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目的探讨拖带标测在房颤术后复发房速中的应用,以期在临床上提高标测及消融的成功率。方法 Carto三维标测系统指导下,采用多部位拖带,测定起搏后间期(PPI)及房速周长(TCL),寻找PPI-TCL<30ms的部位,明确复发房速的机制,并进行相应消融。结果 14例患者中,9例拖带标测认为大折返房速者,4例拖带标测确定局灶性房速的起源部位者,均经消融验证。1例肺静脉呈隐匿性拖带,再次隔离肺静脉时房速终止。结论 Carto三维标测系统指导下激动标测与拖带标测结合可快速准确地明确房速机制与确定消融靶点。
Objective To investigate the application of towing mapping in atrial fibrillation recurrence after atrial tachycardia in order to improve the success rate of mapping and ablation. Methods Cartesian mapping system was used to determine the time between PPI and TCL and the location of PPI-TCL <30ms. The mechanism of recurrence of atrial tachycardia was determined and carried out Ablation accordingly. Results Of the 14 patients, 9 cases were found to have a large atrial tachycardia and atrial tachycardia, and 4 cases were confirmed by ablation to determine the origin of focal atrial tachycardia. One case of pulmonary veins was occultly towed, the isolation of pulmonary veins again when the atrial tachycardia. Conclusion Carto’s three-dimensional mapping system under the guidance of the excitement mapping and drag mapping can quickly and accurately identify the mechanism of atrial tachycardia and determine the ablation target.