During the cardiac cycle,
A)the P wave of the ECG occurs between the first and second heart sounds.
B)the QRS complex of the ECG precedes the increase in ventricular pressure.
C)the second heart sound occurs during atrial systole.
D)the second heart sound coincides with the QRS complex of the ECG.
E)both QRS complex of the ECG precedes the increase in ventricular pressure and second heart sound coincides with the QRS complex of the ECG.

Question

Quizplus · Accepted Answer

The QRS complex of the ECG precedes the increase in ventricular pressure. This is because the QRS complex represents the depolarization of the ventricles, which leads to their contraction and subsequent increase in pressure.

During the Cardiac Cycle