title: Atrial lead malfunction presenting as new onset pacemaker-mediated tachycardia.
abstract: 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.
authors.affiliation: The Florida Heart Rhythm Institute, Tampa, FL, USA. ssbarold@aol.com
authors.forename: S Serge
authors.initials: SS
authors.lastname: Barold
authors.forename: Roland X
authors.initials: RX
authors.lastname: Stroobandt
mesh_terms: D000368:Aged; D004567:Electrodes, Implanted / Q000009:adverse effects*; D004868:Equipment Failure; D006801:Humans; D008297:Male; D010138:Pacemaker, Artificial / Q000009:adverse effects*; D017180:Tachycardia, Ventricular / Q000175:diagnosis / Q000209:etiology* / Q000517:prevention & control*