Research Communications of the 24th ECVIM-CA Congress

No conflicts of interest reported. Mitral regurgitation (MR) secondary to degenerative mitral valve disease (DMVD) is the most common heart disease in dogs. In dogs with MR, mitral valve prolapse caused by degeneration of the mitral valve leaflet, chordae tendinae extension and/or rupture and mitral annulus dilation are observed. However, limited data are available on morphological changes in dogs with MR. Currently, there are no studies confirming the anomaly of the mitral complex via direct observation in living dogs with mitral regurgitation. At our institution over the last ten years, approximately 300 dogs have undergone mitral valve repair. During surgery, the anomaly of mitral complex can be observed macroscopically (directly visualized). To our knowledge, this is the first study evaluating the anomaly of the mitral valve leaflet and chordae tendineae in dogs undergoing mitral valve repair.