Since 1960, surgical advances have led to correction of congenital heart defects in children who otherwise may not have achieved maturity. Consequently, it became increasingly important to understand the long-term morbidity, mortality and functional status of these patients. Because of the tremendous outlay of time, money and personnel devoted to prolonging the lives of children with congenital heart defects, it was vital to examine the accomplishment of long-term goals: achievement of a normal lifespan as a functioning, effective member of society.