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. 2021 Dec 7;8:775039. doi: 10.3389/fcvm.2021.775039

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Copyright © 2021 Richter, Zedler, Berliner, Douschan, Gall, Ghofrani, Kimmig, Kremer, Olsson, Brita da Rocha, Rosenkranz, Seeger, Yogeswaran, Rako and Tello.

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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Illustration of the assessment of RA strain. (A) First, the RV-focused apical four-chamber view was used with selection of the cardiac cycle and adjustment of the electrocardiogram (to R-wave). (B) Second, the RA endocardial border was traced as the region of interest, covering the RA lateral wall, roof, and septal wall. (C) Third, processing provided an overview wherever speckle tracking was feasible for the selected regions. (D) Fourth, the different phases were identified and the strain values determined. PACS, peak active contraction strain; PLS, peak longitudinal strain; PS, passive strain; RA, right atrial; RV, right ventricular.