From January 1974 trough August 2002 184 neonates with congenital heart disease underwent surgical repair in Heart Surgery Clinic of Vilnius University. It came to 3.8% of all 4813 procedures of congenital heart diseases performed. Number of neonates operations considerably increased in the latter's years, because special Department with proper technique was established. One hundred and seven neonates were operated without cardiopulmonary bypass with 36.4% postoperative mortality rate. Seventy seven neonates underwent surgery repair with cardiopulmonary bypass. Postoperative mortality rate was 67.5% in this group. Mean age of patients was 11.96+/-0.28 days. Unsatisfactory results of neonates operations with cardiopulmonary bypass, especially such as left heart hypoplasia syndrome is the main problems. The group of specialists performing repair of congenital heart diseases is working actively in the heart Surgery Clinic of Vilnius University. Improvement of surgery methods and results, following the best Heart Surgery Clinics of the world, is the main purpose of this group.