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. 2016 Sep 8;16(1):177. doi: 10.1186/s12872-016-0355-7

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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. 3 — Potential causes of suboptimal FFR after percutaneous coronary interventions. Panel a ‘geographical miss’ (diseased reference segment). Panel b stent mal-apposition. Panel c stent under-expansion. Panel d intrastent plaque-protrusion/thrombus. Panel e edge dissection. MLA - minimal lumen area, REF - proximal reference segment