CONGENITAL HEART DISEASES
heart diseases are heart defects due to impairing of the normal development
of the embryo heart, which occurs during the first then weeks of pregnancy.
Congenital heart diseases are among the most frequent congenital anomaly: the incidence (number of new cases of congenital heart diseases in a given population) is computed as the number of children with heart disease among the live births. Numerous studies demonstrate that the incidence is about eight cases for thousand live births; considering birthrate in Italy during the last years every year about 4000 thousands newborn come to live with heart disease.
heart diseases are more frequent than others, for example the ventricular
septal defect which represents 32% of all the congenital heart diseases,
the atrial septal defect 9%, patent ductus arteriosus and coarctation of
aorta 8%, tetralogy of Fallot 6% and transposition of the great arteries