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. 2015 Nov 4;15:145. doi: 10.1186/s12872-015-0135-9

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© Shao et al. 2015

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided 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 Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 1 — Measurement of global longitudinal left atrial strain from an apical four-chamber view. The white dashed curve represents the global longitudinal atrial strain along the cardiac cycle. GLSs = global left atrial peak negative strain during atrial systole. GLSr = global left atrial peak positive strain during ventricle systole. AVC = aortic valve closure