You have performed an ECG on a patient in the critical care unit at the hospital. A portion of the ECG tracing is shown below. What type of heart block does this patient have?
A)First-degree heart block
B)Second-degree AV block, Mobitz type I
C)Second-degree AV block, Mobitz type II
D)Third-degree AV block

Question

You have performed an ECG on a patient in the critical care unit at the hospital. A portion of the ECG tracing is shown below. What type of heart block does this patient have? 
A)First-degree heart block 
B)Second-degree AV block, Mobitz type I 
C)Second-degree AV block, Mobitz type II 
D)Third-degree AV block

Quizplus · Accepted Answer

The ECG tracing shows regularly occurring P waves, but not all P waves are followed by QRS complexes. Some P waves are not conducted to the ventricles, indicating second-degree AV block. The QRS complexes that are present have a consistent morphology, ruling out Mobitz type I. However, there are multiple consecutive P waves that are not followed by QRS complexes, indicating a Type II block. Thus, the patient has a second-degree AV block, Mobitz type II.

You Have Performed an ECG on a Patient in the Critical