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Prognosis of severe congenital heart diseases: Do we overestimate the impact of prenatal diagnosis?

BACKGROUND: Prenatal diagnosis of congenital heart disease (CHD) is controversial because of unclear benefits in terms of morbidity and mortality, and issues with healthcare costs and organization.

AIM: To compare, in children with severe CHD, 1-year morbidity and mortality between prenatal and postnatal diagnosis groups.

METHODS: All pregnancies and children aged<1 year with a diagnosis of severe CHD were collected over a 5-year period from our database. Severe CHDs were defined as lethal cases, cases leading to medical termination of pregnancy, or children requiring surgery and/or interventional catheterization and/or hospitalization during their first year of life. The primary endpoint was 1-year mortality rate among live births.

RESULTS: Overall, 322 cases of severe CHD were identified; 200 had a prenatal diagnosis and there were 97 terminations of pregnancy. Of the 225 live births, 34 died before the age of 1 year. The 1-year mortality rate was not significantly different between prenatal and postnatal groups (16.7% vs. 13.9%; p=0.13). In the prenatal group, prostaglandin use was more important and precocious, duration of hospitalization stay was longer, extracardiac complications were less common and cardiac surgery was performed more frequently and later. An association with chromosomal or syndromic anomalies was a risk factor for 1-year mortality.

CONCLUSIONS: Prenatal diagnosis of severe CHD had an impact on the decision regarding termination of pregnancy, but not on the 1-year prognosis among live births. We should now use large multicentre CHD registries to determine the impact of prenatal diagnosis on postnatal management, neurological prognosis and quality of life.

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