单选题:慢性肺心病心力衰竭时,以下哪种情况下使用强心剂(  )

题目内容:
慢性肺心病心力衰竭时,以下哪种情况下使用强心剂(  ) A.感染已控制,利尿剂无效
B.心率大于120次/分
C.明显气急发绀
D.两肺底湿性哕音
E.肺动脉高压
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答案解析:

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