endocardial cushion

例句：

1. 1. The patient's heart conditionrequired a surgical procedure to remove the endocardial cushion.
   患者的心脏状况需要手术来移除心内膜垫。
2. 2. During surgery, the surgeon carefully removed the endocardial cushion to prevent further damage to theheart.
   在手术过程中，外科医生小心翼翼地移除了心内膜垫，以防止对心脏的进一步损害。
3. 3. Theendocardial cushion playsa crucial role in maintaining theproper functioning of the heart valves.
   心内膜垫在保持心脏瓣膜正常功能方面起着至关重要的作用。