###### Congenital malformations of the circulatory system (Q20-Q28)
Q20 Congenital malformations of cardiac chambers and connections
**_Excl.: dextrocardia with situs inversus (Q89.3)_**

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

**Q20.0 Common arterial trunk**

Persistent truncus arteriosus

**Q20.1 Double outlet right ventricle**

Taussig-Bing syndrome

**Q20.2 Double outlet left ventricle**

**Q20.3 Discordant ventriculoarterial connection**

Dextrotransposition of aorta
Transposition of great vessels (complete)

**Q20.4 Double inlet ventricle**

Common ventricle
Cor triloculare biatriatum
Single ventricle

**Q20.5 Discordant atrioventricular connection**

Corrected transposition
Laevotransposition
Ventricular inversion

**Q20.6 Isomerism of atrial appendages**

Isomerism of atrial appendages with asplenia or
polysplenia

**Q20.8 Other congenital malformations of cardiac**

**chambers and connections**

**Q20.9 Congenital malformation of cardiac**

**chambers and connections, unspecified**