In which rhythm does the SA node initiate an electrical impulse, but the impulse is not conducted to the atria?
A)Sinus arrest
B)Sinus dysrhythmia
C)Sinus exit block
D)Sinus bradycardia

Question

Quizplus · Accepted Answer

In sinus exit block, the SA node initiates an electrical impulse, but the impulse is not conducted to the atria due to a block in the pathway between the SA node and the atria. This results in a pause before the next impulse is generated by the SA node. In sinus arrest, there is a complete absence of electrical activity in the SA node resulting in a pause without any impulse. Sinus dysrhythmia refers to an irregularity in the rate and rhythm of the SA node and atria. Sinus bradycardia refers to a slow heart rate due to a decreased firing rate of the SA node.

In Which Rhythm Does the SA Node Initiate an Electrical