[Value of fetal echocardiography in screening for congenital heart diseases. Report of 1,049 consecutive examinations].

Specialised antenatal echocardiographic screening has allowed 1049 consecutive examinations in 992 patients resident in the Aquitaine region over a period of nine years. The most frequently encountered indications are expertise (suspicion of cardiopathy during initial screening) and family history. Expertise allows a higher detection rate (46.5%) compared to the other indications. We have screened 150 cardiopathies in utero and among them 143 were able to followed up after delivery. We have noticed a much greater severity of the anomalies compared to those encountered in paediatric cardiology. An associated chromosomal anomaly was noticed in 9% of cases and more frequently for atrio-ventricular communication and conotruncal cardiopathies. The rate of abortion was 35%, and the mortality for the surviving pregnancies was elevated (35%). Pharmacological treatment was instituted in 95% of cases of sustained supraventricular tachycardia with 81% successful. Diagnosis errors concerned benign cardiopathies above all and did not change the management of the pregnancy. The sensitivity of fetal echocardiography was 93.1% and its specificity 99.1%. This study shows the viability of fetal cardiac echography for the detection of the majority of congenital cardiopathies in a population at risk and in the management of fetal cardiac rhythm disorders. Nevertheless it remains a specialised examination for which the performance depends much on the initial screening performed by gynaecologists. Although the mortality rate of the screened children is elevated, indicating the frequent parental choice of abortion and the complexities of the cardiopathies, antenatal diagnosis has allowed optimisation of the neonatal management for certain curable cardiopathies.