Multivariate analysis of risk factors for hospital mortality in vascular reoperations for prosthetic valve dysfunction - Brandão, Carlos M. de A.; Souza, Luciano Rapold; Grimberg, Max; Pomerantzeff, Pablo Maria Alberto; Tarasoutchi, Flávio; Ramires, Antonio F.; Oliveira, Sérgio Almeida de (Cardio-Thoracic Surgery, 2002)