Open AccessLeft ventricular function during atrial pacing: A radionuclide angiographic study
Author(s) -
Rozenman Y.,
Weiss A. T.,
Atlan H.,
Gotsman M. S.
Publication year - 1984
Publication title -
clinical cardiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.263
H-Index - 72
eISSN - 1932-8737
pISSN - 0160-9289
DOI - 10.1002/clc.4960070606
Subject(s) - ejection fraction , radionuclide angiography , medicine , cardiology , ventricle , stroke volume , heart rate , diastole , cardiac output , systole , radionuclide ventriculography , hemodynamics , heart failure , blood pressure
Multigated radionuclide angiography was performed at rest and during atrial pacing in 10 normal subjects. Left ventricular volumes in diastole and systole were measured by total counts in the region of interest of the left ventricle. Stroke volume, cardiac output, ejection fraction, and rates of ejection for each heart rate were calculated. As heart rate increased, there was a gradual decrease in end‐diastolic, end‐systolic, and stroke volumes without a significant change in cardiac output and ejection fraction. Ejection fraction rate increased and the uncorrected ejection rate decreased with the increase in heart rate. The normal response to tachycardia induced by atrial pacing was a decrease in ventricular volumes witthout a change in ejection fraction or cardiac output.