婴幼儿先天性心脏病(先心病)伴反复下呼吸道感染31例,其中无紫绀型27例,紫绀型4例,无紫绀型中以室间隔缺损(VSD)为乡(70.97%)。先心病患者下呼吸道感染病程长(平均21.8天,最长84天),且反复发生(每人前后住院2～9次),心功能不全发生率72.2%。对婴幼儿先心病易反复下呼吸道感染的病因、病理机制及治疗进行了讨论。 There were 31 cases of congenital heart disease (congenital heart disease) and recurrent lower respiratory tract infection in infants and young children. Among them, 27 cases were cyanotic without cyanosis and 4 cases were cyanotic. The other was cyanosis with VSD (70.97%). Patients with congenital heart disease lower respiratory tract infection duration (average 21.8 days, up to 84 days), and repeated (before and after hospitalization 2 to 9 times), 72.2% incidence of cardiac insufficiency. Etiology of infants and young children prone to repeated lower respiratory tract infection etiology, pathology and treatment were discussed.