肺动静脉瘘(pul monary arteriovenous fistula,PAVF)是指肺动脉与肺静脉(95%)或体循环动脉与肺静脉(5%)间的异常血管交通,较严重患者常有不同程度紫绀、杵状指及劳力性呼吸困难,甚至可引起脑梗死、致命性大咯血等并发症[1],多数情况下动静脉瘘会逐渐增大,极少自发萎缩,未治疗? Pulmonary arteriovenous fistula (PAVF) refers to the abnormal vascular traffic between the pulmonary artery and the pulmonary vein (95%) or between the systemic and pulmonary veins (5%). More severe patients often have cyanosis, clubbing and labor Sexual dyspnea can even cause complications such as cerebral infarction and fatal hemoptysis [1]. In most cases, the arteriovenous fistula gradually increases, with very few spontaneous atrophy and no treatment.