慢传导带传导阻滞作为心房扑动消融终点的意义（附Halo导管应用一例报告）

The Clinical Value of Conduction Block of Slow Conduction Area in Radiofrequency Ablation of Atrial Flutter: Utility of Halo Catheter in One Case

应用Ｈａｌｏ导管标测技术，结合冠状静脉窦与希氏束电图识别心房扑动折返环的慢传导带，在下腔静脉口到三尖瓣环峡部作射频线性消融，并以慢传导带出现双向阻滞作为心房扑动消融成功的标志，治疗了１例Ｉ型心房扑动患者。随访１个月心动过速未发。由于Ｈａｌｏ导管能在右房内全面记录右房激动顺序，便于了解峡部的传导情况，在心房扑动消融中有助于明确其诱发与终止的机制，并为慢传导带传导阻滞作为成功消融终点提供了可靠的手段。

Halo catheter mapping together with coronary sinus and His bundle electrograms are useful to demonstrate slow conduction area of reentrant circuit during atrial flutter and to identify conduction block of slow conduction area after linear radiofrequency ablation of inferior rena cava tricuspid valve annulus isthmus.One patient with type I atrial flutter was successfully ablated by utilizing conduction block of isthmus as a procedural endpoint.Her tachycardia had not recurred during the 1 months follow up.Since Halo catheter could provide a global right atrial activation sequence during pacing.Its electrodes can record from a point very close to the area of block.This offers a good specificity of confirmation of isthmus conduction block which may decrease th recurrence rate of atrial flutter.