A bundle branch block has which of the following characteristics?
A)It causes narrowed QRS complexes to appear on the ECG.
B)It accelerates depolarization of the ventricle it supplies.
C)It occurs when the bundle branches fail to conduct impulses.
D)It causes a prolonged PR interval.

Question

Quizplus · Accepted Answer

A bundle branch block occurs when the electrical impulses from the bundle branches fail to conduct properly, resulting in a delay or blockage in depolarization of the ventricles. This manifests as widened QRS complexes on the ECG, rather than narrowed. It does not affect the PR interval or accelerate depolarization.

A Bundle Branch Block Has Which of the Following Characteristics