Prevalence and definition of secondary mitral valve regurgitation -- Anatomical changes associated with secondary mitral regurgitation: Difference between ischemic and idiopathic cardiomyopathy -- Clinical prognostic value of secondary mitral valve regurgitation -- Functional classification of the secondary mitral valve regurgitation -- Preoperative echocardiographic evaluation of secondary mitral valve regurgitation -- Three-dimensional echocardiographic imaging of secondary mitral valve regurgitation -- Dynamic stress evaluation of secondary mitral valve regurgitation -- Evaluation of secondary mitral valve regurgitation by cardiac magnetic resonance -- Timing and patients selection for surgical repair of secondary mitral valve regurgitation -- Intraoperative echocardiographic imaging during mitral valve repair -- Surgical approaches of secondary mitral regurgitation: Mitral valve restrictive annuloplasty: the ideal strategy -- The role of the "edge-to-edge" mitral valve repair -- Prosthetic ring choice: impact on clinical outcomes and repair results -- Papillary muscles relocation -- Basal chordal cutting -- The Coapsys Device -- The CorCap device -- Role of cardiac resynchronization therapy -- Percutaneous treatment in secondary mitral valve regurgitation -- 2D and 3D echocardiographic imaging during percutaneous mitral clip procedure -- Impact of tricuspid valve regurgitation in patients with secondary mitral valve regurgitation -- Tricuspid valve repair: when and how -- Predictors of recurrent mitral regurgitation after mitral valve repair surgery -- Follow-up after mitral valve repair.