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. 2022 Mar 2;38(9):2013–2023. doi: 10.1007/s10554-022-02578-z

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© The Author(s) 2022

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 1 — Left atrial endocardial tracking for strain assessment by feature tracking CMR, with an example of baseline and week-12 left atrial strain for a participant in MRP group. Cine 2- and 4-chamber images illustrating contoured left atrial borders at left ventricular end-diastole (upper) and left ventricular end-systole (lower). On the right, A LA strain curve at baseline and B LA strain curve at follow-up. Both curves are for the same patient and produced from tracking LA endocardium across the cardiac cycle using 4-chamber cine. LAS_cd was calculated as: LAS_r − LAS_bp (LAS_r LA strain at reservoir, LAS_cd LA strain at conduit, LAS_bp LA strain at booster-pump phase)