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Abstract Objective To explore the efficacy and safety of catheter radiofrequency ablation (RF)for idiopathic premature ventricular contraction (PVC) and ventricular tachycardia (VT) from different origins. Methods RF was performed with a conventional catheter or an irrigated- tip catheter in 828 patients with PVC/VT under the guidance of X- ray image or three- dimensional mapping systems. The advantage and disadvantage of different mapping and ablation strategies for different PVC/VT were analyzed. Results 580 cases had PVC/VT originating from right ventricle (70.05%) and 248 from left ventricle (29.95%). Right ventricular outflow tract was the most common site (56.64%), fol owed by left ventricular septum, left ventricular outflow tract and tricuspid annulus. Success rate of ablation was 95.52% for right ventricular origin and 87.50% for left ventricular origin. Conventional catheter with temperature control was used in endocardial ablation, and irrigated- tip catheter was required in epicardial ablation via coronary sinus ostium. Conclusion RF is safety and efficacy for idiopathic PVC/VT with a higher success rate for those from right ventricle.
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