The nurse understands that in a third-degree AV block
A) every P wave is conducted to the ventricles.
B) some P waves are conducted to the ventricles.
C) none of the P waves are conducted to the ventricles.
D) the PR interval is prolonged.

Question

Quizplus · Accepted Answer

Third-degree block is often called complete heart block because no atrial impulses are conducted through the AV node to the ventricles.Normally every P wave is conducted to the ventricles.If some of the P waves are conducted but others are not,further assessment is needed to determine the type of block present.A prolonged PR interval is a first-degree AV block,and is well tolerated and requires no treatment.

The Nurse Understands That in a Third-Degree AV Block