Estudos anatômico e clínico da técnica de anuloplastia valvar mitral por plicatura externa em cães

• Ano de defesa: 2010
• Autor(a) principal: Olivaes, Cláudio Galvão de
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade de Franca; Brasil; Pós-Graduação; Programa de Mestrado em Cirurgia e Anestesiologia Veterinária; UNIFRAN
• Palavras-chave em Português: Valva mitral; Degeneração mixomatosa; Insuficiência cardíaca congestiva; Anuloplastia; Cães; CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA
• Link de acesso: https://repositorio.cruzeirodosul.edu.br/handle/123456789/694

The myxomatous mitral valve degeneration is the main cardiac disease in dogs which can lead to congestive heart failure (CHF), with low survival. This illness presents a chronic course, and it affects aging dogs mainly. The clinical treatment is palliative, aiming at only the improvement in the clinical signs caused by CHF. The only way to interrupt its progression is improving the valvar function, by surgical repair or valvar replacement. In this study the technique of mitral valvar annuloplasty by external plication for reduction of the mitral annulus was evaluated by both anatomical and clinical studies. For the anatomical study six corpses of dogs that had died due to causes unrelated to the cardiovascular system were included, and four dogs with myxomatous mitral valve degeneration were used for the clinical study. The surgical technique consists of a buttressed double row running suture in the left ventricular free wall, ventral and parallel to the atrioventricular groove. In the anatomical study, there was a significant reduction in the lateral and septo-parietal diameter of the mitral annulus, 12.35% and 23.45% respectively. In the clinical study, two dogs presented mitral regurgitation jets reduction, from severe to mild-to-moderate jets, evidenced by the echodopplercardiography. One of them improved clinically and the other died 48h after surgery due to acute renal failure, and the remained two dogs died during the procedure due to hemorrhage caused for the plication. In this way, the studied technique revealed efficient in mitral regurgitation reduction, however it seems to be more indicated in dogs with CHF degree II than in dogs with CHF degree III.