Congenital heart disease in low birth weight infants.

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Abstract
In this study of low birth weight infants (less than 2500 g), we compared the birth weight distribution of patients with patent ductus arteriosus associated with prematurity with that of patients having congenital heart disease other than patent ductus arteriosus. Among 1436 low birth weight infants 37 infants had congenital heart disease other than patent ductus arteriosus and 198 had isolated ductus arteriosus. Infants with congenital heart disease had a mean birth weight of 2018 grams (standard deviation = 370 g) which was significantly greater than that of infants with patent ductus arteriosus. Four of the 37 infants with congenital heart disease other than ductus arteriosus were among 1150 low birth weight infants born in this institution, an incidence of 3.5/1000 live low birth weight infants. Seventy-eight of the 198 infants with patent ductus arteriosus were among 1150 low birth weight infants born in this institution, an incidence of 70/1000 live low birth weight infants. Twenty-one of the 37 infants with congenital heart disease were of appropriate weight for gestational age and 16 were small for gestational age.