The second heart sound is heard during which phase of the cardiac cycle?
A) ventricular filling
B) isovolumetric relaxation
C) isovolumetric contraction
D) ventricular ejection

Question

Quizplus · Accepted Answer

The second heart sound (S2) is heard during the isovolumetric relaxation phase of the cardiac cycle, which occurs immediately after ventricular ejection. During this phase, the ventricles begin to relax and their volume remains constant, while the aortic and pulmonary valves close, producing S2.

The Second Heart Sound Is Heard During Which Phase of the Cardiac