题目内容
房性早搏与室性早搏最具鉴别意义的是( )
2021-10-24
A.早搏的QRS波群有无宽大畸形
B.有无与提前出现的QRS波群相关P波存在
C.早搏后代偿间歇是否完全
D.早搏的T波方向是否与QRS波群方向相反
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