Flow Magnetic ResonanceImaging of Congenital Heart Disease E. De La Pena used for the diagnosis of congenital heart disease (CHD), although it has limitations. Conventional MRI

Southern California, University of

437

Automatic Boundary Evolution Tracking via a Combined Level Set Method and Mesh Warping

  Computer Technologies and Information Sciences Websites

Summary: in some clinical cases of hydrocephalus [13], whereas shunt failure happens in over 60% of patients [16. In this paper, we automatically detect the ventricular boundary evolution for 2D CT images. To help surgeons de is a neurological disease which causes ven- tricular dilation due to abnormalities in the cerebrospinal fluid (CSF

Shontz, Suzanne M.

438

2768 IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING, VOL. 55, NO. 12, DECEMBER 2008 Taser Blunt Probe Dart-To-Heart Distance Causing

  Multidisciplinary Databases and Resources Websites

Summary: of the current needed to cause VF in guinea pig isolated hearts, and concluded that the evidence argued against Dart-To-Heart Distance Causing Ventricular Fibrillation in Pigs Jiun-Yan Wu, Student Member, IEEE (VF), was measured in pigs. A 9-mm-long blunt probe was advanced snugly through the surrounding

Sheridan, Jennifer

439

letters to nature NATURE |VOL 405 |1 JUNE 2000 |www.nature.com 575

  Biotechnology Websites

Summary: -Jones, R. D. Role of bicarbonate in pH recovery from intracellular acidosis in the guinea-pig ventricularH in the smooth muscle of guinea-pig ureter: Na+ dependence. J. Physiol. 479, 301±316 (1994). 5. Schwiening, C. J

Murray, J.A.H.

440

Neuron, Vol. 36, 10511061, December 19, 2002, Copyright 2002 by Cell Press Paracrine Intercellular Communication by a

  Biology and Medicine Websites

Summary: of the neocortical ventricular zone (Lo Turco et al., 1995). If transmittersSummary mediate intercellular are mediated by a nonconventional release of transmitters, as they persist in the presence synaptic currents are present already in utero and may provide a source of transmitter (Rozenberg et al.,1989; Superporters

Cossart, Rosa

441

ORAL PRESENTATION Open Access Non-invasive assessment of interstitial myocardial

  Physics Websites

Summary: in pressure-overload left ventricular hypertrophy Andrew Jabbour1* , Tevfik F Ismail1 , Sofia V De Noronha4 information is available at the end of the article Jabbour et al. Journal of Cardiovascular Magnetic Resonance 2012, 14(Suppl 1):O5 http://www.jcmr-online.com/content/14/S1/O5 © 2012 Jabbour et al; licensee Bio

Paris-Sud XI, Université de

442

doi:10.1152/ajpheart.01300.2005 291:H184-H192, 2006. First published 24 February 2006;Am J Physiol Heart Circ Physiol

  Biology and Medicine Websites

Summary: , Matthew W. Kay, Valentin Krinsky and Narine Sarvazyan Interaction between spiral and paced waves of excitable media Phase-resolved analysis of the susceptibility of pinned spiral waves to far-field pacing-energy defibrillation shock is the only therapy for ventricular tachyarrhythmias. However, be- cause of adverse side


443

Neuron, Vol. 17, 5561, July, 1996, Copyright 1996 by Cell Press Restriction of Late Cerebral Cortical Progenitors

  Biology and Medicine Websites

Summary: , upper-layer is less well characterized. Here, we explore the mech- progenitors were transplanted their developmental potential experimentally, upper-layer progenitor cellswere transplanted back intoThe mammalian cerebral cortex is organized into layers the ventricular zone of younger host brains, during theof neurons

McConnell, Susan

444

INTRODUCTION As the structure responsible for the highest levels of cognitive

  Biology and Medicine Websites

Summary: , the cerebral cortex has been an intensely scrutinized target of scientific investigation. The organization in an organized manner (McConnell, 1988a). Neurons are generated in the ventricular zone (VZ), then migrate their terminal mitotic divisions and migrate from the VZ to the cortical plate at similar times. Transplantation

McConnell, Susan

445

Circulation . Author manuscript Effects of HIV protease inhibitors on progression of monocrotaline-and

  Physics Websites

Summary: monocrotaline injection (60 mg/kg) substantially diminished pulmonary artery pressure, right ventricular- and hypoxia-induced PH in rats by downregulating the Akt pathway, thereby inhibiting pulmonary-artery smooth hypertrophy, number of muscularized pulmonary vessels, pulmonary arterial wall thickness, and proliferating

Paris-Sud XI, Université de

446

Eur J Heart Fail . Author manuscript The cardiac renin-angiotensin system is responsible for high-salt

  Physics Websites

Summary: affects not only arterial pressure but also left ventricular mass and cardiac fibrosis in hypertensive NaCl) and HS plus irbesartan (50 mg/kg/day) or% % ramipril (1 mg/kg/day). After 8 weeks, arterial pressure was similar in all groups and similar to baseline, whereas LV/body weight ratio was higher in HS

Paris-Sud XI, Université de

447

Acta Biotheor . Author manuscript A Tissue-Level Electromechanical Model of the Left Ventricle: Application

  Physics Websites

Summary: are encouraging for the application of the model on non-invasive data like ECG, arterial pressure or myocardial Ventricle: Application to the Analysis of Intraventricular Pressure Le Rolle Virginie 1 * , Carrault Guy 1 The ventricular pressure profile is characteristic of the cardiac contraction progress and is useful to evaluate

Paris-Sud XI, Université de

448

Interactive and Multi-modal Visualization for Neuroendoscopic Interventions?

  Computer Technologies and Information Sciences Websites

Summary: . This blockage leads to a dangerous increase of brain pressure which can damage the brain severely. Other problems include the formation of a CSF-filled cyst which also introduces pressure on blood vessels, nerves, or the ventricular (cerebral) aqueduct. To avoid these dangerous increases of pressure inside of the skull, the cyst

Bartz, Dirk

449

CIRCULATIONAHA/2010/973750 Effects of HIV Protease Inhibitors on Progression of Monocrotaline-and

  Computer Technologies and Information Sciences Websites

Summary: artery pressure, right ventricular hypertrophy, number of muscularized pulmonary vessels, pulmonary inhibiting pulmonary-artery smooth-muscle-cell (PA-SMC) proliferation. Methods and Results: Daily treatment arterial wall thickness, and proliferating pulmonary vascular Ki67-labeled cells, without affecting vessel

Boyer, Edmond

450

ISSN: 1524-4571 Copyright 2006 American Heart Association. All rights reserved. Print ISSN: 0009-7330. Online

  Physics Websites

Summary: , but no changes in systemic arterial pressure. PH worsened with age. Except a marked decrease in Kv channels Hamon, Serge Adnot, Saadia Eddahibi Abstract--One intrinsic abnormality of pulmonary artery smooth, SM22­5-HTT mice exhibited PH, with marked increases in right ventricular systolic pressure (RVSP

Paris-Sud XI, Université de

451

Noninvasive electromechanical wave imaging and conduction velocity estimation in vivo

  Engineering Websites

Summary: : 1) sinus rhythm (SR) (natural pacing), 2) right-atrial (RA) pacing and 3) right-ventricular (RV) pacing. Pacing was achieved using a nine-electrode catheter and catheterization through the right side along the posterior wall starting at the S-wave of the ECG, which occurs after Purkinje and during

Konofagou, Elisa E.

452

Zrich, 30. September 2006 PROMOTIONSLISTE

  Environmental Sciences and Ecology Websites

Summary: ,,Effect of Aging on Expression of Sex Steroid Receptors in the Male Cardiovascular System" Celeiro" Cominelli Silvano Giovanni, von/in Zürich ,,Impact of Associated Coronary Artery Disease on Left Ventricular criteria for differentiation of Fabry disease from amyloid heart disease and other causes of left

Zürich, Universität

453

ESTIMATING MECHANICAL PROPERTIES OF THE HEART USING DYNAMIC MODELING AND MAGNETIC RESONANCE IMAGING

  Engineering Websites

Summary: ESTIMATING MECHANICAL PROPERTIES OF THE HEART USING DYNAMIC MODELING AND MAGNETIC RESONANCE IMAGING mechanical properties of the heart using magnetic resonance imaging (MRI) tissue-tagging and blood pres- sure, in vivo heart. Clinically, they may be useful for developing ventricular function measures with sufficient

Nehorai, Arye

454

Figure 1: Left ventricle endo-surface segmentation meshes were dissected into two halves, the septum

  Computer Technologies and Information Sciences Websites

Summary: , the septum (on the left) and the free wall (on the right). (a) is from a normal heart, and (b) is from a diseased heart. SHAPE ANALYSIS OF THE LEFT VENTRICULAR ENDOCARDIAL SURFACE AND ITS APPLICATION IN DETECTING *Piedmont Heart Institute, Atlanta, Georgia 30309, USA Introduction The complex 3D geometrical structure

Bhandarkar, Suchendra "Suchi" M.

455

Evolution of a Non-Invasive Method for Providing Assistance to the Heart

  Engineering Websites

Summary: Evolution of a Non-Invasive Method for Providing Assistance to the Heart H. S. Soroff, MD and J. Rastegar The primary function of the ventricular chambers of the heart is to provide the proper volume, in the first part of the cardiac cycle, when the heart is relaxed, cardiac diastole, the device exerts

Webster III, Robert James

456

UNIVERSITE MONTPELLIER II Dpartement des Sciences Mathmatiques

  Engineering Websites

Summary: cardiovascular biomechanics and more precisely the numerical simulation of heart support devices such as Ventricular Assist Devices or artificial hearts. The long-term objective is the optimization of such devices typical of an actual artificial organ such as the Carmat heart. The post-doctoral fellow will be part

Mendez, Simon

457

Analysis of a Non-linear Partial Difference Equation, and

  Engineering Websites

Summary: States is catastrophic disturbances in electrical rhythms in the heart [7]. Ventricular fibrillation, a particularly lethal phenomenon, consists of the heart being totally ineffectual at pumping blood due to disorganized irregular patterns of electrical activity in the heart. The electrical patterns of excitation

Rand, Richard H.

458

Boundary Element Analysis of Intracardiac Electrogram Sensing

  Mathematics Websites

Summary: of electrical signals is essential to proper functioning of the heart. Action potentials in the heart cause begins in the sino­atrial node above the atria and flows across the heart from the right atrium and ventricles; it is propagated to the bottom of the heart, and finally it radiates throughout the ventricular


459

In Vitro Evaluation of Multiobjective Hemodynamic Control of a Heart-Assist Pump

  Engineering Websites

Summary: In Vitro Evaluation of Multiobjective Hemodynamic Control of a Heart-Assist Pump KWAN-WOONG GWAK§ Ventricular assist devices now clinically used for treatment of end-stage heart failure require responsive simulator using a HeartQuest centrifugal blood pump (CF4b, MedQuest Products, Salt Lake City, UT). To avoid

Paden, Brad

460

Luca Gentili e-mail: l.gentili@unibo.it

  Engineering Websites

Summary: of a Maglev Artificial Heart This paper is devoted to the development of an advanced controller for a maglev artificial heart: in particular, a magnetically levitated left ventricular assist device is studied and the disturbances from the natural heart are taken into account. The main goal is to define a control action able

Paden, Brad

461

Electron-conformational transformations in nanoscopic RyR channels govern both the heart's contraction and beating

  Condensed Matter (arXiv)

Summary: We show that a simple biophysically based electron-conformational model of RyR channel is able to explain and describe on equal footing the oscillatory regime of the heart's cell release unit both in sinoatrial node (pacemaker) cells under normal physiological conditions and in ventricular myocytes under Ca$^{2+}$ SR overload.

A. S. Moskvin; A. M. Ryvkin; O. E. Solovyova; V. S. Markhasin
2011-03-31

462

CLINICAL RESEARCH Heart failure/cardiomyopathy

  Biology and Medicine Websites

Summary: RESEARCH Heart failure/cardiomyopathy Preserved left ventricular twist and circumferential deformation, but depressed longitudinal and radial deformation in patients with diastolic heart failure Jianwen Wang, Dirar SBakey Heart Center, The Methodist Hospital, Houston, TX 77030-2717, USA Received 27 September 2007; revised 15

Duncan, James S.

463

Name: dhr. prof. dr. J.R. Lahpor Cardiothoracic surgery

  Biology and Medicine Websites

Summary: Medicine Department Division of Heart and Lung Contact details Telephone (+31) 88 755 6179 E-mail address j ventricular assist device: a functional comparison with heart transplantation; Pruijsten R.V., de Jonge N., Kirkels J.H., Klopping C., Doevendans P.A., Ooosterom A., Kemperman H., Lahpor J.R. Neth Heart J 2008

Utrecht, Universiteit

464

Eur Heart J . Author manuscript Chronic heart rate reduction with ivabradine improves systolic function of

  Physics Websites

Summary: Eur Heart J . Author manuscript Page /1 11 Chronic heart rate reduction with ivabradine improves systolic function of the reperfused heart through a dual mechanism involving a direct mechanical effect the adaptations of left ventricular function and calcium handling to chronic heart rate reduction with ivabradine

Paris-Sud XI, Université de

465

Mutations in the Fatty Acid 2-Hydroxylase Gene Are Associated with Leukodystrophy

  Biology and Medicine Websites

Summary: with Spastic Paraparesis and Dystonia Simon Edvardson,1,2 Hiroko Hama,5 Avraham Shaag,1 John Moshe Gomori,3 spasticity, dystonia, cognitive dysfunction, and peri- ventricular white matter disease revealed inactivating. When they were 7­12 years of age, their spasticity extended to the upper limbs. Dystonia was evi- dent

Hsu, Yi-Te

466

Concept Visualization Descriptor Details

  Computer Technologies and Information Sciences Websites

Summary: Multi-layer Perceptron Artificial Neural Network with a single hidden layer and learning rate = 0, Shape analysis of left ventricular endocardial surface and its application in detecting coronary artery endocardial surface morphology and the incidence and extent of stenosis in a specific coronary artery

Bhandarkar, Suchendra "Suchi" M.

467

Original article Effect of dietary polyunsaturated fatty acids

  Computer Technologies and Information Sciences Websites

Summary: of the left ventricular function were determined. Feeding fish oil markedly reduced the proportion of n-6) Abstract -- Moderate physical training induced a decrease in arterial blood pressure in fish oil-fed rats-purified diet containing either 10% sunflower seed oil or 10% fish oil (EPAX 3000TG, Pronova). Each dietary

Boyer, Edmond

468

Optical Action Potential Upstroke Morphology Reveals Near-Surface Transmural Propagation Direction

  Biology and Medicine Websites

Summary: ) test theoretical predictions experimentally in isolated coronary-perfused swine right ventricular preparations. We show in numerical simulations that by suitable placement of linear epicardial stimulating on . A similar relationship was found in simulations with epicardial point stimulation. The optical mapping data

Vetter, Frederick J.

469

Epicardial Fiber Organization in Swine Right Ventricle and Its Impact on Propagation

  Engineering Websites

Summary: coronary-perfused right ventricular free wall preparations (n 8) stained with the voltage-sensitive dye di computer model to simulate the electrical activation and voltage-dependent optical signals. In all-shaped activation fronts with two axes of fast conduction. Computer simulations accurately predicted the features

Vetter, Frederick J.

470

The role of M cells and the long QT syndrome in cardiac arrhythmias: Simulation studies of reentrant excitations using a detailed

  Materials Science Websites

Summary: activity of the heart is thought to subsequently lead to ventricular fibrillation, the leading cause Department of Physics, Center for Theoretical Biological Physics, University of California, San Diego, La of the long QT syndrome. © 2004 American Institute of Physics. DOI: 10.1063/1.1636272 Spatial heterogeneity

Henry, Hervé

471

DATABASE GUIDED DETECTION OF ANATOMICAL LANDMARK POINTS IN 3D IMAGES OF THE HEART

  Computer Technologies and Information Sciences Websites

Summary: classifiers in a coarse to fine scheme. The method can detect landmarks accurately in the four-chamber (apex: 7.9±7.1mm, mitral valve center: 4.8±2.3mm) and two-chamber (apex: 7.1±6.7mm, mitral valve center: 5 for automatic detection of left ventricular land- marks (apex, mitral valve) would be of great importance


472

Blood pressure and red blood cell magnesium, potassium, and calcium responses to dietary fats

  Texas A&M University - TxSpace

Summary: -term diuretic treatment, who were suffering from congestive heart failure and were being treated for arterial HTN, and who presented with symptoms of ventricular ectopic beats, did not respond to potassium infusion alone. Rather, magnesium infusion led... renal diuretic and saliuretic effects and renal vasodilation (109). In fact, Comberg and coworkers had speculated that renin and aldosterone activity may also be involved in the effect that polyunsaturated fats, the PG precursors, have on blood...

Wehrman, Noreen Elaine
1993-01-01

473

Hypercholesterolemia and dietary compliance

  Texas A&M University - TxSpace

Summary: lead to heart failure or to sudden death associated with ventricular arrhythmias (6). Atherosclerosis is generally positively related to the severity of hypercholesterolemia. Low density lipoprotein (LDL) cholesterol is more atherogenic than high... density lipoprotein (HDL) cholesterol, which is thought protective against atherosclerosis and, thus, CHD (8, 9). Recent studies have shown that high levels of LDL cholesterol in circula- tion may also lead to thrombosis by affecting platelet func...

Person, Judith Fredricka
1988-01-01

474

The use of Technetium-99m stannous pyrophosphate imaging as an index of myocardial infarction 

  Texas A&M University - TxSpace

Summary: - cardial necrosis to extensive multifocal subacute myo- cardial degeneration and necrosis. The total area of affected myocardium was an indication of the progression of the cardiomyopathy. Electrocardiographic observations are indicated in Table 3. A.... Histopathological observations There are a few tiny foci of myocyte degeneration within the ventricular myocardium. There are several fairly large zones of myocyte necrosis within one atria. ECG observations Less than . 5 mm S-T deviation from the isoelectric...

Sanford, Jeffrey Clayton
1981-01-01

475

Entropy Index as a Measure of Heartbeat Irregularity

  Nuclear Theory (arXiv)

Summary: A method is proposed to analyze the heartbeat waveform that can yield a reliable characterization of the structure after only a few pulses. The measure suggested is entropy index that is related to the one found effective in describing chaotic behaviors in a wide variety of physical systems. When applied to the ECG data that include ventricular fibrillation, the index is shown to change drastically within a few pulses. Wavelet analysis is used to exhibit different scaling behaviors in different phases.

Rudolph C. Hwa
1998-09-29

476

Bi-plane video-based determination of strains in arterial bifurcations 

  Texas A&M University - TxSpace

Summary: Puhnonarp Artetny Aorta 'NX~' ' !!'i '1 Lefrt Auricle I le " ' *' s (beneath) Figure Itch Left-side vrew demonstrattng the branch geometry and the anatonucal location It is well known that the left ventricular surface twists about its longitudinal... laid down concentrically. The SMCs are surrounded by an extracellular network of collagen (mainly types I, III, and IV), elastin fibrils, as well as proteoglycans suspended in an aqueous matrix. SMCs are spindle-shaped and arranged side...

Everett, William Neil
2002-01-01

477

Periostin and Osterix Expression in Odontogenic and Non-Odontogenic Bone Lesions 

  Texas A&M University - TxSpace

Summary: : PMC3205268. Epub 2011/10/15. eng. 45. Naik PK, Bozyk PD, Bentley JK, Popova AP, Birch CM, Wilke CA, et al. Periostin promotes fibrosis and predicts progression in patients with idiopathic 30 pulmonary ibrosis. American Journal of Physiology Lung..., Sargent MA, et al. Genetic manipulation of periostin expression reveals a role in cardiac hypertrophy and ventricular remodeling. Circulation Research. 2007 Aug 3;101(3):313-21. PubMed PMID: 17569887. Pubmed Central PMCID: PMC2680305. Epub 2007...

Trump, Bryan Glen
2014-04-24

478

Exercise training regulation of extracellular matrix and remodeling in the aging rat heart 

  Texas A&M University - TxSpace

Summary: in increased collagen accumulation, elevated internal work, heart stiffness and contributes to diastolic or systolic dysfunction and ventricular remodeling (127). However, the precise mechanisms that lead toward increased fibrosis in the aging heart remain....g., fibril-forming collagens and non-fibril forming collagens), glycoproteins (e.g., fibronectins, elastin, laminins, vitronectin, etc), proteoglycans, extracellular proteases, and ECM receptors (5, 33, 47). ECM in the heart is linked to cellular...

Kwak, Hyo Bum
2009-05-15

479

Feather release force and rigor mortis development in soft-scaled broilers stunned with carbon dioxide or electricity 

  Texas A&M University - TxSpace

Summary: , while Mohan Raj et al. (1990b) used a high amperage to induce ventricular fibrillation or high gas concentration to kill the broilers. The former study also used a batch stunning system, while the present study used a shackle-line stunning system... and eases feather picking. The effect of CO2 on feather release force is not well known, especially at concentrations that induce unconsciousness and does not induce heart fibrillation to kill the birds. Currently, more research is needed to characterize...

Krupala, Jason Kyle
1998-01-01

480

Action of manganese on puberty 

  Texas A&M University - TxSpace

Summary: , other CNS lesions or familial disease, with less than 10% being idiopathic. In girls, however, it is much different with over 65% being idiopathic with no identifiable cause. There must be some underlying pathophysiological causes and any substance... of LHRH receptor antagonism on Mn-induced LH release Third ventricular and external jugular cannulae were implanted as described above. The next day, an extension of tubing was attached to each cannula and flushed with heparinized saline (100 IU...

Lee, Bo Yeon
2007-09-17

481

Limit cycles by FEM for a one - parameter dynamical system associated to the Luo - Rudy I model

  CERN Preprints

Summary: An one - parameter dynamical system is associated to the mathematical problem governing the membrane excitability of a ventricular cardiomyocyte, according to the Luo-Rudy I model. Limit cycles are described by the solutions of an extended system. A finite element method time approximation (FEM) is used in order to formulate the approximate problem. Starting from a Hopf bifurcation point, approximate limit cycles are obtained, step by step, using an arc-length-continuation method and Newton's method. Some numerical results are presented.

Bichir, C?t?lin Liviu; Amuzescu, Bogdan; Nistor, Gheorghe; Popescu, Marin; Flonta, Maria-Luiza; Corlan, Alexandru Dan; Svab, Istvan
2011-01-01

482

CHEST OriginalResearch PULMONARYVASCULAR DISEASE

  Engineering Websites

Summary: the maximal tricuspid regur- gitation jet velocity. Cardiac index was calculated from the left ventricular(5):1158­1165 Abbreviations: a5distensibility coefficient; CO5cardiac output; LAP5left atrial pressure; mPAP5mean pulmo- naryPAP-CO relationships was 1.5 0.5 mm Hg/L/min, and the distensi- bility coefficient (a) was 1.3% 1.0%/mm Hg. Maximal

Chesler, Naomi C.

483

A tissue-level electromechanical model of the left ventricle: Application to the analysis of

  Physics Websites

Summary: for the application of the model on non-invasive data like ECG, arterial pressure or myocardial strain. Keywords of intraventricular pressure. Virginie Le Rolle 1, 2 , Guy Carrault1, 2 , Pierre-Yves Richard 3 , Philippe Pibarot4;57(4):457-478" DOI : 10.1007/s10441-009-9092-y #12;2 2 Abstract: The ventricular pressure profile is characteristic

Paris-Sud XI, Université de

484

Spatiotemporal dynamics of pacing in models of anatomical reentry

  Nonlinear Sciences (arXiv)

Summary: Reentry around non-conducting ventricular scar tissue, which often causes lethal arrhythmias, is typically treated by rapid stimulation from an implantable defibrillator. However, the mechanisms of termination (success and failure) are poorly understood. To elucidate such mechanisms, we studied pacing of anatomical reentry in 1-D and 2-D excitable cardiac media models. Our results suggest that the existence of inhomogeneity in the reentry circuit is essential for pacing termination of tachycardia to be successful. Considering the role of such inhomogeneities may lead to more effective pacing algorithms.

Sitabhra Sinha; David J. Christini
2001-07-30

485

A study on the cardiovascular physiology of the goat

  Texas A&M University - TxSpace

Summary: and the 8-T wave followed the basal line. The Q-T interval was 0. 26 second. The end of the T wave was basically simultaneous with the second sound. The heart sounds were of sgorter duration and simpler than in large animals. The first sound was composed... is coincident with early ventricular systole and occurs with or a little after the QRS wave. Therefore, the first sound is associated with the QRS wave and occurs during or just after the R wave of the EKG. The second heart sound is associated...

Ahmad, Alauddin
1964-01-01

486

Functional data analytic approach of modeling ECG T-wave shape to measure cardiovascular behavior

  CERN Preprints

Summary: The T-wave of an electrocardiogram (ECG) represents the ventricular repolarization that is critical in restoration of the heart muscle to a pre-contractile state prior to the next beat. Alterations in the T-wave reflect various cardiac conditions; and links between abnormal (prolonged) ventricular repolarization and malignant arrhythmias have been documented. Cardiac safety testing prior to approval of any new drug currently relies on two points of the ECG waveform: onset of the Q-wave and termination of the T-wave; and only a few beats are measured. Using functional data analysis, a statistical approach extracts a common shape for each subject (reference curve) from a sequence of beats, and then models the deviation of each curve in the sequence from that reference curve as a four-dimensional vector. The representation can be used to distinguish differences between beats or to model shape changes in a subject's T-wave over time. This model provides physically interpretable parameters characterizing T-wave sh...

Zhou, Yingchun; 10.1214/09-AOAS273
2010-01-01

487

ECG beats classification using waveform similarity and RR interval

  CERN Preprints

Summary: This paper present an electrocardiogram (ECG) beat classification method based on waveform similarity and RR interval. The purpose of the method is to classify six types of heart beats (normal beat, atrial premature beat, paced beat, premature ventricular beat, left bundle branch block beat and right bundle branch block beat). The electrocardiogram signal is first denoised using wavelet transform based techniques. Heart beats of 128 samples data centered on the R peak are extracted from the ECG signal and thence reduced to 16 samples data to constitute a feature. RR intervals surrounding the beat are also exploited as feature. A database of annotated beats is built for the classifier for waveform comparison to unknown beats. Tested on 46 records in the MIT/BIH arrhythmia database, the method shows classification rate of 97.52%.

Ka, Ahmad Khoureich
2011-01-01

488

Indeterminacy of Spatiotemporal Cardiac Alternans

  CERN Preprints

Summary: Cardiac alternans, a beat-to-beat alternation in action potential duration (at the cellular level) or in ECG morphology (at the whole heart level), is a marker of ventricular fibrillation, a fatal heart rhythm that kills hundreds of thousands of people in the US each year. Investigating cardiac alternans may lead to a better understanding of the mechanisms of cardiac arrhythmias and eventually better algorithms for the prediction and prevention of such dreadful diseases. In paced cardiac tissue, alternans develops under increasingly shorter pacing period. Existing experimental and theoretical studies adopt the assumption that alternans in homogeneous cardiac tissue is exclusively determined by the pacing period. In contrast, we find that, when calcium-driven alternans develops in cardiac fibers, it may take different spatiotemporal patterns depending on the pacing history. Because there coexist multiple alternans solutions for a given pacing period, the alternans pattern on a fiber becomes unpredictable. Usin...

Zhao, Xiaopeng
2007-01-01

489

A pseudo active kinematic constraint for a biological living soft tissue: an effect of the collagen network

  CERN Preprints

Summary: Recent studies in mammalian hearts show that left ventricular wall thickening is an important mechanism for systolic ejection and that during contraction the cardiac muscle develops significant stresses in the muscular cross-fiber direction. We suggested that the collagen network surrounding the muscular fibers could account for these mechanical behaviors. To test this hypothesis we develop a model for large deformation response of active, incompressible, nonlinear elastic and transversely isotropic living soft tissue (such as cardiac or arteries tissues) in which we include a coupling effect between the connective tissue and the muscular fibers. Then, a three-dimensional finite element formulation including this internal pseudo-active kinematic constraint is derived. Analytical and finite element solutions are in a very good agreement. The numerical results show this wall thickening effect with an order of magnitude compatible with the experimental observations.

Bourdarias, Christian; Ohayon, Jacques
2008-01-01

490

Controlling spatiotemporal chaos in excitable media by local biphasic stimulation

  Nonlinear Sciences (arXiv)

Summary: Controlling spatiotemporal chaos in excitable media by applying low-amplitude perturbations {\\em locally} is of immediate applicability, e.g., in treating ventricular fibrillation, a fatal disturbance in the normal rhythmic functioning of the heart. We look at a mechanism of control by the local application of a series of biphasic pulses, i.e., involving both positive and negative stimulation. This results in faster recovery of the medium, making it possible to overdrive the chaos by generating waves with frequency higher than that possible with only positive pulses. This provides the simplest and most general understanding of the effectiveness of biphasic stimulation in controlling fibrillation and allows designing optimal waveshapes for controlling spatiotemporal chaos.

Johannes Breuer; Sitabhra Sinha
2004-06-21

491

Heart-induced movements in the thorax as detected by MRI

  CERN Preprints

Summary: In order to provide information for the use of radar in diagnostics a qualitative map of movements in the thorax has been obtained. This map was based on magnetic resonance image sequences of a human thorax during suspended respiration. The movements were measured using two distinct techniques. Segmentation provided measures of aorta dilatation and displacements, and image edge detection indicated other movements. The largest heart movements were found in the anterior and left regions of the heart with in-plane displacements on the order of 1 cm and which caused lung vessels displacements on the order of 2-3mm especially on the left side due to the heart ventricular. Mechanical coupling between the heart and aorta caused aorta displacements and shape distortions. Despite this coupling, aorta dilatations most likely reflected blood pressure variations.

Solberg, Lars Erik; Fosse, Erik; Hol, Per Kristian
2014-01-01

492

Mathematical modeling applied to the left ventricle of heart

  CERN Preprints

Summary: Background: How can mathematics help us to understand the mechanism of the cardiac motion? The best known approach is to take a mathematical model of the fibered structure, insert it into a more-or-less complex model of cardiac architecture, and then study the resulting fibers of activation that propagate through the myocardium. In our paper, we have attempted to create a novel software capable of demonstrate left ventricular (LV) model in normal hearts. Method: Echocardiography was performed on 70 healthy volunteers. Data evaluated included: velocity (radial, longitudinal, rotational and vector point), displacement (longitudinal and rotational), strain rate (longitudinal and circumferential) and strain (radial, longitudinal and circumferential) of all 16 LV myocardial segments. Using these data, force vectors of myocardial samples were estimated by MATLAB software, interfaced in the echocardiograph system. Dynamic orientation contraction (through the cardiac cycle) of every individual myocardial fiber could ...

Ranjbar, Saeed
2014-01-01

493

Vortex formation and instability in the left ventricle

  CERN Preprints

Summary: We study the formation of the mitral vortex ring during early diastolic filling in a patient-specific left ventricle (LV) using direct numerical simulation. The geometry of the left ventricle is reconstructed from Magnetic Resonance Imaging (MRI) data of a healthy human subject. The left ventricular kinematics is modeled via a cell-based activation methodology, which is inspired by cardiac electro-physiology and yields physiologic LV wall motion. In the fluid dynamics videos, we describe in detail the three-dimensional structure of the mitral vortex ring, which is formed during early diastolic filling. The ring starts to deform as it propagates toward the apex of the heart and becomes inclined. The trailing secondary vortex tubes are formed as the result of interaction between the vortex ring and the LV wall. These vortex tubes wrap around the circumference and begin to interact with and destabilize the mitral vortex ring. At the end of diastole, the vortex ring impinges on the LV wall and the large-scale int...

Le, Trung; Coffey, Dane; Keefe, Daniel
2011-01-01

494

Rate Control Management of Atrial Fibrillation: May a Mathematical Model Suggest an Ideal Heart Rate?

  CERN Preprints

Summary: Background. Despite the routine prescription of rate control therapy for atrial fibrillation (AF), clinical evidence demonstrating a heart rate target is lacking. Aim of the present study was to run a mathematical model simulating AF episodes with a different heart rate (HR) to predict hemodynamic parameters for each situation. Methods. The lumped model, representing the pumping heart together with systemic and pulmonary circuits, was run to simulate AF with HR of 50, 70, 90, 110 and 130 bpm, respectively. Results. Left ventricular pressure increased by 56.7%, from 33.92+-37.56 mmHg to 53.15+-47.56 mmHg, and mean systemic arterial pressure increased by 27.4%, from 82.66+-14.04 mmHg to 105.29+-7.63 mmHg, at the 50 and 130 bpm simulations, respectively. Stroke volume (from 77.45+-8.5 to 39.09+-8.08 mL), ejection fraction (from 61.1+-4.4 to 39.32+-5.42%) and stroke work (SW, from 0.88+-0.04 to 0.58+-0.09 J) decreased by 49.5, 35.6 and 34.2%, at the 50 and 130 bpm simulations, respectively. In addition, oxygen co...

Anselmino, Matteo; Camporeale, Carlo; Saglietto, Andrea; Gaita, Fiorenzo; Ridolfi, Luca
2015-01-01

495

Three-dimensional structure of the flow inside the left ventricle of the human heart

  CERN Preprints

Summary: The laboratory models of the human heart left ventricle developed in the last decades gave a valuable contribution to the comprehension of the role of the fluid dynamics in the cardiac function and to support the interpretation of the data obtained in vivo. Nevertheless, some questions are still open and new ones stem from the continuous improvements in the diagnostic imaging techniques. Many of these unresolved issues are related to the three-dimensional structure of the left-ventricular flow during the cardiac cycle. In this paper we investigated in detail this aspect using a laboratory model. The ventricle was simulated by a flexible sack varying its volume in time according to a physiologically shaped law. Velocities measured during several cycles on series of parallel planes, taken from two orthogonal points of view, were combined together in order to reconstruct the phase averaged, three-dimensional velocity field. During the diastole, three main steps are recognized in the evolution of the vortical str...

Fortini, S; Espa, S; Cenedese, A
2014-01-01

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