Table 4.

CHD Classification.

CHD Classification	n	%
CHD Class Class 1: 2 ventricle, no aortic obstruction                 - Transposition of the great arteries in intact ventricular septum (n = 8)                 - Transposition of the great arteries with ventricular septal defect (n = 1)                 - Tetralogy of Fallot (n = 9)                 - Tetralogy of Fallot with pulmonary atresia (n = 1)                 - Truncus Arteriosus (n = 1)                 - Total anomalous pulmonary venous connection (n = 1)                 - Other, 2V (n = 3) Class 2: 2 ventricle, aortic obstruction                 - Ventricular septal defect with interrupted aortic arch (n = 2)                 - Coarctation of the aorta with aortic arch hypoplasia (n = 3)                 - Other, 2V* (n = 3) Class 3: 1 ventricle, no obstruction                 - Pulmonary atresia with intact ventricular septum (n=1)                 - Other, 1V (n = 8) Class 4: 1 ventricle, aortic obstruction                 - Hypoplastic Left Heart Syndrome (n = 9)                 - Other, 1V* (n = 1)	24 8 9 10	47 16 18 20
Ventricular subtype        Single        Two	19 32	37 63
Aortic obstruction subtype        No aortic obstruction        Aortic obstruction	33 18	65 35

Other, 2 V = Ebstein’s anomaly (n = 1), AV canal defect (n = 2); Other 2 V* = coarctation with atrioventricular canal defect (n = 1), aortic stenosis (n = 1), biscuspid aortic valve, abnormal mitral valve, with coarct & VSD (n = 1); Other, 1 V = double outlet right ventricle (n = 3), tricuspid atresia with ventricular septal defect and pulmonary stenosis (n = 2), heterotaxy (n = 1), right ventricle dominant atrioventricular canal defect (n = 1); Other, 1 V* = DORV w/coarctation of the aorta.