劍橋詞典a birth defect of the heart in which a temporary blood vessel that supplies the unborn child does not close at birth 動脈導(dǎo)管未閉 The main sign of patent ductus arteriosus is a mechanical hum from the heart . 動脈導(dǎo)管未閉的主要跡象是心臟部分有機械嗡嗡聲。 返回 patent ductus arteriosus