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. 2018 Dec 14;13(1):32–39. doi: 10.5009/gnl18233

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Copyright © 2019 by The Korean Society of Gastroenterology, the Korean Society of Gastrointestinal Endoscopy, the Korean Society of Neurogastroenterology and Motility, Korean College of Helicobacter and Upper Gastrointestinal Research, Korean Association the Study of Intestinal Diseases, the Korean Association for the Study of the Liver, Korean Pancreatobiliary Association, and Korean Society of Gastrointestinal Cancer.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 3 — Evaluation of the esophagogastric junction (EGJ) using distal esophageal spasm (EndoFLIP) and endoscopy before and after peroral endoscopic myotomy (POEM). (A) Examples of EndoFLIP displaying the EGJ with a 40-mL volume inflation. Distensibility index (DI) before POEM is 1.0 mm²/mm Hg (left) and DI after POEM is 9.7 mm²/mm Hg (right). (B) Examples of endoscopy displayed the EGJ. The EGJ was tight before POEM (left) and The EGJ showing improvement in the opening diameter after POEM (right).