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. 2018 Jan 8;8:81. doi: 10.1038/s41598-017-18354-2

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© The Author(s) 2017

Open Access This 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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/.

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Mitral annulus dynamics obtained by feature tracking. In (A,B), the MA velocity and displacement were plotted as a function of annular region and cardiac cycle for all radially rotational slices and cardiac phases. In (C,D), the spatially averaged velocity and displacement curves were plotted along the cardiac cycle for 18, 9, 6, and 3 slices, respectively. For the 3-slice version, the clinical routine 2-, 3- and 4-chamber views were chosen. Data were obtained from a 39-year-old male normal control. Sm: peak systolic velocity; Am: peak late diastolic velocity; Em: peak early diastolic velocity; MAPSE: mitral annular plane systolic excursion.