Changes in Mitral Valve Annular Geometry After Repair: Saddle-Shaped Versus Flat Annuloplasty Rings
نویسندگان
چکیده
منابع مشابه
Saddle-shaped mitral valve annuloplasty rings experience lower forces compared with flat rings.
BACKGROUND New insight into the 3D dynamic behavior of the mitral valve has prompted a reevaluation of annuloplasty ring designs. Force balance analysis indicates correlation between annulus forces and stresses in leaflets and chords. Improving this stress distribution can intuitively enhance the durability of mitral valve repair. We tested the hypothesis that saddle-shaped annuloplasty rings h...
متن کاملThe Viable Mitral Annular Dynamics and Left Ventricular Function after Mitral Valve Repair by Biological Rings
OBJECTIVE Considering the importance of annular dynamics in the valvular and ventricular function, we sought to evaluate the effects of treated pericardial annuloplasty rings on mitral annular dynamics and left-ventricular (LV) function after mitral valve repair. The results were compared with the mitral annular dynamics and LV function in patients with rigid and flexible rings and also in thos...
متن کاملThree-dimensional echocardiographic assessment of changes in mitral valve geometry after valve repair.
BACKGROUND Application of annuloplasty rings during mitral valve (MV) repair has been shown to significantly change the mitral annular geometry. Until recently, a comprehensive two-dimensional echocardiographic evaluation of annular geometric changes was difficult owing to its nonplanar orientation. In this study, an analysis of the three-dimensional intraoperative transesophageal echocardiogra...
متن کاملThe influence of saddle-shaped annuloplasty on leaflet curvature in patients with ischaemic mitral regurgitation.
OBJECTIVES Reports indicate that repair procedures for ischaemic mitral regurgitation (IMR) are less durable than previously thought. Repair failure has been shown to be stress related. Leaflet curvature is the major determinant of valve stress. Theoretical and animal experiments have shown that saddle-shaped annuloplasty optimizes leaflet curvature when compared with standard flat ring annulop...
متن کاملRigid, complete annuloplasty rings increase anterior mitral leaflet strains in the normal beating ovine heart.
BACKGROUND Annuloplasty ring or band implantation during surgical mitral valve repair perturbs mitral annular dimensions, dynamics, and shape, which have been associated with changes in anterior mitral leaflet (AML) strain patterns and suboptimal long-term repair durability. We hypothesized that rigid rings with nonphysiological three-dimensional shapes, but not saddle-shaped rigid rings or fle...
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ژورنال
عنوان ژورنال: The Annals of Thoracic Surgery
سال: 2010
ISSN: 0003-4975
DOI: 10.1016/j.athoracsur.2010.03.119