Tetralogy of Fallot – Definition
Tetralogy of Fallot (TOF) is a combination of four heart defects. It is present at birth. These defects make it difficult for your child to get oxygen to the entire body.
The four defects are:
- Ventricular septal defect (VSD) — A hole in the heart. It is on a wall that separates the two lower chambers.
- Transposition — A major blood vessel (aorta) is in the wrong place.
- Pulmonary stenosis — The valve in the heart that allows blood to pass from the heart toward the lungs is too narrow.
- Right ventricular hypertrophy — The muscle on the right side of the heart is too thick.