Tetralogy of Fallot is one of the most common congenital heart disorders.Congenital heart defects are the leading cause of birth defect- related deaths  , infants morbidity and mortality[1,3] , heart failure and dilated cardiomyopathy. Tetralogy of Fallot may be associated with chromosomal abnormalities, such as 22 q11 deletion syndrome. [1,2] It occurs in about 5 out of every 10.000 babies[1,2]. The defect affects boys and girls equally[2,3] . Tetralogy of Fallot is typically treated by open heart surgery in the first year of life. The timing of the surgery will depend on how narrow the pulmonary artery is. In untreated cases, TOF carries a 35 % mortality rate in the first year of life, and a 50% mortality rate in the first three years of life. Surgery is preferably done at or about 12 months of age. Although congenital heart defects are the leading causes of birth-related deaths, infants morbidity and mortality, the experience shows, that in case of the right treatment the baby will be healthy and will have a excellent quality of life.