Prenatal Detection of Congenital Heart Diseases: One-Year Survey Performing a Screening Protocol in a Single Reference Center in Brazil

Table 1

Classification system of fetal heart diseases used according to complexity of the heart anatomical abnormalities.

Classification	Fetal heart diseases
Complex	Heterotaxy or atrial isomerism, atresia or severe hypoplasia of a valve or chamber (hypoplastic left heart syndrome, pulmonary atresia, tricuspid atresia, aortic atresia, mitral atresia, and Ebstein’s anomaly), and abnormalities of the valve inlet or outlet (complete atrioventricular septal defect, truncus arteriosus, double inlet left or right ventricle, and double outlet left or right ventricle congenitally corrected transposition of the great arteries)
Significant	Transposition of the great vessels, tetralogy of Fallot, large ventricular septal defect, coarctation of the aorta, aortopulmonary window, critical aortic or pulmonary stenosis, partial atrioventricular septal defect, total anomalous pulmonary venous connection, and tricuspid valve dysplasia (no Ebstein’s anomaly)
Minor	Small ventricular septal defect and less severe aortic or pulmonary stenosis
Others	Dysrhythmias, cardiomyopathies, secondary dextrocardia/levocardia, pulmonary sequestration, and restrictive ductus arteriosus

∗This classification was adapted from Hunter et al. [17] and Wren et al. [18].