Two patients with transposition of the great arteries submitted to Jatene surgery at ages of 6 days and 6 months respectively, presented in the postoperative period stenosis of the aorto-pulmonary anastomosis. The diagnosis was made three and six years after the surgery. In both patients successful percutaneous transluminal angioplasty (PTA) was performed, respectively six months and immediately after the diagnosis. Pressure gradients decreased from 83 mmHg to 24 mmHg in the first case, and from 76 mmHg to 13 mmHg in the other case, with clear improvement of the angiographic image. Complications of the procedure did not occur in any case. This application for PTA was not previously reported and should be considered as an alternative to the surgical correction of the "new" pulmonary trunk stenosis in the Jatene surgery.