Surgical retrieval of embolized atrial septum defect closure device from right pulmonary veinYu Xiong1, Yongjun Qian2#1 Operating Room, Department of Anesthesiology, West China Hospital, Sichuan University/West China School of Nursing, Sichuan University, Chengdu, Sichuan, China.2 Department of Cardiovascular Surgery, West China Hospital, Sichuan University, Guoxuexiang 37th, 610041 Chengdu, Sichuan, P.R. China.# Correspondence: Yongjun Qian, No. 37 GuoXue Xiang, Chengdu, Sichuan, 610041, People’s Republic of China; fax: + 86 28 85422897; e-mail: [email protected] .