In sinus block
A)the pause is a multiple of the R-R intervals.
B)there are P waves inside the pause.
C)all R-R intervals are constant.
D)the heart rate varies from 100 to 160.

Question

Quizplus · Accepted Answer

In sinus block, the pause is a multiple of the R-R intervals. This means that the length of the pause between two beats is a multiple of the previous interval between two beats. Therefore, some R-R intervals are longer and some are shorter, leading to an irregular heart rate. P waves may or may not be present inside the pause, and a constant heart rate is not a characteristic of sinus block.

In Sinus Block