Finite element modeling of the human mitral valve: Implications of morphologies and dynamics of the annulus and the chordae tendineae

摘要: Objectives: To investigate the influences caused by special morphologies and dynamics of substructures mitral valve explicit finite element program LS-DYNA. Methods: A new model for apparatus characterized layered structure leaflets tissue, saddle shape contraction annulus, an approximately accurate morphology chordae tendineae was developed. The coaptation length, stress strain present were compared with those two auxiliary models, one planar annulus other fixed annulus. tensile function force distribution analyzed in models without tendineae. Results: stretch ratios computed most closely to experimental data. instantly turned over atrial side larger load observed Besides, highly correlated average diameter (r = 0.965). Conclusion: benefits could help decrease loads on prevent concentrating excessively. Chordae bear partial leaflets, turn atrium close successfully.