房室结慢径消融术后快径前传不应期变化与房室结传导特性的关系

目的对房室结慢径消融术后快径路前传不应期的变化与房室结传导特性的关系进行分析。方法分别测量４５例房室结折返性心动过速患者术前快径路前传不应期（ＦＥＲＰＢ）、术后快径路前传不应期（ＦＥＲＰＡ）及其差值（ＤＥＲＰ），术前慢径路前传时间（Ｓｐ）、快径路前传时间（Ｆｐ）及其差值（Ｄｐ），并对ＦＥＲＰＢ与ＦＥＲＰＡ进行样本均数ｔ检验，计算ＤＥＲＰ与Ｄｐ的相关系数（ｒ）。结果ＦＥＲＰＢ与ＦＥＲＰＡ分别为３５４±５８．２５ｍｓ及３１１．１４±５７．３３ｍｓ（Ｐ＜０．０１），ＤＥＲＰ与Ｄｐ呈正相关（ｒ＝０．３９８９，Ｐ＝０．０２～０．０５）。结论慢径消融术后快径路前传不应期缩短，快慢径路传导特性的差异与慢径路消融术后快径路前传不应期的变化有关。

Relation between changes of fast pathway antegrade effective refractory period after slow pathway ablation and conductive features of atrioventricular node.

Objective To analyze the relation between the changes of fast pathway antegrade effective refractory period after slow pathway ablation and the conductive features of atrioventricular node.ZMethods The antegrade effective refractory periods of fast pathway before and after operation (FERPB and FERPA) and their difference (DFRP),the antegrade conduction period of slow and fast pathway and the value of difference(Dp) were measured.The difference between FERPB and FERPA,the correlation between Dp and EERP were analyzed Results There was significant difference between FERPB and FERPA (3545825ms vs 311.145733 ms, P<001).There was a positive correlation between DERP and Dp(r=03989,P<005). Conclusion Radiofrequency ablation of slow pathway alone shortened the antegrade effective refractory period of fast pathway.The difference of fast and slow pathway conduction features was corelated with changes of fast pathway antegrade effective refractory period before and after slow pathway ablation.