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Updated: Jun 18, 2026

A New Single Chamber Implantable Defibrillator with Atrial Sensing: A Practical Demonstration of Sensing and Ease of Implantation
Published on: February 28, 2012
Rate smoothing induced ventricular arrhythmia and syncope: a new device-induced proarrhythmia
Siva K Mulpuru1, Hiroshi Fujita, Cesare Saponieri
1Cardiovascular Diseases, Beth Israel Medical Center, 1st Avenue at 16th Street, New York, NY 10003, USA. osmecan2000@yahoo.com
Abstract:
A 74-year-old male presented to our emergency room with history of sudden onset palpitations associated with syncope. He had a single-chamber implantable cardioverter defibrillator implanted for secondary prevention of sudden cardiac death due to ischaemic cardiomyopathy. Interrogation of the device revealed episodes of non-sustained ventricular tachycardia (NSVT) at 220 ms. Post-tachycardia, another episode of NSVT with longer duration, was induced by rate smoothing pacing algorithm following premature ventricular beats. We describe this unique form of device-related proarrhythmia causing syncope.
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