distinct anatomic outflow tract obstruction was found in 15 of the 55 hearts with a ventricular septal defect ( vsd ) ( 27 % ) : 12 had a perimembranous defect ( predominantly extending into the infundibulum ) , 2 had an inlet , and 1 had an infundibular defect .
C0018787
hearts
C0018818
ventricular septal defect