Williams syndrome associated with complete atrioventricular septal defect

Williams syndrome associated with complete atrioventricular septal defect:

"To our knowledge, this is the first description in the literature of a long follow up period of Williams syndrome associated with complete atrioventricular septal defect. During 10 years’ follow up, the pressure gradient in the ascending aorta did not increase despite the narrowing of the ascending aorta seen on the aortogram."