Comparison of Results of Radiofrequency Catheter Ablation in Patients with Idiopathic and Secondary Ventricular Tachycardia

The aim of this study was to compare the results of radiofrequency catheter ablation (RFA) in patients (pts) with idiopathic and secondary ventricu lar tachycardia (VT). Sixty-six pts with monomorphic VT (1 I female, 55 m ale; m ean age 35.5± I 5.6 years, range I 0-75 years) were included. Forty-one pts presented with idiopathic (21 right ventricular outflow tract, 20 left ventricular VT) and 25 pts presented w ith secondary VT ( I 2 ischaemic, 5 arrythmogenic right ventricular dysplas ia, 3 dilated cardiomyopathy, I hypertrophic cardiomyopathy, 2 bundle branch reentrant tachycardia, I mitral valve prolapse, 1 post-operative). The mean duration of symptoms w as 73.1 ±77 months in idiopathic VT group and 37±38 months in secondary VT group (p<0,03). The pts in idiopathic VT group had prev iously received a mean of 2.79± 1.5 antiarrhythmic drugs, and a mean of 3.63±1.6 antiarrhythmic drugs were adınİnistered to the pts in secondary VT group. The mean number of RF pulses delivered to the 40 pts in idiopathic VT group (5.7±5) was significantly lower (p<0.05) than pls in secondary VT group (12.2+10). Primary success rate was 80% (20 of 25 pts) in secondary VT group and 92.6% in idiopathic VT group (38 of 4 ı pts). The m ean total d uration of the procedure w as ı ı 4±43 minules in idiopathic VT group and 144±75 minutes in secondary VT group. No serious complications occurred in both groups. Pts were followed for a m ean of 28.3± I 9 months in idiopathic VT group and 50.3±20.7 months in secondary VT group (pKeywords: Ablation, idiopathic, secondary, ventricular tachycardia