Saddle-shaped mitral valve annuloplasty rings improve leaflet coaptation geometry
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 کاملLifting posterior mitral annuloplasty for enhancing leaflet coaptation in mitral valve repair: midterm outcomes.
BACKGROUND We evaluated the midterm outcomes of lifting posterior mitral annuloplasty for enhancing leaflet coaptation in mitral valve repair. METHODS Between October 2007 and December 2012, 341 consecutive patients with significant mitral regurgitation underwent lifting posterior mitral annuloplasty using a specially designed fabric annuloplasty strip that lifts the middle portion of the pos...
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...
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OBJECTIVES This study sought to evaluate a ventilation maneuver to facilitate percutaneous edge-to-edge mitral valve repair (PMVR) and its effects on heart geometry. BACKGROUND In patients with challenging anatomy, the application of PMVR is limited, potentially resulting in insufficient reduction of mitral regurgitation (MR) or clip detachment. Under general anesthesia, however, ventilation ...
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 (#...
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ژورنال
عنوان ژورنال: The Journal of Thoracic and Cardiovascular Surgery
سال: 2011
ISSN: 0022-5223
DOI: 10.1016/j.jtcvs.2011.01.022