title: Myopotentials leading to ventricular fibrillation detection after advisory defibrillator generator replacement.
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?
authors.affiliation: Cardiac Arrhythmia Service, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115, USA. robert.eckart@AMEDD.army.mil
authors.forename: Robert E
authors.initials: RE
authors.lastname: Eckart
authors.forename: Tomasz W
authors.initials: TW
authors.lastname: Hruczkowski
authors.forename: William G
authors.initials: WG
authors.lastname: Stevenson
authors.forename: Laurence M
authors.initials: LM
authors.lastname: Epstein
mesh_terms: D000200:Action Potentials; D000368:Aged; D016477:Artifacts; D017147:Defibrillators, Implantable; D020878:Device Removal; D004562:Electrocardiography / Q000379:methods*; D004868:Equipment Failure; D019544:Equipment Failure Analysis / Q000379:methods; D005189:False Positive Reactions; D005260:Female; D006801:Humans; D014693:Ventricular Fibrillation / Q000175:diagnosis*