In a 17.5-year-old boy and a 21-month-old girl orthotopic heart transplantation was performed after intractable right-heart failure had developed 14.5 years and 15 months respectively after Senning operation for TGA. Before the atrial repair, combined with closure of the VSD in each case, initial operation had involved a banding of the pulmonary artery in the boy and a modified Blalock-Taussig shunt in the girl. A coarctation of the first patient remained untreated. After resection of the diseased organ a new intraatrial septum of glutaraldehyde-fixed bovine pericardium was created. 15 and 3 months respectively after orthotopic heart transplantation both patients belong to NYHA classification I.