Influence of heart rate and atrial transport on left ventricular volume and function: relation to hemodynamic changes produced by supraventricular arrhythmia

Journal Article · Thu Oct 01 00:00:00 EDT 1981 · Am. J. Cardiol.; (United States)

DOI:https://doi.org/10.1016/0002-9149(81)90140-5· OSTI ID:5584348

Hung, J; Kelly, D T; Hutton, B F; Uther, J B; Baird, D K

The response of the left ventricle to pacing-induced changes in heart rate and the atrioventricular (A-V) relation was examined with equilibrium gated radionuclide ventriculography in 20 patients who had normal ventricular function after surgery for recurrent supraventricular tachycardia. In 10 patients count-derived left ventricular ejection fraction, end-diastolic volume and stroke volume were measured during sinus rhythm and during atrial pacing at 120, 140 and 160 beats/min. In the other 10 patients similar determinations were made during sequential A-V and simultaneous ventricular and atrial (V/A) pacing, both at rates of 100 and 160 beats/min. The data indicate that the hemodynamic consequences of supraventricular tachyarrhythmias in patients with normal ventricular function are due primarily to decreases in ventricular volume as heart rate is increased and atrial contribution is lost rather than to any changes in left ventricular ejection fraction.

• OSTI ID: 5584348
• Journal Information: Am. J. Cardiol.; (United States), Journal Name: Am. J. Cardiol.; (United States) Vol. 48:4; ISSN AJCDA
• Country of Publication: United States
• Language: English

Related Subjects

550601 -- Medicine-- Unsealed Radionuclides in Diagnostics
550901* -- Pathology-- Tracer Techniques
551001 -- Physiological Systems-- Tracer Techniques
59 BASIC BIOLOGICAL SCIENCES
62 RADIOLOGY AND NUCLEAR MEDICINE
BLOOD CIRCULATION
BLOOD PRESSURE
BODY
CARDIOVASCULAR DISEASES
CARDIOVASCULAR SYSTEM
DISEASES
DRUGS
DYNAMIC FUNCTION STUDIES
HEART
ISOTOPE APPLICATIONS
LABELLED COMPOUNDS
ORGANS
PATHOLOGY
PATIENTS
RADIOPHARMACEUTICALS
VOLUME