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Walter Wai-Yip Chan, M.D.

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Washington University in St. Louis, St. Louis, MOBS05/2000Biomedical Engineering
Washington University in St. Louis, St. Louis, MOBS05/2000System Science and Engineering
Washington University School of Medicine, St. Louis, MOMD05/2004
Barnes-Jewish Hospital/Washington University School of Medicine, St. Louis, MO06/2007Internal Medicine Residency
Harvard School of Public Health, Boston, MAMPH06/2010Clinical Effectiveness
Brigham and Women's Hospital/Harvard Medical School, Boston, MA06/2010Gastroenterology Fellowship

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Bibliographic
Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Faculty can login to make corrections and additions.
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PMC Citations indicate the number of times the publication was cited by articles in PubMed Central, and the Altmetric score represents citations in news articles and social media. (Note that publications are often cited in additional ways that are not shown here.) Fields are based on how the National Library of Medicine (NLM) classifies the publication's journal and might not represent the specific topic of the publication. Translation tags are based on the publication type and the MeSH terms NLM assigns to the publication. Some publications (especially newer ones and publications not in PubMed) might not yet be assigned Field or Translation tags.) Click a Field or Translation tag to filter the publications.
  1. Borges LF, Salgado S, Hathorn KE, Feldman N, Carroll TL, Chan WW. Failed swallows on high-resolution manometry independently correlates with severity of LPR symptoms. J Voice. 2020.
  2. Li M, Chan WW, Zucker SD. Association Between Atazanavir-Induced Hyperbilirubinemia and Cardiovascular Disease in Patients Infected with HIV. J Am Heart Assoc. 2020 Sep 15; e016310. PMID: 32930032.
    Citations:    
  3. Lazarescu A, Chan WW, Gyawali CP, Lee YY, Xiao Y, Wu P. Updates on diagnostic modalities for esophageal dysphagia. Ann N Y Acad Sci. 2020 Sep 01. PMID: 32875574.
    Citations:    
  4. McCarty TR, Hathorn KE, Redd WD, Rodriguez NJ, Zhou JC, Bazarbashi AN, Njie C, Wong D, Trinh QD, Shen L, Stone VE, Chan WW. How Do Presenting Symptoms and Outcomes Differ by Race/Ethnicity Among Hospitalized Patients with COVID-19 Infection? Experience in Massachusetts. Clin Infect Dis. 2020 Aug 22. PMID: 32827436.
    Citations:    
  5. Chan WW, Ahuja N, Fisichella PM, Gavini S, Rangan V, Vela MF. Extraesophageal syndrome of gastroesophageal reflux: relationships with lung disease and transplantation outcome. Ann N Y Acad Sci. 2020 Aug 17. PMID: 32808313.
    Citations:    
  6. McNabb-Baltar J, Jin DX, Grover AS, Redd WD, Zhou JC, Hathorn KE, McCarty TR, Bazarbashi AN, Shen L, Chan WW. Lipase Elevation in Patients With COVID-19. Am J Gastroenterol. 2020 08; 115(8):1286-1288. PMID: 32496339.
    Citations:    
  7. Jodorkovsky D, Wong D, Din R, Sikavi DR, Lee DJH, Cai JX, Lo WK, Chan WW. Coexisting Abnormal Esophageal Body Motility Predicts Clinical Symptoms and Bolus Transit in Patients With Esophagogastric Junction Outflow Obstruction (EGJOO). J Clin Gastroenterol. 2020 Jul 08. PMID: 32649446.
    Citations:    
  8. Lo WK, Moniodis A, Goldberg HJ, Feldman N, Chan WW. Increased Acid Exposure on Pretransplant Impedance-pH Testing Is Associated With Chronic Rejection After Lung Transplantation. J Clin Gastroenterol. 2020 Jul; 54(6):517-521. PMID: 32091450.
    Citations:    
  9. Clarke JO, Ahuja NK, Chan WW, Gyawali CP, Horsley-Silva JL, Kamal AN, Vela MF, Xiao Y. Mucosal impedance for esophageal disease: evaluating the evidence. Ann N Y Acad Sci. 2020 Jun 26. PMID: 32588457.
    Citations:    
  10. Hashemi N, Viveiros K, Redd WD, Zhou JC, McCarty TR, Bazarbashi AN, Hathorn KE, Wong D, Njie C, Shen L, Chan WW. Impact of chronic liver disease on outcomes of hospitalized patients with COVID-19: A multicentre United States experience. Liver Int. 2020 Jun 25. PMID: 32585065.
    Citations:    
  11. Hathorn KE, Chan WW, Aihara H, Thompson CC. Determining the Safety and Effectiveness of Electrocautery Enhanced Scissors for Peroral Endoscopic Myotomy (with Video). Clin Endosc. 2020 Jul; 53(4):443-451. PMID: 32438778.
    Citations:    
  12. Redd WD, Zhou JC, Hathorn KE, McCarty TR, Bazarbashi AN, Thompson CC, Shen L, Chan WW. Prevalence and Characteristics of Gastrointestinal Symptoms in Patients With Severe Acute Respiratory Syndrome Coronavirus 2 Infection in the United States: A Multicenter Cohort Study. Gastroenterology. 2020 08; 159(2):765-767.e2. PMID: 32333911.
    Citations:    
  13. DeVore EK, Chan WW, Shin JJ, Carroll TL. Does the Reflux Symptom Index Predict Increased Pharyngeal Events on HEMII-pH Testing and Correlate with General Quality of Life? J Voice. 2019 Dec 14. PMID: 31848064.
    Citations:    
  14. Hathorn KE, Bazarbashi AN, Sack JS, McCarty TR, Wang TJ, Chan WW, Thompson CC, Ryou M. EUS-guided biliary drainage is equivalent to ERCP for primary treatment of malignant distal biliary obstruction: a systematic review and meta-analysis. Endosc Int Open. 2019 Nov; 7(11):E1432-E1441. PMID: 31673615.
    Citations:    
  15. Allegretti JR, Kassam Z, Fischer M, Kelly C, Chan WW. Risk Factors for Gastrointestinal Symptoms Following Successful Eradication of Clostridium difficile by Fecal Microbiota Transplantation (FMT). J Clin Gastroenterol. 2019 10; 53(9):e405-e408. PMID: 30882536.
    Citations:    
  16. Chiang AL, Galler Rabinowitz L, Kumar A, Chan WW. Association Between Institutional Social Media Involvement and Gastroenterology Divisional Rankings: Cohort Study. J Med Internet Res. 2019 09 06; 21(9):e13345. PMID: 31493321.
    Citations:    
  17. Runge TM, Jirapinyo P, Chan WW, Thompson CC. Dysphagia predicts greater weight regain after Roux-en-Y gastric bypass: a longitudinal case-matched study. Surg Obes Relat Dis. 2019 Dec; 15(12):2045-2051. PMID: 31931976.
    Citations:    
  18. Jirapinyo P, Makuvire TT, Dong WY, Chan WW, Thompson CC. Impact of Oral-Cecal Transit Time on the Interpretation of Lactulose Breath Tests After RYGB: a Personalized Approach to the Diagnosis of SIBO. Obes Surg. 2019 03; 29(3):771-775. PMID: 30627990.
    Citations:    Fields:    
  19. Borges LF, Chan WW, Carroll TL. Dual pH Probes Without Proximal Esophageal and Pharyngeal Impedance May Be Deficient in Diagnosing LPR. J Voice. 2019 Sep; 33(5):697-703. PMID: 30082108.
    Citations:    Fields:    
  20. Borges LF, Jagadeesan V, Goldberg H, Gavini S, Lo WK, Burakoff R, Feldman N, Chan WW. Abnormal Bolus Reflux Is Associated With Poor Pulmonary Outcome in Patients With Idiopathic Pulmonary Fibrosis. J Neurogastroenterol Motil. 2018 Jul 30; 24(3):395-402. PMID: 29969857.
    Citations:    
  21. Gyawali CP, Azagury DE, Chan WW, Chandramohan SM, Clarke JO, de Bortoli N, Figueredo E, Fox M, Jodorkovsky D, Lazarescu A, Malfertheiner P, Martinek J, Murayama KM, Penagini R, Savarino E, Shetler KP, Stein E, Tatum RP, Wu J. Nonerosive reflux disease: clinical concepts. Ann N Y Acad Sci. 2018 12; 1434(1):290-303. PMID: 29761528.
    Citations:    Fields:    
  22. Schulman AR, Lin MV, Rutherford A, Chan WW, Ryou M. A Prospective Blinded Study of Endoscopic Ultrasound Elastography in Liver Disease: Towards a Virtual Biopsy. Clin Endosc. 2018 Mar; 51(2):181-185. PMID: 29566479.
    Citations: 1     
  23. Jirapinyo P, Thompson AC, Kröner PT, Chan WW, Thompson CC. Metabolic Effect of Foregut Exclusion Demonstrated by the Impact of Gastrogastric Fistula on Recurrence of Diabetes. J Am Coll Surg. 2018 03; 226(3):259-266.e1. PMID: 29274838.
    Citations:    Fields:    
  24. Allegretti JR, Kassam Z, Chan WW. Small Intestinal Bacterial Overgrowth: Should Screening Be Included in the Pre-fecal Microbiota Transplantation Evaluation? Dig Dis Sci. 2018 01; 63(1):193-197. PMID: 29188472.
    Citations:    Fields:    Translation:HumansCells
  25. Lo WK, Goldberg HJ, Boukedes S, Burakoff R, Chan WW. Proton Pump Inhibitors Independently Protect Against Early Allograft Injury or Chronic Rejection After Lung Transplantation. Dig Dis Sci. 2018 Feb; 63(2):403-410. PMID: 29094310.
    Citations: 2     Fields:    Translation:Humans
  26. Patel RV, Winter RW, Chan WW, Sparks JA. Isolated gastric sarcoidosis: a rare entity. BMJ Case Rep. 2017 Jun 08; 2017. PMID: 28596201.
    Citations:    Fields:    Translation:Humans
  27. Nayor J, Rotman SR, Chan WW, Goldberg JE, Saltzman JR. Endoscopic Localization of Colon Cancer Is Frequently Inaccurate. Dig Dis Sci. 2017 08; 62(8):2120-2125. PMID: 28466261.
    Citations:    Fields:    Translation:Humans
  28. Hathorn KE, Chan WW, Lo WK. Role of gastroesophageal reflux disease in lung transplantation. World J Transplant. 2017 Apr 24; 7(2):103-116. PMID: 28507913.
    Citations: 1     
  29. Schulman AR, Ryou M, Chan WW. A Novel Hands-Free Abdominal Compression Device for Colonoscopy Significantly Decreases Cecal Intubation Time: A Prospective Single-Blinded Pilot Study. J Laparoendosc Adv Surg Tech A. 2017 Jun; 27(6):564-570. PMID: 28375709.
    Citations:    Fields:    Translation:Humans
  30. Nayor J, Maniar S, Chan WW. Appointment-keeping behaviors and procedure day are associated with colonoscopy attendance in a patient navigator population. Prev Med. 2017 Apr; 97:8-12. PMID: 28024864.
    Citations: 1     Fields:    Translation:HumansPHPublic Health
  31. Gavini S, Borges LF, Finn RT, Lo WK, Goldberg HJ, Burakoff R, Feldman N, Chan WW. Lung disease severity in idiopathic pulmonary fibrosis is more strongly associated with impedance measures of bolus reflux than pH parameters of acid reflux alone. Neurogastroenterol Motil. 2017 05; 29(5). PMID: 27987250.
    Citations: 3     Fields:    Translation:Humans
  32. Schulman AR, Chan WW, Devery A, Ryan MB, Thompson CC. Opened Proton Pump Inhibitor Capsules Reduce Time to Healing Compared With Intact Capsules for Marginal Ulceration Following Roux-en-Y Gastric Bypass. Clin Gastroenterol Hepatol. 2017 Apr; 15(4):494-500.e1. PMID: 27773764.
    Citations: 4     Fields:    Translation:Humans
  33. Schulman AR, Thompson CC, Odze R, Chan WW, Ryou M. Optimizing EUS-guided liver biopsy sampling: comprehensive assessment of needle types and tissue acquisition techniques. Gastrointest Endosc. 2017 Feb; 85(2):419-426. PMID: 27530070.
    Citations: 3     Fields:    Translation:Humans
  34. Mangla S, Goldin AH, Singal G, Hornick JL, Hsu Blatman KS, Burakoff R, Chan WW. Endoscopic Features and Eosinophil Density Are Associated with Food Impaction in Adults with Esophageal Eosinophilia. Dig Dis Sci. 2016 09; 61(9):2578-84. PMID: 27193561.
    Citations:    Fields:    Translation:HumansCells
  35. Fiorenza JP, Tinianow AM, Chan WW. The Initial Management and Endoscopic Outcomes of Dyspepsia in a Low-Risk Patient Population. Dig Dis Sci. 2016 10; 61(10):2942-2948. PMID: 26846116.
    Citations: 2     Fields:    Translation:Humans
  36. Ahuja NK, Chan WW. Assessing Upper Esophageal Sphincter Function in Clinical Practice: a Primer. Curr Gastroenterol Rep. 2016 Feb; 18(2):7. PMID: 26768897.
    Citations: 1     Fields:    Translation:Humans
  37. Lo WK, Goldberg HJ, Wee J, Fisichella PM, Chan WW. Both Pre-Transplant and Early Post-Transplant Antireflux Surgery Prevent Development of Early Allograft Injury After Lung Transplantation. J Gastrointest Surg. 2016 Jan; 20(1):111-8; discussion 118. PMID: 26493975.
    Citations: 5     Fields:    Translation:Humans
  38. Patel A, Sayuk GS, Kushnir VM, Chan WW, Gyawali CP. GERD phenotypes from pH-impedance monitoring predict symptomatic outcomes on prospective evaluation. Neurogastroenterol Motil. 2016 Apr; 28(4):513-21. PMID: 26686239.
    Citations: 8     Fields:    Translation:Humans
  39. Goldin AH, Chan WW. Current Approach to the Management of Eosinophilic Esophagitis in Adults. Curr Treat Options Gastroenterol. 2015 Dec; 13(4):441-51. PMID: 26454851.
    Citations: 1     
  40. Lo WK, Goldberg HJ, Burakoff R, Feldman N, Chan WW. Increased proximal acid reflux is associated with early readmission following lung transplantation. Neurogastroenterol Motil. 2016 Feb; 28(2):251-9. PMID: 26568193.
    Citations: 1     Fields:    Translation:Humans
  41. Lo WK, Burakoff R, Goldberg HJ, Feldman N, Chan WW. Pre-lung transplant measures of reflux on impedance are superior to pH testing alone in predicting early allograft injury. World J Gastroenterol. 2015 Aug 14; 21(30):9111-7. PMID: 26290637.
    Citations: 2     Fields:    Translation:Humans
  42. Gavini S, Finn RT, Lo WK, Goldberg HJ, Burakoff R, Feldman N, Chan WW. Idiopathic pulmonary fibrosis is associated with increased impedance measures of reflux compared to non-fibrotic disease among pre-lung transplant patients. Neurogastroenterol Motil. 2015 Sep; 27(9):1326-32. PMID: 26176338.
    Citations: 4     Fields:    Translation:Humans
  43. Schindler AE, Chan WW, Laborde CJ, Obstein KL. Reliability of the Boston Bowel Preparation Scale in the Endoscopy Nurse Population. Clin Gastroenterol Hepatol. 2016 May; 14(5):775-6. PMID: 25460559.
    Citations: 1     Fields:    Translation:Humans
  44. Lo WK, Burakoff R, Goldberg HJ, Feldman N, Chan WW. Pre-transplant impedance measures of reflux are associated with early allograft injury after lung transplantation. J Heart Lung Transplant. 2015 Jan; 34(1):26-35. PMID: 25444368.
    Citations: 7     Fields:    Translation:Humans
  45. Neumann H, Neurath MF, Vieth M, Lever FM, Meijer GJ, Lips IM, McMahon BP, Ruurda JP, van Hillegersberg R, Siersema P, Levine MS, Scharitzer M, Pokieser P, Zerbib F, Savarino V, Zentilin P, Savarino E, Chan WW. Innovative techniques in evaluating the esophagus; imaging of esophageal morphology and function; and drugs for esophageal disease. Ann N Y Acad Sci. 2013 Oct; 1300:11-28. PMID: 24117631.
    Citations:    Fields:    Translation:Humans
  46. Harding SM, Allen JE, Blumin JH, Warner EA, Pellegrini CA, Chan WW. Respiratory manifestations of gastroesophageal reflux disease. Ann N Y Acad Sci. 2013 Oct; 1300:43-52. PMID: 24117633.
    Citations: 2     Fields:    Translation:Humans
  47. Johnston N, Dettmar PW, Strugala V, Allen JE, Chan WW. Laryngopharyngeal reflux and GERD. Ann N Y Acad Sci. 2013 Oct; 1300:71-79. PMID: 24117635.
    Citations: 2     Fields:    Translation:Humans
  48. Chan WW, Mashimo H. Lubiprostone Increases Small Intestinal Smooth Muscle Contractions Through a Prostaglandin E Receptor 1 (EP1)-mediated Pathway. J Neurogastroenterol Motil. 2013 Jul; 19(3):312-8. PMID: 23875097.
    Citations: 10     
  49. Leung J, Nguyen-Traxler A, Lee EM, Yip JS, Weinstock JV, Chan WW, Ngo P, Weinstein BJ, Bonis PA. Erratum: Assessment of fractionated exhaled nitric oxide as a biomarker for the treatment of eosinophilic esophagitis. Allergy Asthma Proc. 2013 Jan 01; 34(1):107. PMID: 29165221.
    Citations:    Fields:    
  50. Lo WK, Chan WW. Proton pump inhibitor use and the risk of small intestinal bacterial overgrowth: a meta-analysis. Clin Gastroenterol Hepatol. 2013 May; 11(5):483-90. PMID: 23270866.
    Citations: 44     Fields:    Translation:Humans
  51. Leung J, Nguyen-Traxler A, Lee EM, Yip JS, Weinstock JV, Chan WW, Ngo P, Weinstein BJ, Bonis PA. Assessment of fractionated exhaled nitric oxide as a biomarker for the treatment of eosinophilic esophagitis. Allergy Asthma Proc. 2012 Nov-Dec; 33(6):519-24. PMID: 23394511.
    Citations: 6     Fields:    Translation:Humans
  52. Chan WW, Chiou E, Obstein KL, Tignor AS, Whitlock TL. The efficacy of proton pump inhibitors for the treatment of asthma in adults: a meta-analysis. Arch Intern Med. 2011 Apr 11; 171(7):620-9. PMID: 21482834.
    Citations: 14     Fields:    Translation:Humans
  53. Chan WW, Haroian LR, Gyawali CP. Value of preoperative esophageal function studies before laparoscopic antireflux surgery. Surg Endosc. 2011 Sep; 25(9):2943-9. PMID: 21424193.
    Citations: 25     Fields:    Translation:Humans
  54. Baez JC, Peters HE, Chan W, Glickman J, Mortele KJ. Carcinoid tumor of the extrahepatic bile ducts: Sonographic, cholangiographic, and MDCT features. European Journal of Radiology Extra. 2010; 73(3):e89-e92.
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Funded by the NIH National Center for Advancing Translational Sciences through its Clinical and Translational Science Awards Program, grant number UL1TR002541.