Accelerated Junctional Rhythm

Accelerated junctional rhythm (AJR) occurs when the rate of an AV junctional pacemaker exceeds that of the sinus node. This situation arises when there is increased automaticity in the AV node coupled with decreased automaticity in the sinus node.

ECG Features

Heart rate: 60-100 bpm

P waves: Absent, inverted, or buried in the QRS complex

QRS complex: Normal duration (narrow)

PR interval: Shortened or absent

Rhythm: Regular