Keywords: American Council of Cardiology; American Heart Association; Mitral Valve Academic Research Consortium; annuloplasty, mitral valve replacement; aortic regurgitation stages; atrial fibrillation; clinical outcomes; edge-to-edge repair; effective orifice area; heart failure; left atrial volume; left ventricular diameter; mitral annulus; mitral leaflets; primary mitral regurgitation; regurgitant fraction; regurgitant volume; secondary mitral regurgitation grades; transcatheter mitral valve repair; valvular heart disease guidelines; vena contracta.