When the PR interval consistently exceeds 0.20 seconds in duration and the QRS rate is 60-100,which abnormality is present?
A) first degree AV block
B) second degree AV block
C) complete AV block
D) asystole

Question

Quizplus · Accepted Answer

A PR interval longer than 0.20 seconds indicates delays in the conduction of electrical impulses between the atria and ventricles, which is indicative of first degree AV block. Second degree AV block and complete AV block would result in dropped beats and longer periods of missing QRS complexes, and asystole would result in a complete absence of heart rhythm.

When the PR Interval Consistently Exceeds 0