Continuous measurement of left ventricular ejection fraction

Conference · Sun Dec 31 23:00:00 EST 1972

OSTI ID:4412552

Parker, J A; Secker-Walker, R H; Hill, R L; Potchen, E J; McClain, W J; Maskewitz, B F

From 3rd symposium on sharing of computer programs and technology in nuclear medicine; Miami, Florida, USA (16 Jun 1973). In proceedings of third symposium on sharing of computer programs and technology in nuclear medicine. Measurement of left ventricular ejection fraction using radionuclides falls into two groups: methods that make use of the first passage of a bolus of the tracer through the heart and methods in which images of end-diastole and end-systole are gated from the electrocandiogram. Gated images are usually integrated over two to three hundred cardiac contractions and represent the mean performance during this time. A potential advantage of this method is that left ventricular ejection fraction could be measured repeatedly over several hours following a single injection of the vascular tracer, enabling the effect of therapy to be observed. The use of a small digital computer interfaced to a scintillation camera enables the calculation of ejection fraction to be made rapidly. Experience in measurirg the change in ejection fraction in dogs given a variety of drugs that alter cardiac performance is outlined. (auth)

• Research Organization: Washington Univ., St. Louis; comps.; Oak Ridge National Lab., Tenn. (USA)
• NSA Number: NSA-29-008117
• OSTI ID: 4412552
• Report Number(s): CONF-730627--
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

*HEART-- RADIOISOTOPE SCANNING
*RADIOISOTOPE SCANNING-- DATA ACQUISITION SYSTEMS
CARDIOVASCULAR DISEASES
COMPUTERS
DIAGNOSTIC TECHNIQUES
DOGS
DRUGS
GAMMA CAMERAS
INJECTION
LABELLED COMPOUNDS
N48830* --Life Sciences--New Tracer Techniques--Other
N80600 --Mathematics & Computers
NUCLEAR MEDICINE
PATIENTS
PHYSIOLOGY
RADIONUCLIDE ADMINISTRATION
TESTING
TRACER TECHNIQUES