A patient care technician should identify that which of the following structures of the heart is immediately affected if a sinoatrial (SA) node fails?
A. Bundle of His
B. Purkinje fibers
C. Atrioventricular node
D. Interventricular septum
Answer (2)
The Atrioventricular (AV) node is the structure that is immediately affected if the sinoatrial (SA) node fails. The AV node acts as a backup pacemaker, maintaining cardiac rhythm at a slower rate when the SA node is not functioning. Understanding this hierarchy in the cardiac conduction system is crucial for managing heart function. ;
The Atrioventricular (AV) node is immediately affected when the sinoatrial (SA) node fails as it takes over as a secondary pacemaker. The AV node helps maintain a heartbeat at a slower rate of 40-60 beats per minute. Understanding the roles of these components is vital in cardiac care.
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