When the SA node fails to generate an impulse or the rate of impulse generation falls below that of the AV node, the resulting rhythm is called a:
A) premature junction complex rhythm.
B) junctional tachycardia rhythm.
C) junctional escape rhythm.
D) junctional atrial rhythm.

Question

Quizplus · Accepted Answer

When the SA node fails to generate an impulse or the rate of impulse generation falls below that of the AV node, the resulting rhythm is called a junctional escape rhythm. This is because the AV node takes over as the primary pacemaker and generates an escape rhythm to maintain the heart rate. This is not a premature junctional complex rhythm or a junctional tachycardia rhythm, as these are different types of arrhythmias. A junctional atrial rhythm is also not the correct answer, as this refers to an arrhythmia where the atria are being paced by the AV node, rather than the SA node.

When the SA Node Fails to Generate an Impulse or the Rate