From parent levels

ChapterXVIICongenital malformations, deformations and chromosomal abnormalitiesOpen

Exclusions

inborn errors of metabolism (E70-E90)

BlockQ20-Q28Congenital malformations of the circulatory systemOpen

CategoryQ20Congenital malformations of cardiac chambers and connectionsOpen

Exclusions

dextrocardia with situs inversus (Q89.3)
mirror-image atrial arrangement with situs inversus (Q89.3)

Q20.4

CategoryBlock Q20-Q28 Chapter XVII

Double inlet ventricle

Inclusions

Common ventricle
Cor triloculare biatriatum
Single ventricle

Parent: Q20 Congenital malformations of cardiac chambers and connections