The AV blocks with a constant PR interval are
A)First-degree AV block and Wenckebach.
B)Wenckebach and third-degree AV block.
C)First-degree AV block and Mobitz II second-degree AV block.
D)First-degree AV block and third-degree AV block.

Question

Quizplus · Accepted Answer

First-degree AV block and Mobitz II second-degree AV block both have a constant PR interval. In first-degree AV block, the PR interval is prolonged but constant. In Mobitz II, the PR interval is constant for conducted beats.

The AV Blocks with a Constant PR Interval Are