mitralism

例句：

1. 1.Mitral valve disease is a common cause of heart failure in young people.
   二尖瓣脱垂是年轻人心脏病发作的常见原因。
2. 2.The patient was diagnosed with mitral valve disease and required surgery.
   患者被诊断出患有二尖瓣脱垂，需要手术治疗。
3. 3. Mitral valve disease can lead to atrial fibrillation, which can be life-threatening.
   二尖瓣脱垂可能导致房颤，这是一种危及生命的疾病。