Biological cardiovascular graft from bovine jugular vein, treated with glutaraldehyde. It functions as a valved vascular substitute for veins stricken by diverse pathologies, particularly atresia or stenosis. A one piece unit in which only the collaterals are linked. Indication: Vena® is indicated for extracardiac Fontan surgery. It is presented in sizes Ø 11*, 13, 15, 17 and 19 mm x 100 mm.