Relationship between local tissue viability (i.e., pixel intensity measured by DE-MR imaging, normalized by the maximal pixel intensity) and local passive stiffness, as well as local active contractility. For low pixel intensities, i.e., healthy myocardium, the local stiffness, and contractility are equal to their normal values. Conversely, for high pixel intensities, i.e., damaged myocardium, the local stiffness is much higher than normal, and the local contractility is null. We assumed linearly varying material properties across the BZ. The parameters and must be personalized for each patient.