What characterizes accelerated junctional rhythm?

Accelerated junctional rhythm is characterized by a heart rate that ranges from 60 to 100 beats per minute (bpm). This rhythm originates from the junctional tissues, typically in response to conditions that lead to increased automaticity of these tissues when the sinus node fails to function appropriately or in cases where atrial activity is suppressed.

The key distinguishing feature of this rhythm is its heart rate, which falls within this specific range. At rates below 60 bpm, the rhythm would be classified as junctional escape rhythm, while rates exceeding 100 bpm would indicate junctional tachycardia. Thus, the heart rate range of 60 to 100 bpm classifies it as accelerated junctional rhythm, marking it as an increase in rate that does not exceed the tachycardic threshold.