ANNULOPLASTY RINGS FOR REPAIR OF ABNORMAL MITRAL VALVES

摘要

A remodeling mitral annuloplasty ring with a reduced anterior-to-posteriordimension to restore coaptation between the mitral leaflets in mitral valveinsufficiency (IMVI). The ring has a generally oval shaped body with a majoraxis perpendicular to a mirror axis, both perpendicular to a blood flow axis.An anterior section lies between anteriolateral and posteriomedial trigones,while a posterior section defines the remaining ring body and is divided intoP1, P2, and P3 segments corresponding to the three scallops of the samenomenclature in the posterior leaflet of the mitral valve. The anterior-to-posterior dimension of the ring body is reduced from conventional rings; suchas by providing, in atrial plan view, a pulled-in P3 segment. Viewed anotherway, the convexity of the P3 segment is less pronounced than the convexity ofthe P1 segment. In addition, the ring body may have a downwardly deflectedportion in the posterior section, preferably within the P2 and P3 segments.The downwardly deflected portion may have an apex which is the lowestelevation of the ring body and may be offset with respect to the center of thedownwardly deflected portion toward the P1 segment. A sewing cuff may have anenlarged radial dimension of between 5-10cm, or only a portion of the sewingcuff may be enlarged.