Methods: Consecutive patients with heartburn and/or acid regurgitation in outpatient and twenty-eight healthy controls were enrolled. The patients were considered as GERD if they had any of the following situations: reflux esophagitis (RE), abnormal esophageal 24 hrs pH monitoring and/or positive symptom index (SI), positive response to proton pump inhibitor (PPI) test. HRM were performed in GERD and healthy controls with ten wet swallows and ten viscous swallows in supine position. Results: Ninety-six GERD were enrolled including 37 RE patients and 61 males. GERD had lower bolus clearance rate and lower distal contractile integral (DCI) for both wet swallows and viscous swallows

comparing with healthy controls. GERD had decreased DCI (1078.5 ± 697.0 VS. 950.0 ± 616.0 mmHg●s●cm, CX-5461 chemical structure P = 0.001) and decreased contractile NVP-LDE225 front velocity (CFV) (4.8 ± 1.5 VS. 4.4 ± 1.4 cm/s, P = 0.000) in viscous swallows than that in wet swallows. RE patients had lower DCI (764.7 ± 675.4 VS. 1067.2 ± 550.6 mmHg●s●cm,

P = 0.031) than non-erosive reflux disease (NERD) in viscous swallows. Patients with abnormal pH monitoring and normal pH monitoring showed no significant differences in DCI. Conclusion: Esophageal peristalsis in GERD patients was weaker comparing with healthy controls and during viscous swallows. The peristaltic function of distal esophagus in GERD was probably related to mucosal break rather than acid exposure. Key Word(s): 1. GERD; 2. HRM; 3. NERD; Presenting Author: JIAYUAN ZHUANG Additional Authors: ZEHAO ZHUANG, DUPENG TANG, LIBIN LI, YILIN ZEN, JINGWEN SUN, FANGMING ZOU, JINGJING WEI Corresponding Author: ZEHAO ZHUANG Affiliations: The college of nurse, Fujian Medical University; Department of Gastroenterology, The first affiliated hospital of Fujian Medical University; Department of Gastroenterology,

Xiamen hospital of TCM; Department of Gastroenterology, Fuqing municipal hospital Objective: There are few data on the epidemiology of gastro-esophageal reflux disease (GERD) in Hakka population. This study was aimed MCE to assess the prevalence of GERD symptoms in Hakka population and to evaluate the effects of GERD symptoms on health-related quality of life. Methods: A face-to-face interview was carried out using a validated Chinese Gastro-esophageal reflux disease Questionnaire (CGQ) to evaluate the prevalence of GERD symptoms in a selected Hakka population in Youding County, Fujian Province. A randomly clustered sampling of permanent inhabitants aged 18 to 82 years was carried out in this Hakka’s community. The effects of GERD symptoms on health-related quality of life were evaluated by SF-36 (Chinese version). Results: A total of 203 residents (104 M, 99 F) were investigated. Median age of the responders was 43 years; while the response rate was 97.6%.