title: Radiofrequency catheter ablation of idiopathic right ventricular outflow tract arrhythmias.
abstract: Idiopathic ventricular arrhythmias (VA) consist of various subtypes of VA that occur in the absence of clinically apparent structural heart disease. Affected patients account for approximately 10% of all patients referred for evaluation of ventricular tachycardia (VT). Arrhythmias arising from the outflow tract (OT) are the most common subtype of idiopathic VA and more than 70-80% of idiopathic VTs or premature ventricular contractions (PVCs) originate from the right ventricular (RV) OT. Idiopathic OT arrhythmias are thought to be caused by adenosine-sensitive, cyclic adenosine monophosphate (cAMP) mediated triggered activity and, in general, manifest at a relatively early age. Usually they present as salvos of paroxysmal ventricular ectopic beats and are rarely life-threatening. When highly symptomatic and refractory to antiarrhythmic therapy or causative for ventricular dysfunction, ablation is a recommended treatment with a high success rate and a low risk of complications.
authors: Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands.
authors: Naiara
authors: N
authors: Calvo
authors: Monique
authors: M
authors: Jongbloed
authors: Katja
authors: K
authors: Zeppenfeld
keywords: ICDs; ablation; outflow tract; premature ventricular contractions; ventricular arrhythmias