In an ECG,the P wave represents
A)depolarization of the atriA.
B)depolarization of the ventricles.
C)repolarization of the atria.
D)repolarization of the ventricles.

Question

Quizplus · Accepted Answer

The P wave in an ECG represents the depolarization of the atria. This is the electrical impulse that initiates the contraction of the atria, which is responsible for the first heartbeat sound (S1) heard on auscultation.

In an ECG,the P Wave Represents