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Updated: Mar 13, 2026

A New Single Chamber Implantable Defibrillator with Atrial Sensing: A Practical Demonstration of Sensing and Ease of Implantation
Published on: February 28, 2012
[Optimisation of subcutaneous defibrillator programming after inappropriate shocks due to new onset of right bundle
Claudia Schaarschmidt1, Christof Kolb2
1Deutsches Herzzentrum München, Klinik für Herz- und Kreislauferkrankungen, Abteilung für Elektrophysiologie, Fakultät für Medizin, Technische Universität München, Lazarettstr. 36, 80636, München, Deutschland. Schaarschmidt@dhm.mhn.de.
Abstract:
The subcutaneous implantable defibrillator (S-ICD) has become an established tool for the prevention of sudden cardiac death. Based on its detection properties, the S‑ICD is essentially dependent on correct morphology discrimination of the QRS complex and avoidance of potential T‑wave sensing. We report on a patient who experienced multiple inappropriate S‑ICD shocks due to T‑wave oversensing in the setting of new onset of right bundle branch block. Strategies for the optimisation of the device programming are discussed.
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