【单选题】【消耗次数：1】
心源性呼吸困难最先出现的是
①
端坐呼吸
②
阵发性夜间呼吸困难
③
劳力性呼吸困难
④
心源性哮喘
参考答案：
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相关题目
【单选题】
呼吸困难是指
①
剧烈运动时感到的一种气不够用的感觉
②
患者感到空气不足，呼吸费力
③
因气道狭窄而引起的气体吸入和呼出困难
④
因肺泡气体交换障碍引起的一种缺氧表现
⑤
因血含氧量降低引起的一种表现
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