[Anomalies of the vena cava inferior: report on four cases associated with congenital heart disease (author's transl)].

Infrahepatic interruption of the inferior vena cava with azygos continuation has been demonstrated by angiography in three patients; in a fourth case an anomalous venous channel connected the patent azygos vein and the inferior vena cava at the renal level. Cardiac defects were present in all cases.