Question

Which of the following best describes 3 rd degree AV block

A. shortened PR interval
B. lengthened PR interval
C. disassociation of the P wave and the QRS complex
D. disassossociation of the T wave and the QRS complex

Answer 1

In a third-degree AV block, there is no correlation between atrial activity (the P wave) and ventricular activity (the QRS complex).

Step-by-step explanation:

In a third-degree AV block, there is no correlation between atrial activity (the P wave) and ventricular activity (the QRS complex).

This means that the P waves and QRS complexes are not synchronized and occur independently. The correct answer is C. disassociation of the P wave and the QRS complex.