text: 2.心内膜炎主要侵犯二尖瓣和/或主动脉瓣，造成关闭不全；二尖瓣关闭不全表现为心尖部2～3/6级吹风样全收缩期杂音，向腋下传导，有时可闻及二尖瓣相对狭窄所致舒张中期杂音；主动脉瓣关闭不全时胸骨左缘第三肋间可闻及舒张期叹气样杂音；急性期瓣膜损害多为充血性水肿，恢复期可渐消失；多次复发可造成心瓣膜永久性瘢痕形成，导致风湿性心瓣膜病。
entities.entity: 心内膜炎
entities.label: dis
entities.entity: 二尖瓣
entities.label: bod
entities.entity: 主动脉瓣
entities.label: bod
entities.entity: 关闭不全
entities.label: sym
entities.entity: 二尖瓣
entities.label: bod
entities.entity: 心尖部
entities.label: bod
entities.entity: 腋下
entities.label: bod
entities.entity: 二尖瓣
entities.label: bod
entities.entity: 有时可闻及二尖瓣相对狭窄所致舒张中期杂音
entities.label: sym
entities.entity: 心瓣膜
entities.label: bod
entities.entity: 风湿性心瓣膜病
entities.label: dis