Prognostic value of preprocedural 6-min walk test in patients undergoing transcatheter mitral valve repair—insights from the German transcatheter mitral valve interventions registry

Aims The 6-min walk test (6 MWT) has been established as an important tool for functional assessment in heart failure patients. However, its prognostic impact on the outcome in subjects with mitral regurgitation undergoing transcatheter mitral valve repair is unknown.