Question

When the SA node fails to generate an impulse or the rate of impulse falls below that of the AV node, the resulting rhythm is?

Answer 1

The resulting rhythm is a slow heart rate or bradycardia when the SA node fails to generate an impulse or the rate of impulse falls below that of the AV node.

Step-by-step explanation:

When the SA node fails to generate an impulse or the rate of impulse falls below that of the AV node, the resulting rhythm is a slow heart rate or bradycardia. Without the SA node, the AV node would take over as the pacemaker and generate a heart rate of 40-60 beats per minute. This is lower than the normal heart rate of 80-100 beats per minute initiated by the SA node.