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Radiofrequency ablation of “benign” right ventricular outflow tract extrasystoles * * Editorials published in the Journal of American College of Cardiology reflect the views of the authors and do not necessarily represent the views of JACC or the American College of Cardiology.

Ventricular arrhythmias occur in the normal heart ( 1 ). For unclear reasons, the most frequently idiopathic ventricular arrhythmias originate from the right ventricular outflow tract (RVOT) ( 2 ). In some cases, the RVOT arrhythmias are manifested as multiple extrasystoles, couplets, and even short bouts of ventricular tachycardia ( 3 ) that usually are well tolerated and associated with mild extrasystolic palpitations or even no symptoms at all in as many as one-third of the patients ( 2 ). Nevertheless, these arrhythmias occasionally can be very symptomatic and invalidating. However, their long-term prognosis generally is considered as benign ( 4 ) despite exceptional reports of sudden death and ventricular fibrillation in adults and children ( 5–7 ). Before radiofrequency ablation (RFA), general agreement existed that no therapy was necessary for most patients with various forms of RVOT arrhythmias and that medical treatment was reserved only for very disabled patients. After RFA was shown highly effective in curing sustained and nonsustained forms of RVOT tachycardias ( 8 ), several investigators ( 9,10 ) applied this technique for treating high-grade RVOT ectopy. Zhu et al. ( 10 ) reported the first series of successful RFA of frequent, medically refractory, http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of the American College of Cardiology Elsevier
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