先天性心脏病(简称先心病)是新生儿期常见的先天畸形之一,其发病率约占活产婴儿的7‰~9‰。尽管青紫型先心病的发生率低于非青紫型先心病,但由于前者在新生儿早期缺乏特异的临床症状,缺少具有鉴别意义的心脏杂音,故临床极易将其误诊为呼吸系统疾病、新生儿持续肺动脉高压(PPHN) Congenital heart disease (referred to as CHD) is one of the common congenital malformations in the neonatal period, the incidence rate of about 7 ‰ ~ 9 ‰ of live births. Although the incidence of cyanotic congenital heart disease than non-cyanosis congenital heart disease, but due to the lack of specific clinical symptoms in the early neonatal, the lack of a meaningful heart murmur, it is extremely easy to misdiagnose clinically as respiratory diseases, freshmen Children with persistent pulmonary hypertension (PPHN)