Tetralogy of Fallot (TOF) is a cyanotic heart disease (a congenital heart defect that causes blood with lower oxygen levels to circulate in the body). It involves a combination of four cardiac anomalies: an enlarged aorta that is positioned directly above the VSD, a large ventricular septal defect (VSD), pulmonary stenosis (PS) and thickening of the wall of the right ventricle or right ventricular hypertrophy (RVH). These defects together cause oxygen-poor blood to flow to the rest of the body.
Rarer variations involve differences in the degree of PS from pulmonary atresia (PA; the pulmonary valve does not form properly and blood cannot flow from the right ventricle to the lungs) to absent pulmonary valve (the pulmonary valve did not form at all causing backflow of blood into the right ventricle).
You can learn more about Tetralogy of Fallot (TOF) here.
Tetralogy of Fallot (TOF) is a cyanotic heart disease (a congenital heart defect that causes blood with lower oxygen levels to circulate in the body). It involves a combination of four cardiac anomalies: an enlarged aorta that is positioned directly above the VSD, a large ventricular septal defect (VSD), pulmonary stenosis (PS) and thickening of the wall of the right ventricle or right ventricular hypertrophy (RVH). These defects together cause oxygen-poor blood to flow to the rest of the body.
Rarer variations involve differences in the degree of PS from pulmonary atresia (PA; the pulmonary valve does not form properly and blood cannot flow from the right ventricle to the lungs) to absent pulmonary valve (the pulmonary valve did not form at all causing backflow of blood into the right ventricle).
You can learn more about Tetralogy of Fallot (TOF) here.