What is the typical heart rate range for an atrial escape rhythm?

What is the typical heart rate range for an atrial escape rhythm?

• A. 40-60 bpm
• B. 60-80 bpm
• C. 80-100 bpm
• D. 100-120 bpm

Answer: (B)

An atrial escape rhythm is characterized by a heart rate that typically ranges from 60 to 80 beats per minute. This rhythm often arises in situations where the normal pacemaker of the heart (the sinoatrial node) fails to function properly, allowing the atria to generate impulses at their inherent rate. Atrial escape rhythms occur when there is a need for the heart to maintain some level of activity, and the atrial tissue takes over in pacing the heart. The range of 60 to 80 bpm reflects the physiological capacity of the atria as secondary pacemakers, which is slightly lower than the primary pacemaker rate, thus leading to a regular rhythm that is reliable but not as rapid. This range helps distinguish atrial escape rhythms from other types of rhythms, such as junctional or ventricular escape rhythms, which operate at different rates.