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男性，38岁。1年来活动后气促，伴腹胀及双下肢水肿，自述既往无不适，生活工作正常。查体：BP 100／60mmHg，颈静脉怒张，双肺底可闻及湿性啰音，心界向两侧扩大，S1减弱，心尖部可闻及3／6级收缩期杂音，肝肋下3cm，双下肢凹陷性水肿。该患者最可能的诊断是

A.冠心病
B.扩张型心肌病
C.肥厚型心肌病
D.风湿性心脏病
E.缩窄性心包炎

【参考答案】

B
心界向两侧扩大是诊断扩张型心肌病较有价值的体征。扩张型心肌病患者可有心尖部杂音，颈静脉怒张，肝脏肿大，水肿等......

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