Endocardial Cushion Defects

Cushion Defect, Endocardial; Cushion Defects, Endocardial; Defect, Endocardial Cushion; Defects, Endocardial Cushion; Endocardial Cushion Defect; Ostium Primum, Persistent; Primum, Persistent Ostium
A spectrum of septal defects associated with persistence of the embryonic atrioventricular canal due to incomplete growth and fusion of the endocardial cushion.