The standard surgical treatment of the supravalvar aortic stenosis is characterized by the ampliation of one or more sinus of Valsalva utilizing patch of prosthetic material (Dacron, bovine pericardium) with or without transsection of the aorta. One possible limitation on late results with these procedures is the fact of graft thickening or calcification, difficulting the aortic root growing, mainly when the patient is a child. In order to avoid this complication, we propose a new technical modification that effectivelly increases the aortic diameter, without the use of prosthetic material, using only the normal ascending aortic wall to reconstruct and enlarge the stenotic area. We performed this procedure in 4 patients with ages ranging from 23 months to 38 years old (m - 14, 5, Y. O,), weighing from 10 to 56 kg (m - 26,2 kg). The three young patients had sings of Williams syndrome. The gradients between left ventricle and aorta were 50, 70, 100 and 100 mmHg. Cristaloid cardioplegia was infunded antegrately. The ascending aorta was entirely mobilized. After aortic transsection immediately above the stenotic point, we made vertical incisions from the free edge to the botton of the Valsalva sinuses. Sometimes the size and position of the left coronary ostium impedes the incision on the left Valsalva sinus. On the distal aorta we made three longitudinal incisions in the position corresponding to the comissures of the aortic valve. Suturing these two parts we reconstructed the aortic root anatomicaly. The four patients had uneventful hospitalization and were discharged in good clinical condition. With a follow-up from 1 to 6 months, all the patients are assymptomatic.
supravalvar aortic stenosis; heart valve, aortic