The second heart sound coincides with the beginning of which period in the cardiac cycle?
A) atrial contraction
B) ventricular filling
C) isovolumetric contraction
D) isovolumetric relaxation
E) ventricular ejection

Question

Quizplus · Accepted Answer

The second heart sound marks the closure of the aortic and pulmonary valves at the onset of ventricular diastole, which coincides with the beginning of isovolumetric relaxation.

The Second Heart Sound Coincides with the Beginning of Which