If the SA node is unable to function
A) an ectopic beat may be initiated by another part of the heart.
B) the heart rate will be slower.
C) the AV node will become the pacemaker for the heart.
D) All of these are possible.
E) None of these would occur.

Question

Quizplus · Accepted Answer

If the SA node is unable to function, an ectopic beat may be initiated by another part of the heart, which could cause an irregular heart rhythm. The heart rate may also be slower, as the AV node usually has a slower intrinsic rate than the SA node. In some cases, the AV node may take over as the pacemaker for the heart, although this is not always possible or desirable. Therefore, all of these scenarios are possible.

If the SA Node Is Unable to Function