房室结折返性心动过速射频消融术中特殊病例分析

在２６０例房室结折返性心动过速（ＡＶＮＲＴ）射频消融中出现１１例特殊病例。其中男３例、女８例。５例属电生理现象复杂，其中１例快－慢型者Ｓ１Ｓ１５００ｍｓ心室刺激时，连续３个刺激便出现室房文氏现象，随之出现心动过速，ＡＶＮＲＴ时心室率１８２ｂｐｍ，Ｈｉｓ束电极Ａ波最先激动，呈Ａ－Ｈ－Ｖ传导，ＶＡ间期２２０ｍｓ，ＶＡ＞ＡＶ；另１例快－慢型者心内电生理诱发出典型ＡＶＮＲＴ，其频率１６２ｂｐｍ，对其慢径改良后，诱发出另一种频率的快－慢型ＡＶＮＲＴ。３例慢－慢型者心动过速较易诱发，ＡＶＮＲＴ时均以冠状静脉窦口（ＣＳＯ）Ａ波最提前，Ｈｉｓ束电极示Ｈ－Ｖ－Ａ传导。３例永存左上腔静脉，ＣＳＯ异常扩张，窦口上缘几乎接近Ｈｉｓ束水平。３例放电过程特殊者，其中１例在较大范围内消融，均出现慢交界区心律，另１例在消融中出现一个交界区心律后，便诱发ＡＶＮＲＴ，再有１例为消融时难以出现慢交界律。所有病例均消融成功（１００％）。结果提示对特殊病例除应进行详细电生理检查之外，应采取不同的消融策略

Analysis of Radiofrequency Catheter Ablation for Uncommon Type of Atrioventricular Node Reentrant Tachycardia

This study analyzed reasons and mangement of radiofrequency catheter ablation (RFCA) for uncommon type of atrioventricular node reentrant tachycardia (AVNRT).3 male and 8 female in all patients,ages range from 36～62 years.Symptoms were frequent palpitation.Uncommon cases of AVNRT included atypical electrophysiological phenomenon in 5 cases,anomaly anatomy of the triangle of Kock due to left superior vena cava in 3 cases and complicated ablation procedure in 3 cases,The procedure was successful in all patients.there were no acute or late complication related to procedure.In order to get high success rate and less complication,it is necessary to perform detail electrophysiological test,ablate special position and suitable delive radiofrequency current application in the session for these cases.