患者女性，26岁，有心悸、胸闷病史。心电图如图5-5所示，应诊断为（）。
A.右心室肥厚
B.后壁心肌梗死
C.下壁心肌梗死
D.下、后壁心肌梗死
E.WPW综合征
参考答案：E
解析：窦性心律，WPW综合征解析：心电图显示PR间期<0.12秒，QRS波增宽，大多数导联QRS起始部可见预激波（delta波）。根据V1导联delta波正向及以R波为主，可确定为左侧预激旁路。
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