【鉴别诊断】无发绀患儿周围血管搏动明显伴连续性杂音，如杂音不在导管的典型部位，要考虑其他先天性或后天性心脏疾患，如主肺动脉窗、冠状动静脉瘘冠状动静脉瘘（coronaryarteriovenousfistula）、主动脉乏氏窦瘤破裂及伴室隔缺损的主动脉瓣反流。
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