Description : The term 'atrioventricular septal defect' (AVSD) covers a spectrum of congenital heart
malformations characterized by a common atrioventricular junction coexisting with
deficient atrioventricular septation. In ostium primum atrial septal defect (ASD)
there are separate atrioventricular valvar orifices despite a common junction, whereas
in complete AVSD the valve itself is also shared (summary by Craig, 2006).;
Inheritance : Autosomal dominant;
Molecular basis : Caused by mutation in the GATA-binding protein-6 gene (GATA6, 601656.0004);