MR occurs either due to disease involving the mitral valve apparatus, known as primary MR (or “organic” MR), or due to dilation of the mitral valve annulus associated with impaired left ...

The causes of mitral regurgitation are diverse since the mitral valve apparatus is complex. Mitral regurgitation can occur when the mitral valve apparatus is itself diseased (primary mitral ...

but this seems dependent on producing a competent mitral apparatus. Abundant literature on repair is available, but no convincing evidence exists to prove that this is superior to replacement.