本文用经食管超声（ＴＥＥ）监测观察术中不同时期的心功能变化，并将体外循环终了时降低的左室射血分数（ＥＦ）及手术终了时恢复的ＥＦ与围手术期心输出指数（ＣＩ）、左室搏出作功指数（ＬＶＳＷＩ）等进行了比较。结果表明：术中ＴＥＥ检测的心功能可预测术后经过情况，特别是体外循环终了时ＥＦ显著低下者，多有术后围手术期心功能不全，应列为重点监护对象。 In this paper, the changes of cardiac function in different periods during operation were observed by TEE, and the left ventricular ejection fraction (EF) CI), left ventricular stroke work index (LVSWI) were compared. The results showed that the intraoperative TEE detection of cardiac function can predict the situation after surgery, especially at the end of cardiopulmonary bypass was significantly lower EF, and more postoperative perioperative cardiac dysfunction, should be classified as the key care object.