Tetralogy of Fallot
Tetralogy of Fallot Tetralogy of Fallot is a type of congenital heart defect. Congenital means that it is present at birth. Causes Tetralogy of Fallot causes low oxygen levels in the blood. This leads to cyanosis (a bluish-purple color to the skin). The classic form includes four defects of the heart and its major blood vessels: [ ] Ventricular septal defect (hole between the right and left ventricles) [ ] Narrowing of the pulmonary outflow tract (the valve and artery that connect the heart with the lungs) [ ] Overriding aorta (the artery that carries oxygen-rich blood to the body) that is shifted over the right ventricle and ventricular septal defect, instead of coming out only from the left ventricle [ ] Thickened wall of the right ventricle (right ventricular hypertrophy) Tetralogy of Fallot is rare, but it is the most common form of cyanotic congenital heart disease. It occurs equally as often in males an