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

Question

Quizplus · Accepted Answer

The P wave on an ECG represents atrial depolarization, which is the electrical activation of the atria that leads to atrial contraction. This is the first wave seen on an ECG and is a reflection of the electrical activity of the sinoatrial node. It is followed by the QRS complex, which represents ventricular depolarization and subsequent contraction. The T wave represents ventricular repolarization, which is the resetting of the electrical activity in preparation for the next heartbeat.

Referring to the ECG,the P Wave Represents