title: Correlation between surface and intracardiac electrocardiogram in a patient with inappropriate defibrillation shocks due to hyperkalemia.
abstract: A 39-year-old man received implantable cardioverter defibrillator (ICD) shocks during sinus rhythm, triggered by an increase in amplitude and oversensing of intracardiac T waves, caused by hyperkalemia. After treatment of hyperkalemia, the T wave morphology normalized, and oversensing and inappropriate ICD shocks were eliminated. Alteration of the intracardiac electrogram was well correlated to the surface electrocardiogram (ECG) changes. Intracardiac T waves can be altered by hyperkalemia and it seems that this alteration can be estimated by surface ECG analysis.
authors: The First Department of Internal Medicine, Niigata University School of Medicine.
authors: Yukio
authors: Y
authors: Hosaka
authors: Masaomi
authors: M
authors: Chinushi
authors: Kenichi
authors: K
authors: Iijima
authors: Akiko
authors: A
authors: Sanada
authors: Hiroshi
authors: H
authors: Furushima
authors: Yoshifusa
authors: Y
authors: Aizawa
mesh_terms: D000328:Adult; D017147:Defibrillators, Implantable / Q000009:adverse effects*; D004554:Electric Countershock / Q000009:adverse effects; D004562:Electrocardiography / Q000379:methods*; D006801:Humans; D006947:Hyperkalemia / Q000150:complications* / Q000503:physiopathology; D008297:Male; D017180:Tachycardia, Ventricular / Q000150:complications / Q000503:physiopathology / Q000628:therapy