Table 1 Congenital heart disease where considerable improvement in prognosis might be expected if positive early diagnoses reached

	Prevalence per 100 000 livebirths	Cases/10 years in infants born at hospital delivering 5000 infants each year
Aortic stenosis	20	10
Coarctation of the aorta	35	18
Hypoplastic left heart	14	7
Interruption of the aortic arch	8	4
Pulmonary atresia	21	11
Transposition of the great arteries	30	15
Total anomalous pulmonary venous connection	9	5