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Updated: Oct 5, 2026

A New Single Chamber Implantable Defibrillator with Atrial Sensing: A Practical Demonstration of Sensing and Ease of Implantation
Published on: February 28, 2012
Inappropriate shock delivery due to ventricular double detection with a biventricular pacing implantable cardioverter
J Schreieck1, B Zrenner, C Kolb
1Deutsches Herzzentrum and 1. Medizinische Klinik, Klinikum rechts, Isar Technische Universität München, Munich, Germany. schreieck@dhm.mhn.de
Abstract:
This report describes a patient with advanced heart failure, pronounced intraventricular conduction delay, and ventricular tachycardias who underwent implantation of a multisite pacing ICD. Pacing leads were placed in the right atrium, right ventricular apex, and to the left ventricular posterior wall via a coronary sinus vein. The system proved to have correct sensing and pacing function in an atrial synchronized biventricular pacing mode and an appropriate detection of ventricular fibrillation. However, 1 month after implantation the patient received an inappropriate shock delivery due to double detection of ventricular premature beats. The inherent detection problem of dual ventricular sensing is discussed.
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