Partially anomalous pulmonary venous connection was found in two of a series of 359 patients (% 0.27) with tetralogy of Fallot. Both patients presented merely with the clinical features of tetralogy of Fallot. Anomalous pulmonary venous drainage was diagnosed by cardiac catheterisation 1 and 3 years postoperatively, performed to explain the existing slight cardiomegaly. Correction of tetralogy of Fallot without re-routing of anomalously draining vein can be performed without serious long-term sequelae if only one or two lobar vessels are affected.
Keywords: Tetralogy of Fallot, partial anomalous pulmonary venous return