mitral stenosis

例句：

1. 1.Mitral stenosis is a condition that affects the heart's ability to pump blood efficiently.
   二尖瓣狭窄是一种影响心脏泵血效率的疾病。
2. 2.The patient was diagnosed with mitral stenosis and required surgery to relieve the symptoms.
   患者被诊断出患有二尖瓣狭窄，需要手术来缓解症状。
3. 3. Mitral stenosis can lead to serious complications if left untreated, so it's important to seek medical attention early.
   未经治疗的二尖瓣狭窄可能导致严重并发症，因此尽早寻求医疗帮助非常重要。