她随即急产，但产下的婴儿无呼吸、无哭声，全身青紫。
She later had an emergency birth, but the baby was neither breathing nor crying after leaving the womb and its skin had turned purple, it said.
法鲁四联症，也叫婴儿青紫综合症，是最常见的严重的先天性心脏缺损，一直原来原因不明。
Tetralogy of Fallot, the most common form of a serious congenital heart defect also known as blue baby syndrome, has always been something of a puzzle.
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