The lower-right part of the heart is larger than normal. It may be inherited. It can also be caused by an infection or use of drugs or alcohol early in the pregnancy. The heart forms during the first 14 to 60 days of pregnancy. Some children have no symptoms.
Symptoms vary from baby to baby.
Care Treatment depends on how serious the problems are and the age and health of the child. No care may be needed if the heart problem is small. Children with serious problems may need surgery right away. Your child may be put in the hospital to have more tests. Risks Tetralogy of Fallot can be fatal.