Abstract
Background
Hypersensitive esophagus (HE) is defined by endoscopy-negative heartburn with a normal acid exposure time but positive symptom association probability (SAP) and/or symptom index (SI) on impedance–pH monitoring, and proton pump inhibitor (PPI) responsiveness. Functional heartburn (FH) is distinguished by negative SAP/SI and PPI refractoriness. The clinical value of SAP and SI has been questioned. We aimed to investigate whether impairment of chemical clearance and of mucosal integrity, expressed by the postreflux swallow-induced peristaltic wave (PSPW) index and the mean nocturnal baseline impedance (MNBI), characterize HE independently of SAP and SI.
Methods
Impedance–pH tracings from PPI-responsive endoscopy-negative patients, 125 with nonerosive reflux disease and 108 with HE, distinguished by an abnormal and a normal acid exposure time, and from 70 patients with FH were retrospectively selected and blindly reviewed.
Results
The mean PSPW index and MNBI were significantly lower in nonerosive reflux disease (30 %, 1378 Ω) than in HE (51 %; 2274 Ω) and in both of them as compared with FH (76 %; 3445 Ω) (P = 0.0001). Both the PSPW index (adjusted odds ratio 0.863, P = 0.001) and the MNBI (adjusted odds ratio 0.998, P = 0.001) were independent predictors of HE; with their combined assessment, the area under the curve on receiver operating characteristic analysis was 0.957. SAP and/or SI was positive in 67 of the 108 HE patients (62 %), whereas the PSPW index and/or MNBI was abnormal in 99 of the 108 HE patients (92 %; P < 0.0001).
Conclusions
HE is characterized by impairment of chemical clearance and mucosal integrity, which explains the increased reflux perception. When SAP and SI afford uncertain results, the PSPW index and MNBI should be analyzed.
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References
Galmiche JP, Clouse RE, Balint A, et al. Functional esophageal disorders. Gastroenterology. 2006;130:1459–65.
Katz P, Gerson L, Vela M. Guidelines for the diagnosis and management of gastroesophageal reflux disease. Am J Gastroenterol. 2013;108:308–28.
Zerbib F, Sifrim D, Tutuian R, et al. Modern medical and surgical management of difficult-to-treat GORD. United Eur Gastroenterol J. 2013;1:21–31.
Savarino E, Zentilin P, Savarino V. NERD: an umbrella term including heterogeneous subpopulations. Nat Rev Gastroenterol Hepatol. 2013;10:371–80.
Slaughter JC, Goutte M, Rymer JA, et al. Caution about overinterpretation of symptom indexes in reflux monitoring for refractory gastroesophageal reflux disease. Clin Gastroenterol Hepatol. 2011;9:868–74.
Vaezi MF. Ambulatory monitoring for gastroesophageal reflux disease: where do we stand? Clin Gastroenterol Hepatol. 2015;13:892–4.
Conchillo J, Smout A. Review article: intra-oesophageal impedance monitoring for the assessment of bolus transit and gastro-oesophageal reflux. Aliment Pharmacol Ther. 2008;29:3–14.
Woodley FW, Fernandez F, Mousa H. Diurnal variation in the chemical clearance of acid gastroesophageal reflux in infants. Clin Gastroenterol Hepatol. 2007;5:37–43.
Frazzoni M, Manta R, Mirante VG, et al. Esophageal chemical clearance is impaired in gastro-oesophageal reflux disease—a 24 h impedance-pH monitoring assessment. Neurogastroenterol Motil. 2013;25:399–406.
Kessing BF, Bredenoord AJ, Weijenborg PW, et al. Esophageal acid exposure decreases intraluminal baseline impedance. Am J Gastroenterol. 2011;106:2093–7.
Farrè R, Blondeau K, Clement D, et al. Evaluation of oesophageal mucosa integrity by the intraluminal impedance technique. Gut. 2011;60:885–92.
Woodland P, Al-Zinaty M, Yazaki E, et al. In vivo evaluation of acid-induced changes in oesophageal mucosa integrity and sensitivity in non-erosive reflux disease. Gut. 2013;62:1256–61.
Farrè R. Pathophysiology of gastro-esophageal reflux disease: a role for mucosa integrity? Neurogastroenterol Motil. 2013;25:783–99.
Martinucci I, De Bortoli N, Savarino E, et al. Esophageal baseline impedance levels in patients with pathophysiological characteristics of functional heartburn. Neurogastroenterol Motil. 2014;26:546–55.
De Bortoli N, Martinucci I, Savarino E, et al. Association between baseline impedance values and response proton pump inhibitors in patients with heartburn. Clin Gastroenterol Hepatol. 2015;13:1082–8.
Frazzoni M, Savarino E, De Bortoli N, et al. Analyses of the post-reflux swallow-induced peristaltic wave index and nocturnal baseline impedance parameters increase the diagnostic yield of patients with reflux disease. Clin Gastroenterol Hepatol. 2016;14:40–6.
Savarino E, Pohl D, Zentilin P, et al. Functional heartburn has more in common with functional dyspepsia than with non-erosive reflux disease. Gut. 2009;58:1185–91.
Frazzoni M, Conigliaro R, Manta R, et al. Reflux parameters as modified by EsophyX or laparoscopic fundoplication in refractory GERD. Aliment Pharmacol Ther. 2011;34:67–75.
Savarino E, Tutuian R, Zentilin P, et al. Characteristics of reflux episodes and symptom association in patients with erosive esophagitis and nonerosive reflux disease: study using combined impedance-pH off therapy. Am J Gastroenterol. 2010;105:1053–61.
Penagini R, Sweis R, Mauro A, et al. Inconsistency in the diagnosis of functional heartburn: usefulness of prolonged wireless pH monitoring in patients with proton pump inhibitor refractory gastroesophageal reflux disease. J Neurogastroenterol Motil. 2015;21:265–72.
Zerbib F, Roman S, Alpert A, et al. Esophageal pH-impedance monitoring and symptom analysis in GERD: a study in patients off and on therapy. Am J Gastroenterol. 2006;101:1956–63.
Savarino E, Zentilin P, Mastracci L, et al. Microscopic esophagitis distinguishes patients with non-erosive reflux disease from those with functional heartburn. J Gastroenterol. 2013;48:473–82.
Bredenoord AJ, Smout AJPM. Association between reflux and symptoms during ambulatory reflux monitoring: pros and cons of existing methods. Neurogastroenterol Motil. 2013;25:633–7.
Cheng F-K, Albert D, Maydonovitch C, et al. Categorization of patients with reflux symptoms referred for pH and impedance testing while off therapy. Clin Gastroenterol Hepatol. 2015;13:867–73.
Patel A, Sayuk GS, Gyawali P. Parameters on esophageal pH-impedance monitoring that predict outcomes of patients with gastroesophageal reflux disease. Clin Gastroenterol Hepatol. 2015;13:884–91.
Patel A, Sayuk G, Kushnir V, et al. GERD phenotypes from pH-impedance monitoring predict symptomatic outcomes on prospective evaluation. Neurogastroenterol Motil. 2016;28:513–21.
Pritchett JM, Aslam M, Slaughter JC, et al. Efficacy of esophageal impedance/pH monitoring in patients with refractory gastroesophageal reflux disease, on and off therapy. Clin Gastroenterol Hepatol. 2009;7:743–8.
Frazzoni M, Conigliaro R, Melotti G. Reflux parameters as modified by laparoscopic fundoplication in 40 patients with heartburn/regurgitation persisting despite PPI therapy. A study using impedance-pH monitoring. Dig Dis Sci. 2011;56:1099–106.
Frazzoni M, Conigliaro R, Mirante VG, et al. The added value of quantitative analysis of on-therapy impedance-pH parameters in distinguishing refractory non-erosive reflux disease from functional heartburn. Neurogastroenterol Motil. 2012;24:141–7.
Frazzoni M, Piccoli M, Conigliaro R, et al. Refractory gastroesophageal reflux disease as diagnosed by impedance-pH monitoring can be cured by laparoscopic fundoplication. Surg Endosc. 2013;27:2940–6.
De Bortoli N, Martinucci I, Savarino E, et al. Manually calculated oesophageal bolus clearance time increases in parallel with reflux severity at impedance-pH monitoring. Dig Liver Dis. 2015;47:1027–32.
Frazzoni M, Conigliaro R, Melotti G. Weakly acidic refluxes have a major role in the pathogenesis of proton pump inhibitor-resistant reflux oesophagitis. Aliment Pharmacol Ther. 2011;33:601–6.
Ribolsi M, Savarino E, De Bortoli N, et al. Reflux pattern and role of impedance-pH variables in predicting PPI response in patients with suspected GERD-related chronic cough. Aliment Pharmacol Ther. 2014;40:966–73.
Gyawali CP. Redeeming clinical value of esophageal pH impedance monitoring. Clin Gastroenterol Hepatol. 2016;14:47–9.
Numans M, Lau J, de Wit N, et al. Short-term treatment with proton-pump inhibitors as a test for gastroesophageal reflux disease—a meta-analysis of diagnostic test characteristics. Ann Intern Med. 2004;140:518–27.
Frazzoni M, Bertani H, Manta R, et al. Impairment of chemical clearance is relevant to the pathogenesis of refractory reflux oesophagitis. Dig Liver Dis. 2014;46:596–612.
Frazzoni M, Bertani H, Conigliaro R, et al. Neoplastic progression in short-segment Barrett’s oesophagus is associated with impairment of chemical clearance, but not inadequate acid suppression by proton pump inhibitor therapy. Aliment Pharmacol Ther. 2014;40:835–42.
Zerbib F, Roman S, Des Varannes SB, et al. Normal values of pharyngeal and esophageal 24 h pH impedance in individuals on and off therapy and interobserver reproducibility. Clin Gastroenterol Hepatol. 2013;11:366–72.
Broeders JA, Draaisma WA, Bredenoord AJ, et al. Oesophageal acid hypersensitivity is not a contraindication to Nissen fundoplication. Br J Surg. 2009;96:1023–30.
Desjardin M, Luc G, Collet D, et al. 24 h pH-impedance monitoring on therapy to select patients with refractory reflux symptoms for antireflux surgery. A single center retrospective study. Neurogastroenterol Motil. 2016;28:146–52.
Roman S, Bruley Des Varannes S, Pouderoux P, et al. Ambulatory 24 h oesophageal impedance–pH recordings: reliability of automatic analysis for gastro-oesophageal reflux assessment. Neurogastroenterol Motil. 2006;18:978–86.
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The study was conducted without any financial support. The authors have no conflict of interest to declare.
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Selected in abstract form for a lecture in the Distinguished Abstract Plenary Session during Digestive Disease Week, May 24, 2016, held in San Diego, CA, USA.
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Frazzoni, M., de Bortoli, N., Frazzoni, L. et al. Impairment of chemical clearance and mucosal integrity distinguishes hypersensitive esophagus from functional heartburn. J Gastroenterol 52, 444–451 (2017). https://doi.org/10.1007/s00535-016-1226-9
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DOI: https://doi.org/10.1007/s00535-016-1226-9