问题
单项选择题
男性，21岁，反复发作性心悸胸闷，再次发作来急诊，就诊时心电图示：心率220次／分，节律绝对规则，QRS波0．10秒，每个QRS波后可见清晰逆行P′波，R-P′间期70ms。心电图诊断应考虑（）。
A.阵发性室性心动过速
B.房室结折返性心动过速
C.心房扑动
D.房室折返性心动过速
E.心房颤动
答案
参考答案：B
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男性，21岁，反复发作性心悸胸闷，再次发作来急诊，就诊时心电图示：心率220次／分，节律绝对规则，QRS波0．10秒，每个QRS波后可见清晰逆行P′波，R-P′间期70ms。心电图诊断应考虑（）。
A.阵发性室性心动过速
B.房室结折返性心动过速
C.心房扑动
D.房室折返性心动过速
E.心房颤动
参考答案：B
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