Copyright © 2002 by the European Society of Cardiology.
Low recurrence of syncope in patients with inducible sustained ventricular tachyarrhythmias treated with an implantable cardioverter-defibrillator
Arrhythmia Section, Cardiovascular Institute, Hospital Clínic Universitari, Barcelona, Spain
revised October 15, 2001; accepted October 17, 2001
Abstract
Aims To determine the effectiveness of the implantable cardioverter defibrillator (ICD) in preventing recurrence of syncope in patients with structural heart disease, previously unexplained syncope and inducible ventricular arrhythmias.
Methods Thirty-eight patients with syncope, structural heart disease and inducible arrhythmias had an ICD implanted. All ICDs delivered antitachycardia pacing and shocks of adjusted energy. Detection and therapy were programmed according to uniform criteria.
Results The mean age of the patients was 63±11 years and most of them were male (36/38). After a mean follow-up of 28±15 (4–61) months, six patients died and one underwent heart transplantation. Syncope recurred in three patients, but in none of them was it caused by an arrhythmic event. In 18 patients, 113 episodes of ventricular tachycardia/ventricular fibrillation were detected and appropriately treated by the ICD. The mean time from implant until first appropriate therapy was 18±14 months. The actuarial probability of receiving appropriate therapy was 20% and 42% at 12 and 24 months, respectively.
Conclusions In patients with unexplained syncope, structural heart disease and inducible arrhythmias, ICD prevents syncope associated with arrhythmic events. Frequent effective use of antitachycardia pacing and shocks of adjusted energy seem essential to this aim. Copyright 2002 The European Society of Cardiology. Published by Elsevier Science Ltd. All rights reserved.
Key Words: Implantable cardioverter defibrillator, syncope, ventricular arrhythmias
f1 Correspondence: L. Mont, Arrhythmia Section, Cardiovascular Institute, Hospital Clínic, Villarroel 170, 08036, Barcelona, Spain.
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