From parent levels

ChapterXVIICongenital malformations, deformations and chromosomal abnormalitiesOpen

Exclusions

inborn errors of metabolism (E70-E90)

BlockQ20-Q28Congenital malformations of the circulatory systemOpen

CategoryQ23Congenital malformations of aortic and mitral valvesOpen

Q23.4

Hypoplastic left heart syndrome

Atresia, or marked hypoplasia of aortic orifice or valve, with hypoplasia of ascending aorta and defective development of left ventricle (with mitral valve stenosis or atresia).

Parent: Q23 Congenital malformations of aortic and mitral valves