射频消融房室结折返性心动过速术后慢径残存与复发的关系

目的探讨房室结折返性心动过速(AVNRT)射频电消融(RFCA)术后慢径残存与复发的关系。方法对202例AVNRT患者RFCA术后进行随访，回顾性分析其电生理资料。结果202例中12例复发，复发率5.9%，复发组9例(75.0%)术后慢径残存，非复发组17例(8.9%)慢径残存，二者比较差异有非常显著性(P<0.01)，慢径残存患者复发率高。将202例患者分为三组，既无双径现象又无交界性回波(A组)176例，3例复发，有双径现象无交界性回波(B组)23例，6例复发，既有双径现象又有交界性回波(C组)3例，均复发。结论AVNRT复发电生理基础是房室结双径路，应尽可能消除双径现象，并去除交界性回波。

STUDY OF RECURRENCE OF ATRIOVENTRICULAR NODAL REENTRANT TACHYCARDIA AFTER RADIOFREQUENCY CATHETER ABLATION

Objective:To determine the relationship between the slow pathway and the recurrence of atrioventricular nodal reentrant tachycardia (AVNRT) after radiofrequency catheter ablation (RFCA).Methods:202 consecutive patients with AVNRT after radiofrequency atrioventricular node modification were followed up and their electrophysiologic datas were retrospectively investigated.Results:Clinical recurrence of AVNRT was documented in 12 patients (recurrence group) from 202 patients and no recurrence in 190 patients (no recurrence group),the recurrent rate was 5.9%,9(75.0%) patients with dual atrioventricular nodal pathway (DAVNP)in recurrence group,17(8.9%) patients in no recurrence group,There was significant difference between the two groups (P<0.01).After RFCA procedure,176 patients had neither dual atrioventricular nodal pathway (DAVNP) nor junctional echos (group A),23 patients had DAVNP without a juctional echo (group B),3 patients had both DAVNP and junctional echos (group C),the recurrent rate was 1.8%(3/176),26.1%(6/23),100.0%(3/3) respectively.Significant difference presented among the 3 groups.Conclusions:In order to avoid recurrence of AVNRT,after RFCA,the physiology of dual pathway and junctional echos must be no longer persistent.