Saddle-Shaped Mitral Valve Annuloplasty Rings Experience Lower Forces Compared With Flat 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 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 کاملHow do annuloplasty rings affect mitral leaflet dynamic motion?
OBJECTIVES To define the effects of annuloplasty rings (ARs) on the dynamic motion of anterior mitral leaflet (AML) and posterior mitral leaflet (PML). METHODS Fifty-eight adult, Dorsett-hybrid, male sheep (49 + or - 5 kg) had radiopaque markers inserted: eight around the mitral annulus, four along the central meridian (from edge to annulus) of the AML (#A(1)-#A(4)) and one on the PML edge (#...
متن کاملLA R arge Annuloplasty Rings Facilitate Mitral Valve epair in Barlow ’ s Disease avid
p o r a c Background. Excess leaflet tissue in Barlow’s disease redisposes patients to left ventricular outflow tract bstruction and residual mitral regurgitation after miral valve repair as a result of systolic anterior motion f the anterior mitral leaflet. In addition to convenional repair techniques such as sliding plasty and eaflet shortening, our approach in Barlow’s disease as included th...
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: Circulation
سال: 2008
ISSN: 0009-7322,1524-4539
DOI: 10.1161/circulationaha.107.746776