题目内容：
下列选项中，不属于常见的二尖瓣关闭不全病因的是A、感染性心内膜炎;
B、急性心肌梗死;
C、心脏瓣膜手术;
D、扩张型心肌病;
E、二尖瓣置换术后;
参考答案：
选择题：下列选项中，不属于常见的二尖瓣关闭不全病因的是
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