[Further Surgery for Mitral Stenosis 12-years after Mitral Valve Repair;Report of a Case].

A rare case of mitral stenosis after mitral valve repair for non-rheumatic mitral regurgitation is presented. An 81-year-old woman who had undergone mitral valve repair using an annuloplasty ring 12 years earlier, was referred to our hospital because of dyspnea during exertion. As echocardiography revealed severe mitral stenosis, and redo surgery was carried out. During the surgery, fibrous tissue covered the annuloplasty ring and extended onto both leaflets of the mitral valve, which narrowed its orifice, by rendering the leaflets stiff and immobile. It was not possible to remove the fibrous tissue covering the mitral valve without damaging the leaflets. Hence, the annuloplasty ring and both leaflets were excised. The mitral valve was replaced with a 27 mm Magna Mitral Ease, and subsequently, postoperative course was uneventful.