How To Choose Between Single-Chamber and Dual-Chamber ICD

  • Maurizio Del Greco
  • Lorena Gramegna
  • Massimiliano Marini
  • Marcello Disertori
Conference paper


Patients in whom an implantable cardioverter defibrillator (ICD) is indicated and who have concomitant significant sinus-node disease or atrioventricular block may be candidates for a dual-chamber device. However, it is still a matter of debate whether the dual-chamber ICD is also advantageous for patients with preserved sinus and atrioventricular nodal function, as data from prospective randomized trials are limited. Overall, the number of implanted dual-chamber devices has been increasing and, according to the 2003 AIAC Registry data, accounted for one-third of all the defibrillators implanted in Italy, while single chamber devices made up 39%. The theoretical advantages of dual-chamber ICDs are: better supraventricular tachycardia (SVT) discrimination, optimal treatment of bradyarrhythmias (pre-existing or drug induced), and major hemodynamic benefits.


Implantable Cardioverter Defibrillator Ventricular Pace Implantable Defibrillator Dual Chamber Dual Chamber Pacemaker 
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Copyright information

© Springer-Verlag Italia 2007

Authors and Affiliations

  • Maurizio Del Greco
    • 1
  • Lorena Gramegna
    • 1
  • Massimiliano Marini
    • 1
  • Marcello Disertori
    • 1
  1. 1.Electrophysiology Laboratory, Cardiology DepartmentS. Chiara HospitalTrentoItaly

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