Generality
Tetralogy of Fallot is a congenital heart disease, which alters the structure of the heart, compromising its normal functioning. Affected patients present, from birth, with a bluish appearance: it is the so-called cyanosis.
The exact causes of Fallot's tetralogy are currently unknown. However, both genetic and environmental factors are believed to be responsible.
The only effective therapy is surgery, which aims to resolve the abnormalities of the heart. Without this operation, the patient cannot lead a normal life.