Kahrilas PJ, Bredenoord AJ, Fox M, Gyawali CP, Roman S, Smout AJ, Pandolfino JE. International high resolution manometry working group. The chicago classification of esophageal motility disorders v.30. Neurogastroenterol Motil. 2015;27:160.

Article  CAS  PubMed  Google Scholar 

Kahrilas PJ, Boeckxstaens G. The spectrum of achalasia: lessons from studies of pathophysiology and high-resolution manometry. Gastroenterology. 2013;145(5):954–65. https://doi.org/10.1053/j.gastro.2013.08.038.

Article  PubMed  Google Scholar 

Shahsavari D, Malik Z, Parkman HP. Management of the patient with esophagogastric junction outflow obstruction. Curr Opin Gastroenterol. 2021;37(4):397–407.

Article  PubMed  Google Scholar 

Beveridge C, Lynch K. Diagnosis and management of esophagogastric junction outflow obstruction. Gastroenterol Hepatol (N Y). 2020;16(3):131–8.

PubMed  Google Scholar 

Lynch KL, Yang YX, Metz DC, Falk GW. Clinical presentation and disease course of patients with esophagogastric junction outflow obstruction. Dis Esophagus. 2017;30(6):1–6.

Article  CAS  PubMed  Google Scholar 

Garbarino S, von Isenburg M, Fisher DA, Leiman DA. Management of functional esophagogastric junction outflow obstruction: a systematic review. J Clin Gastroenterol. 2020;54(1):35–42.

Article  PubMed  Google Scholar 

Csucska M, Masuda T, Bremner RM, Mittal SK. Esophagogastric junction outflow obstruction: are we missing anything? J Clin Gastroenterol. 2021;55(2):121–6.

Article  PubMed  Google Scholar 

WHO Expert Consultation. Appropriate body-mass index for Asian populations and its implications for policy and intervention strategies. Lancet. 2004;363(9403):157–63.

Article  Google Scholar 

Hill LD, Kozarek RA, Kraemer SJ, Aye RW, Mercer CD, Low DE, Pope CE 2nd. The gastroesophageal flap valve: in vitro and in vivo observations. Gastrointest Endosc. 1996;44(5):541–7.

Article  CAS  PubMed  Google Scholar 

Yadlapati R, Kahrilas PJ, Fox MR, Bredenoord AJ, Prakash Gyawali C, Roman S, Babaei A, Mittal RK, Rommel N, Savarino E, Sifrim D, Smout A, Vaezi MF, Zerbib F, Akiyama J, Bhatia S, Bor S, Carlson DA, Chen JW, Cisternas D, Cock C, Coss-Adame E, de Bortoli N, Defilippi C, Fass R, Ghoshal UC, Gonlachanvit S, Hani A, Hebbard GS, Wook Jung K, Katz P, Katzka DA, Khan A, Kohn GP, Lazarescu A, Lengliner J, Mittal SK, Omari T, Park MI, Penagini R, Pohl D, Richter JE, Serra J, Sweis R, Tack J, Tatum RP, Tutuian R, Vela MF, Wong RK, Wu JC, Xiao Y, Pandolfino JE. Esophageal motility disorders on high-resolution manometry: Chicago classification version 4.0©. Neurogastroenterol Motil. 2021;33:14058.

Article  Google Scholar 

Sallette M, Lenz J, Mion F, Roman S. From Chicago classification v3.0 to v4.0: diagnostic changes and clinical implications. Neurogastroenterol Motil. 2023;35(1):e14467.

Article  PubMed  Google Scholar 

Mittal RK, Hong SJ, Bhargava V. Longitudinal muscle dysfunction in achalasia esophagus and its relevance. J Neurogastroenterol Motil. 2013;19(2):126–36.

Article  PubMed  PubMed Central  Google Scholar 

Song BG, Min YW, Lee H, Min BH, Lee JH, Rhee PL, Kim JJ. Clinicomanometric factors associated with clinically relevant esophagogastric junction outflow obstruction from the Sandhill high-resolution manometry system. Neurogastroenterol Motil. 2018. https://doi.org/10.1111/nmo.13221.

Article  PubMed  Google Scholar 

Pérez-Fernández MT, Santander C, Marinero A, Burgos-Santamaría D, Chavarría-Herbozo C. Characterization and follow-up of esophagogastric junction outflow obstruction detected by high resolution manometry. Neurogastroenterol Motil. 2016;28(1):116–26.

Article  PubMed  Google Scholar 

Ong AML, Namasivayam V, Wang YT. Evaluation of symptomatic esophagogastric junction outflow obstruction. J Gastroenterol Hepatol. 2018;33(10):1745–50.

Article  PubMed  Google Scholar 

Aliperti G, Clouse RE. Incomplete lower esophageal sphincter relaxation in subjects with peristalsis: prevalence and clinical outcome. Am J Gastroenterol. 1991;86(5):609–14.

CAS  PubMed  Google Scholar 

Scherer JR, Kwiatek MA, Soper NJ, Pandolfino JE, Kahrilas PJ. Functional esophagogastric junction obstruction with intact peristalsis: a heterogeneous syndrome sometimes akin to achalasia. J Gastrointest Surg. 2009;13(12):2219–25.

Article  PubMed  PubMed Central  Google Scholar 

Porter RF, Gyawali CP. Botulinum toxin injection in dysphagia syndromes with preserved esophageal peristalsis and incomplete lower esophageal sphincter relaxation. Neurogastroenterol Motil. 2011;23(2):139.

Article  CAS  PubMed  Google Scholar 

Marjoux S, Brochard C, Roman S, Gincul R, Pagenault M, Ponchon T, Ropert A, Mion F. Botulinum toxin injection for hypercontractile or spastic esophageal motility disorders: may high-resolution manometry help to select cases? Dis Esophagus. 2015;28(8):735–41.

Article  CAS  PubMed  Google Scholar 

van Hoeij FB, Smout AJ, Bredenoord AJ. Characterization of idiopathic esophagogastric junction outflow obstruction. Neurogastroenterol Motil. 2015;27(9):1310–6.

Article  PubMed  Google Scholar 

Clayton SB, Patel R, Richter JE. Functional and anatomic esophagogastic junction outflow obstruction: manometry, timed barium esophagram findings, and treatment outcomes. Clin Gastroenterol Hepatol. 2016;14(6):907–11.

Article  PubMed  Google Scholar 

Su H, Ge H, Liu H, Jiang G, Shi S, Xu G, Zhang N, Wu J. High-resolution manometry in the upright position could improve the manometric evaluation of morbidly obese patients with esophagogastric junction outflow obstruction. Neurogastroenterol Motil. 2020;32(11):e13924.

Article  PubMed  Google Scholar 

Chang P, Friedenberg F. Obesity and GERD. Gastroenterol Clin North Am. 2014;43(1):161–73.

Article  PubMed  Google Scholar 

Gyawali CP, Kahrilas PJ, Savarino E, Zerbib F, Mion F, Smout AJPM, Vaezi M, Sifrim D, Fox MR, Vela MF, Tutuian R, Tack J, Bredenoord AJ, Pandolfino J, Roman S. Modern diagnosis of GERD: the Lyon Consensus. Gut. 2018;67(7):1351–62.

Article  PubMed  Google Scholar 

Zaninotto G, Annese V, Costantini M, Del Genio A, Costantino M, Epifani M, Gatto G, D’onofrio V, Benini L, Contini S, Molena D, Battaglia G, Tardio B, Andriulli A, Ancona E. Randomized controlled trial of botulinum toxin versus laparoscopic heller myotomy for esophageal achalasia. Ann Surg. 2004;239(3):364–70.

Article  PubMed  PubMed Central  Google Scholar 

Nickel F, Müller PC, de la Garza JR, Tapking C, Benner L, Fischer L, Steinemann DC, Rupp C, Linke GR, Müller-Stich BP. Heller myotomy versus endoscopic balloon dilatation for achalasia: a single center experience. Medicine (Baltimore). 2019;98(44):e17714.

Article  PubMed  Google Scholar 

Gutschow CA, Töx U, Leers J, Schäfer H, Prenzel KL, Hölscher AH. Botox, dilation, or myotomy? Clinical outcome of interventional and surgical therapies for achalasia. Langenbecks Arch Surg. 2010;395(8):1093–9.

Article  PubMed  Google Scholar 

Katzka DA, Castell DO. Review article: an analysis of the efficacy, perforation rates and methods used in pneumatic dilation for achalasia. Aliment Pharmacol Ther. 2011;34(8):832–9.

Article  CAS  PubMed  Google Scholar