Objective This paper proposes a new finite element analysis(FEA)model to mimic the actual valve shape and investigate the stress distribution and closure performance of leaflet. Methods In the suture model,two-dimensional design of leaflet is transferred to 3D model by FEA method which mimics the suture process. The contrast model,which is created by an ideal 3D geometry structure of valve,is utilized to compare the stress distribution differences between suture and contrast models. Meanwhile,the actual close state is investigated to validate the effectiveness of two models. Results The closing state and the angle of leaflet are reliable in the suture model with the wings of the valve leaflets being the maximum stress positions. Conclusions The FEA suture model can provide more accurate results for heart valve leaflet performance analysis than the contrast model,and offer the guide for the design and the optimization of the valve leaflet shape.
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