Also,4 out of 5 cases with the highest ET1 concentrations within 24 hours postnatal died,and 5 out of 14 cases with ?ET1? concentrations over the normal range on postnatal day 7 were diagnosed as brain atrophy by CT scan 3 months later.

• 生后24小时内ET1浓度最高的5例患儿4例死亡，第7日ET1浓度高于正常值上限的14例中5例3个月后头颅CT显示有脑萎缩。