Background
Truncus arteriosus (TA) represents 1% to 3% of congenital heart malformations and carries high mortality if untreated. Surgical correction requires the construction of the right ventricular outflow tract, reconstruction of the aorta, closure of the ventricular septal defect and repair of the truncal valve (TV) if needed. The aim of this cohort is to analyse the results of our TA patients who underwent surgical correction during 10 years.

Material and Methods
Between 2001-2010, 24 patients with the diagnosis of TA were operated. The average age was 19,25 months (range 1month-9.3years). 13patients (54%) presented associated anomalies. For the reconstruction of the RVOT, different conduits have been used: 19xenografts and 4aortic cryopreserved homografts. 1patient had direct connection. Regarding to TV, 7patients presented severe insufficiency: six had a valvuloplasty, one had an aortic homograft during initial correction.

Results
Mortality rate was estimated at 4%(1patient). The cause of the death was pulmonary hypertensive crisis after 1day of the complete correction. The freedom from reoperation was 95%, 78%, 78% and 62% at 2, 5, 7 and 10 years respectively. The freedom from reoperation according to reconstruction of RVOT was 95%, 90%, 90% and 70% at 2, 5, 7, 10 years respectively; with xenograft was 90% and with homograft was 75% at 5 years. Four patients underwent reoperation on the TV.

Conclusion
Surgical treatment of TA before the development of irreversible pulmonary hypertension presents good life expectancy in long term. The associated malformation of TV and use of valved conduits constitutes the major causes for reoperation.