简易标测法判断峡部双向传导阻滞

Simplified mapping method for verification of bidirectional isthmus block

目的探讨峡部依赖性房扑(AFL)射频导管消融(RFCA)术中验证峡部双向传导阻滞的简易标测法。方法12例AFL患者,三尖瓣环至下腔静脉之间的后位峡部行线性消融,采用省略Halo导管的简易标测法检测峡部双向传导。结果所有病例术中均达到峡部双向传导阻滞,无手术并发症。随访(16±11)个月无AFL复发,1例有阵发性房颤发作。结论简易标测法能清楚显示消融术前峡部的双向传导和术后的双向传导阻滞,可用于AFL的标测和消融。

Objective To evaluate the simplified mapping method for verification of bidirectional isthmus block in radiofrequency catheter ablation of isthmus dependent atrial flutter（AFL）. Methods Twelve patients with isthmus dependent atrial flutter were enrolled. Linear tricuspid isthmus radiofrequency ablation was performed, and isthmus bidirectional block was verified by the simplified mapping method without Halo catheter. Results Complete isthmus bidirectional conduction block was achieved at the end of the procedure without any complication. No recurrence of AFL occurred during the follow-up of（16±11） months, and one patient had episodes of paroxysmal atrial fibrillation. Conclusion Isthmus conduction prior ablation and bidirectional block post ablation could be displayed clearly by the simplified mapping method, which is suitable for mapping and ablation of isthmus dependent atrial flutter.