of the 7 vsd types in va concordant hearts , the 3 that occur most frequently -- central muscular ( 26 % ) , perimembranous with leftward malalignment of the outlet septum ( 18 % ) and perimembranous with overriding posterior artery ( 15 % ) -- were absent in va discordant hearts .
C0018818
vsd
C0018787
hearts