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Updated: Jun 28, 2026

A New Single Chamber Implantable Defibrillator with Atrial Sensing: A Practical Demonstration of Sensing and Ease of Implantation
Published on: February 28, 2012
A fortuitous syncope. The pitfalls of integrated bipolar defibrillator leads
Tushar V Salukhe1, Ian Wright, Matthew Wright
1Department of Cardiac Electrophysiology, St Mary's Hospital and Imperial College, London, UK. salukhe@aol.com
Abstract:
Myopotential oversensing in implantable defibrillators causing inhibition of pacing and inappropriate therapies is well described. Current literature is dominated by reports of diaphragmatic muscle as the source of such far-field oversensing. Those reporting pectoral muscle sources were invariably due to unipolar sensing circuits, incorrect DF-1 connections or inappropriate programming. We report an interesting case of pectoral muscle myopotential oversensing causing inhibition of bradycardia pacing leading to presyncope and syncope.
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