mitral atresia

例句：

1. 1.Mitral atresia is a condition that affects the heart's ability to pump blood effectively.
   二尖瓣闭锁是一种影响心脏泵血效率的疾病。
2. 2.In mitral atresia, the valve between the left atrium and ventricle does not open fully.
   在二尖瓣闭锁中，左心房与左心室之间的阀门没有完全打开。
3. 3.Mitral atresia can lead to serious complications if left untreated.
   未经治疗的二尖瓣闭锁可能导致严重的并发症。