FIGURE 5.

Longitudinal strain (LS) and circumferential strain (CS) at the endocardium and epicardium at various (A,C) wall thickness ratios and (B,D) dilation ratios, where the mid-wall ED-to-ES strains were kept constant at −0.12. In (A) and (B), myocardium was appropriately modelled as incompressible, and LS and CS resulted in non-zero radial strains. In (C) and (D), radial strains were assumed to be zero, to show that without radial displacements, there would be minimal epi-to-endo spatial strain variability. (E,F) the radial displacements of the epicardial and endocardial surfaces from the mid-wall when the heart has (E) wall thickening or (F) dilation.