Referring to the ECG,the P Wave Represents

Question

Referring to the ECG,the P wave represents
A) atrial contraction.
B) ventricular relaxation.
C) atrial depolarization.
D) atrial repolarization.

Accepted Answer

The P wave on an ECG represents atrial depolarization, or the spread of electrical activity through the atria causing them to contract. The QRS complex represents ventricular depolarization and the T wave represents ventricular repolarization.