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Europace. 2012 Jul;14(7):1060-1. doi: 10.1093/europace/eur405. Epub 2012 Jan 26.

Atrial lead malfunction presenting as new onset pacemaker-mediated tachycardia.

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  • 1The Florida Heart Rhythm Institute, Tampa, FL, USA.


This report describes the de novo occurrence of pacemaker-mediated tachycardia (PMT) in a patient with a dual-chamber implantable cardioverter-defibrillator and stable retrograde ventriculoatrial conduction time. The same rate-adaptive post-ventricular atrial refractory period (PVARP) duration had previously prevented PMT. Oversensing of atrial false signals from a defective lead shortened the PVARP with consequent sensing of retrograde conduction.

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