Introduction: Atrioventricular nodal reentrant tachycardia is quite common in clinical. The use of radiofrequency for this condition is more common. However, there are few studies on the impact of slow pathway ablation on AV conduction.Objectives: To investigate the impact of slow pathway ablation on AV conduction in atrioventricular nodal reentrant tachycardia. Subjects and method: Between Jul 2003 to Jul 2006, 27 patients with typical atrioventricular nodal reentrant tachycardia underwent the slow pathway eradication using radiofrequency. Some AV conduction measurements before and after ablation were compared. Results: There is a significant difference in sinus interval before and after ablation (745.81 +/- 136.63ms vs. 634.61+/-148.82ms, p<0.05). The differences in PA interval (32.03+/-8.71ms vs. 34.15+/-9.36ms), AH interval (67.72+/-18.66ms vs. 69.31+/-25.92ms), Wenckebach AV nodal block (316.32+/-52.13ms vs. 338.16+/-65.52ms), 2:1 AV block (245.95+/-78.46ms vs. 251.62+/-65.31ms) were all not significant. . The fast pathway refractory periods before and after ablation was 358.31+/-68.67ms and 362.48+/-92.11ms, respectively. Conclusion: The slow pathway eradication by radiofrequency for atrioventricular nodal reentrant tachycardia has no impact on the AV conduction.
Atrioventricular nodal reentrant tachycardia ; Slow pathway ; Ablation