[Arterial switch operation for transposition of the great arteries without use of prosthetic material]

For transposition of the great arteries (TGA), arterial switch operation (ASO) is theoretically preferable to atrial switch operation, since the left ventricle is established as the systemic ventricle and sinus node function is maintained. However, ASO is a delicate operation requiring the transfer of the coronary arteries. Use of prosthetic material for reconstruction of the neo-pulmonary artery causes postoperative supra-valvular pulmonary arterial stenosis. Five neonates and young infants with TGA underwent ASO without the use of prosthetic material by the technique reported by Pacifico et al. Three patients with simple TGA ranged in age from 10 to 27 days, and in weight from 2.9 to 3.9 kg. Two patients with TGA and ventricular septal defect ranged in age from 41 to 63 days, and in weight from 2.8 to 4.2 kg. There were no deaths, either early or late, and all patients are well 7 to 21 months after surgery. Catheterization and Doppler echocardiographic studies performed in all patients showed that pressure gradient between the right ventricle and pulmonary artery decreased significantly during mean follow-up period of 14 months. These results suggest excellent growth of the pulmonary artery after surgery.