NCIt synonyms : Common Atrioventricular Canal; Endocardial Cushion Defect; Common AV Canal; AV Septal Defect;
NCIt definition : A congenital heart malformation characterized by abnormalities in the anatomic structures
that relate to the endocardial cushions. These abnormalities can include defects in
the lower part of the atrial septum and the ventricular septum and lack of separation
of the mitral and tricuspid valves.;