ST段上抬可见于哪些情况?
男孩，3岁半，患先心病无发绀。X线检查如图所示：左心室增大，主动脉影增宽，肺野充血。考虑下列哪一种诊断可能性大() ["A．动脉导管未闭","B．室间隔缺损","C．房间隔缺损","D．法洛四联症","E．艾森曼格综合征"]
期前收缩
3个月男孩，体格检查发现胸骨左缘第2肋间有Ⅲ/Ⅵ级收缩期杂音，P亢进，胸部X线示：左室、左房大，该患儿最可能的诊断是() ["A．肺动脉狭窄","B．动脉导管未闭","C．房间隔缺损","D．室间隔缺损","E．主动脉缩窄"]
动脉导管未闭的患儿，测其血压发现脉压增宽，主要是由于周围动脉() ["A．收缩压升高","B．收缩压降低","C．舒张压升高","D．舒张压降低","E．收缩压升高伴舒张压升高"]
折返性心律失常
