The PR interval viewed on a normal electrocardiogram represents:
A) atrial depolarization.
B) ventricular depolarization.
C) onset of atrial activation to onset of ventricular activity.
D) "electrical systole" of the ventricles.

Question

Quizplus · Accepted Answer

The PR interval on an ECG represents the time from the onset of atrial depolarization (beginning of the P wave) to the onset of ventricular depolarization (beginning of the QRS complex), indicating the time taken for electrical impulses to travel from the atria to the ventricles.

The PR Interval Viewed on a Normal Electrocardiogram Represents