In the normal electrocardiogram,what does the PR interval represent?
A) Atrial depolarization
B) Ventricular depolarization
C) Atrial activation to onset of ventricular activity
D) Electrical systole of the ventricles

Question

Quizplus · Accepted Answer

The PR interval is a measure of time from the onset of atrial activation to the onset of ventricular activation; it normally ranges from 0.12 to 0.20 second.The PR interval represents the time necessary to travel from the sinus node through the atrium,the atrioventricular (AV)node,and the His-Purkinje system to activate ventricular myocardial cells.This selection is the only option that accurately describes the PR interval.

In the Normal Electrocardiogram,what Does the PR Interval Represent