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(a) Tissue specimen alignment with respect to the anatomical directions of the heart. (b) Close-up of triaxial mechanical testing device, featuring (i) minimally restrictive attachment systems, containing (ii) force-torque cells measuring load in real time, within (iii) heated fluid bath. (c) Myocardium specimen mounted with anatomical directions aligned to device axes. Abbreviations: left ventricle (LV).
