Causes & Risk Factors Of Tetralogy Of Fallot

Tetralogy of Fallot is a congenital heart defect with four major problems: pulmonary stenosis, ventricular septal defect, right ventricular hypertrophy, and an overriding aorta. With pulmonary stenosis, blood has difficulty exiting the right ventricle, and a ventricular septal defect creates a hole between the left and right ventricle. When there is right ventricular hypertrophy, the ventricular muscle is thickened, and an overriding aorta is an aorta placed in the wrong position. The aorta develops on the left ventricle instead of the right and makes oxygenated and deoxygenated blood mix. The causes of Tetralogy of Fallot are not really known.