题目内容

女，20岁。活动后胸闷、气短2天。3周前曾咳嗽，持有过发热1周。既往体健。查体:面色苍白，双肺呼吸音清，心界向左下扩大，心率120次/分，頻发早博，第一心音減弱，P2＞A2。心尖区可闻及2/6级收缩期杂音。实验室检查:血肌钙蛋白增高。该想者最可能的诊断是

A. 感染性心内膜炎
B. 病毒性心肌炎
C. 慢性心力衰竭
D. 急性肺栓塞
E. 急性心肌梗死

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女，38岁。心悸2天，无胸痛，2周前发热、流涕。査体:T36.5℃，心界不大，心率102次/分，律齐，未闻及心脏杂音和心包摩擦音。心电图示:P-R间期0.21s，余未见异常，血清肌钙蛋白升高。最可能的诊断是

A. 急性心肌梗死
B. 甲状腺功能亢进症
C. 急性心包炎
D. 急性心肌炎
E. 心肌病

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