Affiliation: | a Department of Thoracic and Cardiovascular Surgery, West China Hospital, Sichuan University, Chengdu, Sichuan, People's Republic of China b Department of Echocardiography, West China Hospital, Sichuan University, Chengdu, Sichuan, People's Republic of China c Department of Anesthesiology, West China Hospital, Sichuan University, Chengdu, Sichuan, People's Republic of China |