目的评价Carto三维标测系统联合单根Lasso电极指导心房颤动(简称房颤)导管射频消融的效果。方法4例阵发性房颤患者,其中1例伴阵发性房扑,3例男性、1例女性,年龄(52±10)岁,房颤发作期限(3.3±1.8)年。术前心脏CT成像,术中运用Carto系统重建左房三维结构,并指导导管标测和消融;以冷肝素盐水灌注导管,行环肺静脉消融和左房顶部的线性消融术,消融完毕后,如患者仍显示为房颤,遂给予心律平70mg静脉注射,未见房颤复律,再给予100J行同步电复律。术后随访观察。结果4例均消融成功,平均消融导管射频消融(43±6)min,曝光时间为(48±7)min,未发生心脏穿孔和肺静脉狭窄等严重并发症,随访4~12个月无复发病例。结论联合应用Carto三维标测系统和单根Lasso电极指导进行房颤导管射频消融安全有效,使用单根Lasso电极较使用双根Lasso电极可以显著降低消融成本。 Objective To evaluate the radiofrequency ablation effect of Carto’s three-dimensional mapping system combined with a single Lasso electrode to guide atrial fibrillation (AF). Methods Four patients with paroxysmal atrial fibrillation, including one with paroxysmal atrial flutter, three males and one females, were aged 52 ± 10 years and had a duration of atrial fibrillation (3.3 ± 1.8) years. Preoperative cardiac CT imaging, intraoperative use of Carto system reconstruction of left atrium three-dimensional structure, and guide catheter mapping and ablation; cold heparin saline catheter, circumferential pulmonary vein ablation and left atrial top of the linear ablation, ablation is completed, such as Patients still showed atrial fibrillation, then administered 70mg intravenous rhythm, no atrial fibrillation cardioversion, and then given 100J line synchronized cardioversion. Follow-up postoperative observation. Results The ablation was successful in all 4 cases. The mean ablation catheter radiofrequency ablation was (43 ± 6) min and the exposure time was (48 ± 7) min. There were no serious complications such as cardiac perforation and pulmonary vein stenosis. No recurrence was observed in 4 to 12 months . Conclusions The combination of Carto 3D mapping system and single Lasso electrode is safe and effective for the radiofrequency ablation of atrial fibrillation catheter. Compared with the single Lasso electrode, the single Lasso electrode can significantly reduce the ablation cost.