Question

What are the characteristics of Second Degree AV Block Type 2 (Mobitz II)?

1) P waves are conducted in a 2:1 ratio
2) Intermittent non-conducted P waves
3) Progressive prolongation of PR interval until a P wave is not conducted
4) Fixed PR interval with occasional non-conducted P waves

Answer 1

Second Degree AV Block Type 2 (Mobitz II) is characterized by intermittent non-conducted P waves, a fixed PR interval, occasional non-conducted P waves, and a 2:1 ratio of P wave conduction.

Step-by-step explanation:

Second Degree AV Block Type 2 (Mobitz II) is characterized by intermittent non-conducted P waves and a fixed PR interval with occasional non-conducted P waves. However, it does not involve a progressive prolongation of the PR interval like in other types of second-degree blocks. In Mobitz II, P waves are conducted in a 2:1 ratio, meaning every other P wave is not followed by a QRS complex.

In summary, characteristics of Second Degree AV Block Type 2 (Mobitz II) include:

• Intermittent non-conducted P waves
• A fixed PR interval
• Occasional non-conducted P waves
• Conduction of P waves in a 2:1 ratio