ID Number		1413
Study Type		Engineering & Physics
Model		75 MHz (AM 50 Hz) (toy car remote) interference with a cardiac defibrillator (case study)
Details		Case study of a 46-year-old man with a third generation multi-programmable implantable cardioverter defibrillator for sustained monomorphic ventricular tachycardia. One year post implant, while manipulating an RF remote control for a toy car (75.95 MHz, 50 Hz modulation, operated by a12-volt battery), the patient experienced an aberrant 34-joule defibrillator discharge (not preceded by detection of an arrhythmia). After interrogating the defibrillator, the authors concluded the discharge had been caused by lead noise, presumably from the remote control. Controlled lab testing supported the conclusion that the RF remote control could trigger tachyarrhythmia sensing and reproduce the clinical episode when within 8 cm of the pulse generator and at specific angles relative to the device when the antenna length was > 45 cm. Interference was eliminated when a ground wire was attached to the antenna and when an aluminum shield was placed between the pulse generator and the remote control
Findings		Effects
Status		Completed With Publication
Principal Investigator		University of Michigan Medical Center, Ann Arbor M
Funding Agency		Private/Instit.
Country		UNITED STATES
References		Man, KC et al. Pacing Clin. Electrophysiol., (1993) 16:1756-1758
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