Pacemaker-mediated reentrant arrhythmia facilitated by an atrial-tracking leadless pacemaker.

PMRA may occur in patients who receive an AV synchronous leadless pacemaker with intact VA conduction and sinoatrial node dysfunction. Due to the lower rates of PMRA, this arrhythmia may be underrecognized. Interventions for and implications of PMRA need further investigation.