The anterograde effective refractory period and Wenckebach block point were measured before and after ablation.
进行慢径路改良，观察手术前后房室结的前传有效不应期和文氏阻滞点的改变。
2
Sinus dysfunction group and sick sinus syndrome (P > 0.05), sinus recovery time were not related to Wenckebach block point and 2 : 1 block piont in patients with sick sinus syndrome(P> 0.05) .