Single-chamber versus dual-chamber implantable cardioverter defibrillators: indications and clinical results

Abstract The clinical benefit of standard (single-chamber) implantable cardioverter defibrillator (ICD) therapy in elderly patients or in subjects with moderate or severe heart failure who had ventricular tachyarrhythmias has been debated. We studied the follow-up of 450 patients who underwent standard ICD implantation at our institution in relation to the functional status of heart failure (New York Heart Association Class) or patient’s age. During a mean follow-up of 24±28 months (range,