Myopotentials leading to ventricular fibrillation detection after advisory defibrillator generator replacement.
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?
Eckart
Robert E
RE
Cardiac Arrhythmia Service, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115, USA. robert.eckart@AMEDD.army.mil
Hruczkowski
Tomasz W
TW
Stevenson
William G
WG
Epstein
Laurence M
LM
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*