The Heart Spends Most of the Cardiac Cycle in Which

Question

The heart spends most of the cardiac cycle in which phase?
A) atrial systole
B) atrial diastole
C) ventricular systole
D) ventricular diastole
E) isovolumetric contraction

Accepted Answer

The heart spends most of the cardiac cycle (about 2/3) in ventricular diastole, during which time the ventricles are relaxed and filling with blood from the atria.