Indications for dual-chamber cardioverter defibrillators at implant and at 1 year follow-up: A retrospective analysis in the single-chamber defribillator era

Alessandro Proclemer, P. Della Bella, D. Facchin, L. Fattore, C. Carbucicchio, C. Tondo, M. Lunati, M. R. Vecchi, E. Petz, M. Zecchin

Research output: Contribution to journalArticlepeer-review

Abstract

Aim. This retrospective four-centre study assessed the current indications for dual-chamber implantable cardioverter defibrillators (ICDs) at implant and during a medium-term follow-up period in a group of patients treated by single-chamber ICD in the pre dual-chamber ICD era. Methods and Results. The study population consisted of 153 consecutive patients (127 males, mean age 58 ± 6 years) treated by single-chamber ICD for ventricular tachycardia and/or ventricular fibrillation. Definite indications for having a dual-chamber ICD included the presence of sinus node dysfunction and of second- or third-degree atrioventricular (AV) block, while possible indications were represented by paroxysmal atrial fibrillation or flutter and first-degree AV block. At implant, dual-chamber ICD would appear definitely indicated in 10·5% of cases, and possibly indicated in an additional 17·5% of cases. During 12 ± 10 months follow-up, such percentages remained stable (11 and 19·5%, respectively). Inappropriate ICD intervention was documented in five of 13 patients (38%), with episodes of paroxysmal atrial fibrillation or flutter. Conclusion. In this non-selected study population, a dual-chamber ICD would have potentially benefited approximately 30% of the patients. During medium-term follow-up, there was no progression towards increasing dual-chamber ICD indications. The 15% cumulative incidence of paroxysmal atrial tachyarrhythmias justifies the activation of dedicated detection algorithms.

Original languageEnglish
Pages (from-to)132-135
Number of pages4
JournalEuropace
Volume3
Issue number2
DOIs
Publication statusPublished - 2001

Keywords

  • Dual-chamber pacing
  • Implantable cardioverter defibrillator

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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