Which of the following types of second-degree AV block is most likely to rapidly progress rapidly to a third-degree AV block without warning?

Question

Quizplus · Accepted Answer

Second-degree AV block type II occurs below the AV node, either at the bundle of His or, more commonly, at the level of the bundle branches. This type of block is more serious than second-degree AV block type I and may rapidly progress to third-degree AV block without warning. Preparations should be made for pacing when this rhythm is recognized. The use of atropine should be avoided. In this situation, atropine will usually not improve the block but will increase the rate of discharge of the SA node. This may trigger a situation in which even fewer impulses are conducted through to the ventricles and the ventricular rate is further slowed.

Which of the Following Types of Second-Degree AV Block Is