Holter documented sudden death in a patient with an implanted defibrillator

• Published in: Pacing and clinical electrophysiology Vol. 15; no. 7; p. 1008
• Main Authors: Birgersdotter-Green, U, Rosenqvist, M, Lindemans, F W, Rydén, L, Rådegran, K
• Format: Journal Article
• Language: English
• Published: United States 01-07-1992
• Subjects: Aged; Algorithms; Atrial Fibrillation - etiology; Death, Sudden, Cardiac; Electric Countershock - instrumentation; Electrocardiography, Ambulatory; Equipment Design; Humans; Male; Pacemaker, Artificial; Prostheses and Implants; Tachycardia - therapy; Tachycardia, Supraventricular - diagnosis; Tachycardia, Supraventricular - therapy
• ISSN: 0147-8389
• DOI: 10.1111/j.1540-8159.1992.tb03094.x

A 68-year-old man with recurrent attacks of monomorphic ventricular tachycardia (VT) received a pacer cardioverter defibrillator featuring antitachycardia pacing and cardioversion/defibrillation. Over 300 episodes of VT were successfully terminated by antitachycardia pacing. During Holter monitoring the patient experienced supraventricular tachycardia with delivery of multiple antitachycardia pacing, cardioversion, and defibrillation therapies ending with the death of the patient. The following factors played a role in the unfortunate outcome of this patient: 1. triggering of VT therapy by an unexpected high sinus rate; 2. atrial fibrillation induced by cardioversion therapy; 3. a gradual and continuous increase in rate during atrial fibrillation possibly caused by repeated VT and ventricular fibrillation therapies and/or by a thrombus, found at autopsy, in a bypass graft; and 4. the limited ability of presently available defibrillators to distinguish between ventricular and supraventricular arrhythmias.