At which of these rates can the atrioventricular node initiate a heartbeat?

Question

Quizplus · Accepted Answer

The atrioventricular node is capable of initiating a heartbeat at a rate of 40 to 60 beats per minute. This is known as the atrioventricular nodal rhythm, and it occurs when the SA node fails to initiate a heartbeat or when its conduction is blocked. While the other rates listed are within the normal range for heart rate, they do not relate to the specific function of the atrioventricular node.

At Which of These Rates Can the Atrioventricular Node Initiate