Type : Phenotype or locus, molecular basis unknown;
Alternative titles and symbols : Atrioventricular canal defect; Avc defect; Endocardial cushion defect; AVCD; ECD;
Included titles and symbols : Atrioventricular septal defect, susceptibility to, 1; AVSD1;
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).;