Radiofrequency Catheter Ablation of Idiopathic Ventricular Tachycardia

Objective: To analyze electrophysiological characteristics, methods of radiofrequency catheter ablation and results of catheter ablation of idiopathic ventricular tachycardia in 27 cases of patients. Methods: This study included 27 patients, male 24, female 3, mean age 11～58 years old. All patients were testified ineffective with drugs. At stopping antiarrhythmic drugs more than half-lives, ablation energy was 15～40?W. The criterion of successfully instant ablation was ventricular tachycardia disappearance after discharge in 10 sec. No tachycardia was induced by the same parameters of pre-balation and isoprotererol through vein. The standard of successful follow-up was no ventricular tachycardia. Results: Among 27 cases, 11 cases of accessory pathways originated from right ventricular out-flow tract, 2 cases right ventricular free-wall, 1 case apex of heart of right ventricular, 12 cases left postoseptal, 1 case right ventricular out flow united left ventricular postoseptal. 26 cases were successful instantly, successful rate was 96 3%, 3 cases were recurrent in the half month, 2nd month and 5th month respectively after operation during 3 month to 4 year follow-up. Repeated ablation was successful in recurrent patients and no complications occurred. Conclusion: Successful rate of radiofrequency catheter ablation of idiopathic ventricular tachycardia is much higher and complications are less. Radiofrequency catheter ablation should be considered as the first therapy method for idiopathic ventricular tachycardial. Fast ventricular response can be regarded as the criterion for effective ablation during idiopathic ventricular tachycardia of radiofrequency catheter ablation.