This may occur when the child becomes agitated and is termed Hypercyanotic or tetralogy spell tet spell. Such spells typically occur in children older than six months of age. Tetralogy of Fallot is incompatible with normal life. Surgical repair is the only treatment available. This is done at about 6 to 9 months of age.
Some centers perform repair earlier.
The surgery is an open heart surgery. The surgeon enlarges the RVOT and pulmonary valve openings, thus relieving the obstruction to blood flow. The VSD is closed with a patch. Complications Unrepaired, this heart defect will cause the right ventricle to progressively enlarge, resulting in right heart failure. In addition, the clots which normally form in our veins are filtered in the lungs, however, in this heart lesion since some of the blue blood returning from the veins may cross to the left ventricle and be pumped out to the body without being filtered through the lungs it may result in these clots to go to the body causing damage such as stroke or kidney damage.