Fig. 7.

a Comparisons of the fitting results and tissue-level mechanical testing data of the MV components: equi-biaxial loading data and fitted stress–strain curves in both the circumferential and radial directions for the MV anterior leaflet (r² = 0.992) and posterior leaflet (r² = 0.986), and uniaxial loading data and fitted stress–strain curves for the basal chordae (r² = 0.975) and the marginal chordae (r² = 0.987); b illustration of the fiber splay dispersion effect on the stress–strain curves, showing the capability of the adopted simplified structural constitutive model for describing wide-spectrum mechanical behaviors of the MV leaflet tissues by adjusting parameter σ