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. 2023 Mar 31;10:1111538. doi: 10.3389/fcvm.2023.1111538

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© 2023 Galli, Galand, Le Rolle, Taconne, Wazzan, Hernandez, Leclercq and Donal.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Example of the semi-quantitative analysis of the strain curve dynamics through the calculation of strain integrals for the basolateral segment in 4-chamber view. Upper panel: the red-shaded area represents the integral to strain peak (I_l,peak). Middle panel: the red-shaded area represents the integral to aortic valve closure (I_l,AVC). Lower panel: the red-shaded area represents E_l, the difference between I_l,peak and I_l,AVC, corresponding to the waste energy due to the delayed lateral wall contraction. AL, apico-lateral segment; AS, apico-septal segment; BL, basal-lateral segment; BS, basal-septal segment; ML, mid-lateral segment; MS, mid-septal segment.