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We report the case of a patient with severe mitral regurgitation who was diagnosed with double-orifice mitral valve by preoperative transthoracic and transoesophageal echocardiography. During surgery, it was revealed that the mitral valve was divided into 2 orifices, anterolateral and posteromedial, by a fibrous bridging tissue that was supported by the chordae tendineae originating from an accessory middle papillary muscle. The posterior scallop of the anterolateral orifice was prolapsed due to chordal elongation. Six interrupted sutures were made between the anterior leaflet and the posterior leaflet at the prolapsed site. Additional interrupted sutures were made at the sites of 2 clefts, and a ring annuloplasty was added. Residual mitral regurgitation was trivial, and the mean postoperative pressure gradient through each orifice was approximately 6 mmHg. To the best of our knowledge, this is the first case report of an edge-to-edge mitral repair for mitral regurgitation associated with a double-orifice mitral valve.

Edge-to-edge repair for mitral regurgitation associated with isolated double-orifice mitral valve