| Namespace | MPheno.ontology | Obsolete | false |
| description | a type of atrioventricular septal defect in which a single atrioventricular valve annulus, a common atrioventricular valve, and a defect of the inlet ventricular septum are observed; deficiency of the atrioventricular septum also results in the presence of a large primum atrial septal defect |
