A ventricular septal defect (VSD) can be classified based on its anatomic features.
|
Defect
|
Synonyms
|
Type
|
|
in the conal or outlet septum, just beneath the semilunar valve(s)
|
subarterial, supracristal, conal, infundibular
|
1
|
|
confluent with and involves the membranous septum; bordered by an atrioventicular valve
|
perimembranous, paramembranous, conoventricular
|
2
|
|
in the inlet of the right ventricular septum, immediately inferior to the AV valve apparatus
|
inlet, AV canal type
|
3
|
|
defect completely surrounded by muscle
|
muscular
|
4
|
|
defect in the membranous septum with a connection between the right atrium and left ventricle
|
LV-RA fistula
|
Gerbode
|
|
none of the above
|
|
NOS
|
If more than 1 type is present, then it is classified as multiple VSD.
