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. 2016 Aug 15;4:51. doi: 10.1186/s40560-016-0176-x

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© The Author(s). 2016

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. 15 — Distended IVC. This is the M-mode tracing of IVC in a patient with massive PE. The IVC is plethoric of a diameter >2.1 cm with only minimal respiratory variation (IVC = inferior vena cava)