The definition of congenital heart disease (CHD) is the persistence of any structural abnormality of the heart or great vessels that is present at birth. Those patients with CHD who achieve adulthood are considered to have adult congenital heart disease (ACHD). This is a very heterogenous group, consisting of multiple types of lesions and various stages of repair.
A congenital heart defect (CHD) is a problem with the heart’s structure due to an abnormal foetal development. The complex four-chamber configuration of a normal heart develops from a single tube in early foetal life.