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【单选题】
男,74岁。突发剧烈心前区疼痛,胸闷,气憋,心界向左扩大,心尖区III级收缩期吹风样杂音,心率96次/分,心律不齐,双肺底湿性哕音。心电图示:I、8VL、V,、V6导联ST段抬高,I、aVL导联有异常Q波,室性期前收缩。血清CK-MB 200U。诊断是
A.
急性心包炎，肺部感染
B.
急性前侧壁心肌梗死
C.
扩张型心肌病，心力衰竭
D.
风心病二尖瓣关闭不全
E.
风心病二尖瓣狭窄
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