22 patients ( 36.7 % ) had a single or multiple additional cardiac abnormalities including left ventricular outflow tract obstruction ( 12 cases ) , right ventricular outflow tract obstruction ( 3 cases ) , ventricular septal defect ( 6 cases ) , patent ductus arteriosus ( 5 cases ) , aortic coarctation ( 1 case ) , congenital mitral stenosis ( 1 case ) and mitral atresia associated with a single ventricle ( 1 case ) .
C0018787
cardiac
C0344760
mitral atresia