患者女性,56岁。因“阵发性心房颤动(简称房颤)”药物治疗无效入院行房颤射频消融治疗。消融前左房-肺静脉CT提示左下肺静脉开口于左房后壁,常规选择性左上肺静脉造影发现左下肺静脉开口未显影,Carto-merge指导下行双侧环肺静脉线性消融。术后随访3月余,维持稳定窦性心律。 Patient female, 56 years old. Because of “paroxysmal atrial fibrillation (referred to as atrial fibrillation) ” drug treatment is invalid admission radiofrequency ablation of atrial fibrillation. Left atrial-pulmonary venous CT before ablation prompted the opening of the left lower posterior pulmonary veins in the posterior wall of the left atrium. Conventional left upper pulmonary venous angiography showed no opening of the left lower pulmonary veins. Carto-merge was used to guide the linear ablation of bilateral circumferential pulmonary veins. Follow-up more than 3 months after surgery to maintain stable sinus rhythm.