Objective To summarize the experience of the management and method in cardiopulmonary bypass(CPB) with mitral valve surgery by video-assisted thoracoscopy. Methods From January 2013 to June 2017, the clinical data of 80 patients underwent mitral vavle replacement by video-assisted thoracoscopic were reviewed and analyzed. Mild and moderate hypothermia were used in cardiopulmonary bypass(CPB). CPB cannulas of all the patients were established through femoral artery and vein. Vacuum-assisted venous drainage w...