Correlation between surface and intracardiac electrocardiogram in a patient with inappropriate defibrillation shocks due to hyperkalemia.
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.
Hosaka
Yukio
Y
The First Department of Internal Medicine, Niigata University School of Medicine.
Chinushi
Masaomi
M
Iijima
Kenichi
K
Sanada
Akiko
A
Furushima
Hiroshi
H
Aizawa
Yoshifusa
Y
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