Which of the following is a characteristic of sinus arrest?
A)The cardiac complexes before and after the sinus pause are usually regular.
B)The PR interval is affected by the pause during a sinus arrest episode.
C)The atrial and ventricular rates are different.
D)The QRS morphology varies during periods of sinus arrest.

Question

Quizplus · Accepted Answer

Sinus arrest is characterized by a sudden pause in the heart's sinus rhythm, where the cardiac complexes before and after the pause are usually regular, indicating a temporary cessation of sinus node activity rather than a disturbance in the conduction system affecting PR interval, atrial/ventricular rate synchronization, or QRS morphology.

Which of the Following Is a Characteristic of Sinus Arrest