Improving prenatal detection of major congenital heart disease

National surgical registries in the UK and USA record surgical and interventional congenital heart disease (CHD) procedures. They are externally verified and indicate whether an infant had an antenatal diagnosis (AD). We distinguish antenatal diagnosis from prenatal detection, here, as the former only includes live born children surviving to reach a cardiac unit who are offered cardiac surgery or interventional catheter. The UK database (NICOR-Congenital) publishes outcome data on a public portal and, since 2004, has published average AD data by healthcare region.1 Several maternity hospitals lie within each region, but without maternity data to identify place of screening or feedback from cardiac centres, most maternity units and private obstetric practices do not know their individual screening performance.