[ objective ] to reduce the mortality of patients after heart surgery with a goal - directed therapy algorithm . [ methods ] prospective study of patients undergoing surgery utilizing a goal - directed therapy algorithm in the postoperative period 摘要目的对于心脏术后的患者给予连续监测血乳酸,并根据血乳酸水平调整治疗方案,以确定这种方法是否能改善患者的预后。