Background: Radio frequent ablation has been considered the first line therapy in the management of patients with supra ventricular tachycardia due to accessory pathway.

Aim of the Study: To assess the success rate following radio frequent ablation in patient with accessory pathway in Ibn Al-Bitar Cardiac Center.Patients and Methods: This cross-sectional study was conducted in EP-study unit in Ibn Albitar center for cardiac surgery from January 2017 to January 2020.  The study included records of computerized data base of 209 patients suggested for accessory pathway referred to the unit with a request of EP study. Radio frequent ablation was performed using deflectable electrode catheters positioned at the mitral or tricuspid annulus. The site of the accessory pathway was localized by the electrophysiological study and radio frequent energy was  applied via the tip of the catheter.Results: The results of this cross sectional study showed that the mean age of 209  patients with SVT and accessory pathway was 32.81±13.18 years, and 113(54.1%) of patients had wpw syndrome, 87 (41.6) had concealed accessory pathway(AVRT), 7 (3.35%) had Mahaim accessory pathway and 2 (1%) patients had Persistent Junctional Reciprocating Tachycardia (PJRT). The study showed that patients with immediate success rate of all patient with accessory pathway involved in this study were 183  (88%), while patients with failure rate were 26 patients (12%).Conclusions: The outcomes of this study confirmed the efficacy and safety of radio frequent ablation and suggested that it is a reasonable first-line  therapy for the management of SVT with accessory pathway at any location.

Key words: Supraventricular Tachycardia, Post Radio Frequent Ablation, Accessory pathway