The risks of Tetralogy of Fallot surgery are generally similar to those of general open-heart surgery. However, some potential post-operative complications specific to Tetralogy of Fallot include:

* Cardiac arrhythmia (heart rhythm disorders)
* Incomplete closure of the ventricular septal defect (hole between the ventricles)
* Incomplete relief of right ventricular outflow tract obstruction
* Pulmonary valve insufficiency (leakage in the pulmonary valve), which may lead to right ventricular enlargement and require further intervention over time.
* Aortic root dilation (enlargement of the aortic root)