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. 2020 May 26;49(1):233–250. doi: 10.1007/s10439-020-02525-w

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© The Author(s) 2020

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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Right atrial fibre fields. Right atrial body fibre fields are displayed as streamlines coloured by UAC angle for the endocardial (top two rows) and epicardial (bottom two rows) surfaces. These are shown in lateral-septal view (first and third row) and septal-lateral view (second and fourth row). These are orientated such that the IVC-SVC universal atrial coordinate axis is aligned with the x-axis and the lateral-septal coordinate is aligned with the y-axis. UAC angles of 0 or $π$ correspond to the horizontal direction (aligned with the IVC-SVC coordinate axis), and UAC angles of $π / 2$ correspond to the vertical direction (aligned with the lateral-septal coordinate axis). Streamlines originating from the SVC, IVC, RAA and CS are omitted for visualisation purposes.