How Many ICD Recipients Really Need Dual-Chamber Pacing?
Dual-chamber pacing showed a mortality decrease in comparison to ventricular pacing, and a lower incidence of atrial fibrillation and thromboembolic complications, especially in patients with congestive heart failure [1, 2]. The dual-chamber implantable cardioverter-defibrillator (DDD-ICD) became available in July 1997; this device enables atrioventricular pacing and sensing in case of bradycardia, as well as sensing of atrial events in case of atrial tachyarrhythmias. The proportion of patients in whom DDD-ICD is indicated is still a subject of debate, and so far no prospective data about the clinical indications and possible advantages of the DDD-ICD in comparison to the single-chamber DDD-ICD are available . However, accurate identification of candidates for the DDD-ICD is essential because of the higher technological complexity and cost of this device in comparison to the single-chamber ICD.
KeywordsAtrial Fibrillation Ventricular Tachycardia Ventricular Fibrillation Paroxysmal Atrial Fibrillation Supraventricular Tachycardia
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