Comparative analysis on saturation degree of blood oxygen of normal newborns and newborns with peripheral cyanosis 唇周紫绀新生儿与正常新生儿血氧饱和度对比分析
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Ventricular septal defect ( vsd ) : a defect between the heart ' s ventricles is called a ventricular septal defect ( vsd ) which is the most common kind of congenital heart defect 法洛四联症：是最常见复杂紫绀性先天性心脏病，其病理解剖包括右心室流出道狭窄、对位异常的室间隔缺损、主动脉骑跨和右心室肥大四种病理畸形。
