Abstract

Abstract and Figures Background: To investigate the relationship between the location of accessory pathways, electrophysiologic characteristics and ablation success in WPW syndrome. Methods: Electrophysiologic study (EPS) was performed in 178 patients for a pre-excitation syndrome. AP location, anterograde or retrograde conduction, ablation success and recurrence rate were evaluated. Results: Among 178 patient with WPW syndrome, the most frequent location of accessory pathway was left lateral (39.3%) which had high ablation success rate (97%) and low recurrence rate (1%). A meaningful relationship exist between accessory pathway location and electrophysiologic characteristics. Ablation success rate was 89.7% and was statistically related to accessory pathway location. Recurrent occurred in 2.9% of our patients and was more frequent in right free wall and PJRT. Conclusions: The location of accessory pathways has a great impact on conductivity, ablation success and recurrence rate in WPW syndrome.