How do you distinguish between second-degree AV blocks, Mobitz type I or Mobitz type II?
A)In Mobitz type II, the PR intervals are constant.
B)The ventricular rate is greater than 60 bpm with Mobitz type II.
C)In Mobitz type II, the P waves appear to march right through the QRS complexes.
D)In Mobitz type II, there appears to be a pattern to the irregularity.

Question

Quizplus · Accepted Answer

In Mobitz type II, the PR intervals remain constant before a non-conducted P wave, distinguishing it from Mobitz type I (Wenckebach), where the PR interval progressively lengthens until a beat is dropped.

How Do You Distinguish Between Second-Degree AV Blocks, Mobitz Type