The switch back ross operation: report of two cases - Vicente, Walter Villela de Andrade; Ferreira, C. A.; Klamt, Jyrson Guilherme; Manso, P. H.; Almeida Filho, O. C.; Carlotti, Ana Paula de Carvalho Panzeri; Arantes, L.; Haddad, J. (World Congress of Paediatric cardiology and cardiac Surgery (PCCS), 2009)