Oversensing of pacemakers in the bipolar pacing configuration: Paradoxic resolution with programming to unipolar sensing
1994; Elsevier BV; Volume: 128; Issue: 3 Linguagem: Inglês
10.1016/0002-8703(94)90641-6
ISSN1097-6744
AutoresUri Ben-Zur, Jay Gross, Mark Goldberger, Peter L. Tilkemeier, Albert K. Weyman, Seymour Furman,
Tópico(s)Cardiac electrophysiology and arrhythmias
ResumoA 65-year-old gentleman with dual chamber pacemaker presented with presyncope. The ECG raised concerns of oversensing which was confirmed by magnet response. The device interrogation revealed noise in ventricular channel temporally associated with P wave. The pacing thresholds were normal. Although the ventricular lead impedance was within normal limit the impedance trend suggested 100 Ω decline over last 1 year. RV lead insulation failure was speculated and supported by the bipolar and unipolar intracardiac electrogram. Device was programmed to DOO temporarily. He underwent RV lead replacement uneventfully.
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