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Updated: Jul 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
Myopotentials leading to ventricular fibrillation detection after advisory defibrillator generator replacement
Robert E Eckart1, Tomasz W Hruczkowski, William G Stevenson
1Cardiac Arrhythmia Service, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115, USA. robert.eckart@AMEDD.army.mil
Abstract:
We present an unusual source of oversensing following an internal cardioverter-defibrillator generator change. The early appearance of reproducible myopotentials in the defibrillator sensing channel is usually due to a technical complication at the time of device implantation. Clues such as abrupt impedance change or reproduction with mechanical stimulation can help to localize a problem. Frequently the complication requires reoperation to examine the system. What do you do when everything seems to be working fine?
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