Key result
Intraoperative recordings of the ventricular electrogram in 11 patients with demand pacemakers demonstrated spurious signals mimicking an R-wave, indicating intermittent pacing lead fracture.
Case Report (n=11)
Pacing and recording on the same lead is an effective technique for detecting spurious signals indicative of intermittent pacing lead fracture in patients with demand pacemakers.
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May aid intraoperative detection of intermittent lead fracture; leaves open prospective validation before wider adoption.
This report describes some of the various techniques which may be used to demonstrate intermittent and/or incomplete fracture of a pacing lead. Eleven patients treated with an R-wave-inhibited demand pacer showed signs of paroxysmal arrhythmias. Intraoperative recordings of the ventricular electrogram showed the presence of spurious signals mimicking an R-wave. These signals varied from patient to patient but remained morphologically constant when a given technique was used in a given case. The most significant signals were picked up when pacing and recording on the same lead.
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Múgica et al. (1978) conducted a case report in Demand pacemaker arrhythmias due to pacing lead fracture (n=11). Intraoperative recordings of the ventricular electrogram was evaluated on Presence of spurious signals mimicking an R-wave. Intraoperative recordings of the ventricular electrogram in 11 patients with demand pacemakers demonstrated spurious signals mimicking an R-wave, indicating intermittent pacing lead fracture.
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