While the SA node is considered the pacemaker of the heart, the AV node is also capable of generating spontaneous action potentials, allowing it to serve as a “backup system” in case of SA node failure. If the SA node fails, how would you anticipate the baseline heart rate to change, and why is this the case?

Human Physiology: From Cells to Systems (MindTap Course List)
9th Edition
ISBN:9781285866932
Author:Lauralee Sherwood
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Chapter10: The Blood Vessels And Blood Pressure
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While the SA node is considered the pacemaker of the heart, the AV node is also capable of generating spontaneous action potentials, allowing it to serve as a “backup system” in case of SA node failure. If the SA node fails, how would you anticipate the baseline heart rate to change, and why is this the case?

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