Mitral valve repair for isolated double-orifice mitral valve with torn chordae.

Double-orifice mitral valve is an unusual condition of importance to surgeons, and usually associated with other cardiac anomalies. This article reports a case of isolated double-outlet mitral valve with torn chordae in which we successfully performed mitral valvuloplasty by placement of artificial chordae. The mitral valve was divided into anterolateral and posteromedial orifices by vertical bridging tissue. Two torn chordae at the posteromedial scallop surrounding the posteromedial mitral orifice were replaced with artificial chordae of two pairs of expanded polytetrafluoroethylene sutures. Because replacement of torn chordae with artificial chordae was not complicated and seemed to preserve very fine relationships among leaflet tissues, bridging tissue, chordae, and papillary muscles, we suggest this method may be used to reconstruct various kinds of mitral lesions causing mitral regurgitation.