Interaction of gastroesophageal reflux and esophageal motility

The present study addresses the question of whether esophageal motility shortly before, during, and after gastroesophageal reflux (GER) is different in patients with GER disease and healthy controls. Twenty-four-hour continuous recordings of intraesophageal pressures and pH were performed in 12 unselected patients with clinically proven GER disease and in 11 volunteers using a new ambulatory and digital recording device. All GER episodes in each studied subject were classified according to their associated motility pattern shortly before (induction period) and during (response period) GER. More GER episodes were analyzed in patients than in volunteers (median: 41 vs 26, P<0.05), and a total of 917 GER episodes (593 in patients, 324 in volunteers) was recorded. During the induction period patients more often had irregular esophageal contractions (median: 23% vs 13%, P<0.05) and less often had a peristaltic sequence (median: 6% vs 21%) than normals. No difference between patients and controls existed when comparing the frequency of negative pressure peaks or common cavity phenomena shortly before GER. During the response period peristaltic motility in patients was decreased (median: 10% vs 47%, P<0.05). We conclude that: (1) GER events in GER patients are more often associated with irregular esophageal contractions than in healthy controls; (2) GER patients present with a diminished, if any, esophageal peristalsis during GER; and (3) combined ambulatory manometry and pH-metry provides clinically useful information on the individual pathogenesis of GER disease, which is superior to the information retrieved by pH-metry alone.Preliminary results from this study were presented at the Third International Polydisciplinary Congress on Primary Esophageal Motility Disorders in Paris, held from May 19th until 23th 1990.     

马来酸曲美布汀对伴有无效食管动力的胃食管反流病患者食管运动功能的影响

[目的]观察马来酸曲美布汀对伴有无效食管动力的胃食管反流病患者食管运动功能的影响。[方法]对经内镜、24h食管pH-阻抗监测诊断为胃食管反流病,并行高分辨率食管压力测定(high resolution manometry,HRM),依据芝加哥3.0版标准诊断为无效食管动力的16例患者,给予马来酸曲美布汀0.2g tid、埃索美拉唑20mg、bid治疗2周后复查HRM,比较治疗前后下食管括约肌静息压(LESP)、食管体部各段波幅及时限、吞咽成功率、失蠕动比例、弱蠕动比例以及远端收缩积分(DCI)值等指标的变化。[结果]16例患者治疗前后LESP变化差异无统计学意义(P0.05),在LESP明显降低的7例患者中,与治疗前相比,治疗后LESP明显增加[(1.8±0.9)mmHg(1mmHg=0.133kPa)∶(8.2±5.4)mmHg],差异有统计学意义(P0.05);液体吞咽中,食管中段收缩波幅较治疗前明显增加[(33.7±11.4)mmHg∶(42.7±19.9)mmHg)],P0.05;黏性吞咽中,食管远端收缩波幅较治疗前明显增加[(44.7±18.4)mmHg∶(57.5±23.4)mmHg],P0.05;液体吞咽时,失蠕动比例较治疗前均显著下降,P0.05;液体及黏性吞咽时,DCI值均较治疗前明显增加,P0.05。在液体吞咽时,吞咽成功率较治疗前增加,差异有统计学意义,P0.05。[结论]马来酸曲美布汀可能增加合并下食管括约肌低压的GERD患者的LESP,通过增加食管体部收缩波幅,改善合并无效食管动力的GERD患者食管体部的廓清功能。     

Effects of mosapride on esophageal functions and gastroesophageal reflux

Background and Aim: A substantial number of patients with gastroesophageal reflux disease show symptomatic resistance to high‐dose proton pump inhibitors. In those cases, prokinetics are possible candidates for treatment. The aim of the present study was to determine whether mosapride, a prokinetic agent, stimulates esophageal functions, and prevents acidic and non‐acidic gastroesophageal reflux. Methods: Normal volunteers (nine and 13 for two experiments, respectively) were enrolled. Salivary secretion, esophageal peristaltic contractions, and resting lower esophageal sphincter pressure with and without mosapride administration were recorded using a cross‐over protocol. Post‐prandial acidic and non‐acidic reflux levels were also recorded. Results: Mosapride at a standard dose of 15 mg/day did not stimulate salivary secretion or any esophageal motor functions. It also failed to prevent acidic and non‐acidic post‐prandial gastroesophageal reflux. Conclusions: Mosapride at 15 mg/day, a standard dose in Japan, did not change the esophageal motility and salivary secretion in healthy volunteers. Future study on a larger number of individuals with higher dose of mosapride is worthwhile.     

Evaluation of gastric emptying by electrogastrography and ultrasonography in gastroesophageal reflux disease

Background: It has been suggested that transient lower esophageal sphincter relaxation is involved in the occurrence of gastroesophageal reflux disease (GERD) and that decreased gastric emptying is an exacerbating factor of transient LES relaxation. In addition, the gastric emptying function is considered to be closely related to gastric motility. Methods: Gastric activity was evaluated by electrogastrography (EGG) in 22 patients with endoscopically positive reflux esophagitis (15 with mild esophagitis of Los Angeles grade A or B and seven with severe esophagitis of Los Angeles grade C or D) and 20 normal individuals. The gastric emptying function was also evaluated by abdominal ultrasonography. The sampling cycle of EGG was 1 s, and the measured frequency was 2.1–6.0 cycle/min (c.p.m.). The mean amplitude of EGG was compared by EGG spectral analysis among brady‐gastria cases with a contraction frequency of less than 2.4 c.p.m., normo‐gastria cases with a contraction frequency of 2.4–3.6 c.p.m., and tachy‐gastria cases with a contraction frequency exceeding 3.6 c.p.m. Results: In the patients with GERD, both the frequency of 3‐c.p.m. waves and peak frequency were reduced, and the gastric emptying function examined by ultrasonography had deteriorated, in comparison with normal individuals. Of those with GERD, the ultrasonographic gastric emptying function was significantly reduced in all patients with severe esophagitis compared with those with mild esophagitis, but the differences of the frequency of 3‐c.p.m. waves, the peak frequency, were not significant. Also, no significant difference was observed in the frequency of 3‐c.p.m. waves or the ultrasonographic gastric emptying function between the 16 patients with hiatal hernia and the six patients with no hiatal hernia. However, the mean amplitude in brady‐gastria and tachy‐gastria was significantly increased in the patients with hiatal hernia compared to those without hiatal hernia. Conclusions: Reduced gastric motility was suggested to be involved in the development of reflux esophagitis, and the presence of hiatal hernia was considered to have some effect on gastric motility.     

Reliability of 24-hour home esophageal ph monitoring in diagnosis of gastroesophageal reflux

Twenty-four-hour home esophageal pH monitoring is proposed in order to study gastroesophageal reflux (GER) so that prolonged use of costly hospital equipment and staff can be curtailed and the diagnostic accuracy of the examination improved. Eighty-six patients affected by GER symptoms and 20 healthy volunteers underwent 24-hr home esophageal pH monitoring, x-rays, and endoscopy of the upper gastrointestinal tract to investigate reliability of outpatient recording. Fifteen more patients consecutively underwent out- and inpatient recording to detect possible differences between these methods in the two daily periods. Outpatient monitoring was well tolerated in 94.7% of the patients; 14.3% of them markedly reduced their routine activities. The range of normality of outpatient recording does not differ from that of inpatients. In the 15 patients who consecutively underwent out-and inpatient monitoring, no significant differences were reported. The sensitivity of 24-hr home esophageal pH recording is 0.85, the specificity 1, the accuracy for negative prediction 0.68, and the accuracy for positive prediction 1. The reliability of 24-hr home esophageal pH monitoring is comparable to inpatient recording. It allows hospital cost reduction and is also better tolerated by patients but has not greatly improved the diagnostic accuracy of the gastroesophageal reflux pH monitoring.Supported by the Ministere Pubblica Istruzione, Rome; and Finanziamenti per studi e ricerche 40%, Com. 06, Cat 12-07 imp. 11515, University of Bologna.     

Basal acid output and gastric acid hypersecretion in gastroesophageal reflux disease

The purpose of this study was to evaluate possible differences in basal gastric acid secretion with regard to severity of gastroesophageal reflux disease. Basal acid output was determined by nasogastric suction in 228 patients with gastroesophageal reflux disease who received upper gastrointestinal endoscopy and were diagnosed with either pyrosis alone (N = 98), erosive esophagitis with or without pyrosis (N = 87), or Barrett's esophagus (N = 43). Mean basal acid output for the 228 patients with gastroesophageal reflux disease was 6.5 ± 5.6 meq/hr, which was significantly different from 65 normal subjects with a mean basal acid output of 3.0 ± 2.7 meq/hr (P < 0.0001). Compared to normal subjects, mean basal acid outputs significantly differed for patients with pyrosis (P < 0.05), esophagitis (P < 0.01), and Barrett's esophagus (P < 0.01). There was also a significant difference in mean basal acid output between the patients with pyrosis and Barrett's esophagus (P < 0.01). Nineteen of the 98 patients with pyrosis (19%), 24 of the 87 patients with esophagitis (28%), and 15 of the 43 patients with Barrett's esophagus (35%) had gastric acid hypersecretion (basal acid output greater than 10.0 meq/hr). One hundred forty-six patients with gastroesophageal reflux disease were treated with ranitidine in doses that resulted in complete healing of esophagitis and disappearance of pyrosis. Ninety-three patients responded to ranitidine 300 mg/day; however, 53 patients required increased dose of ranitidine (mean 1205 mg/day, range 600–3000 mg/day). There was a significant correlation between basal acid output and daily ranitidine dose required for therapy for the 146 patients with gastroesophageal reflux disease (r = 0.53,P = 0.0001). Furthermore, a significant association was also found between the presence of gastric acid hypersecretion and the requirement for increased doses of ranitidine (greater than 300 mg/day) (P = 0.00001). These results indicate that there is a subset of patients with gastroesophageal reflux disease who do have idiopathic gastric acid hypersecretion. Moreover, these patients have an apparently higher requirement for medication dosage in order to achieve therapeutic efficacy.     

Influence of gastric morphology on gastroesophageal reflux in adults: An observational study

The study''s aim was to determine if there was an association between gastric morphology and gastroesophageal reflux (GER). Few published studies have investigated the relationship between gastric morphology and the risk of GER.A total of 777 patients were randomly selected from 3000 to 3300 patients who presented at a medical center in Taipei for annual health checkups from early 2008 through to late 2010 and underwent a series of radiographs of the upper gastrointestinal tract (UGI). GER was recorded during the real-time fluoroscopic study. Thirty-nine participants had a follow-up endoscopy, and another 164 participants were followed up by a second UGI series 12 +/ −1.5 months later, from late 2008 through to early 2022. All participants completed a lifestyle and symptom questionnaire. The variables included current smoking and alcohol consumption. Participants who had heartburn and dysphagia were included in the study. Additionally, all participants underwent a limited physical examination which recorded age, sex, body mass index, and total cholesterol and triglyceride levels.All participants were classified into types 1 to 6 based on the gastric morphology determined from the first UGI. Cascade stomach is recognized by characteristic findings on UGI. Gastric types 2 and 3 tend to appear as cascade stomachs and were significantly associated with GER (P < .05) compared with the other groups. Morphologic type 5 appeared as an elongated sac extending downward into the pelvic cavity and was less likely to develop GER (P < .001). The results of follow-up studies by UGI and endoscopy were similar to those of the first UGI. Gastric morphologic type 2 was significantly associated, and type 5 was usually not associated, with GER and erosive esophagitis (P < .05) compared with the other groups, by both UGI and endoscopy.Gastric morphologic types 2 and 3, with cascade stomach, might provide a relatively easy method for the development of the GER phenomenon. Gastric morphologic type 5 appeared as an elongated sac that might reduce the incidence of the GER phenomenon. The study suggested that gastric morphologic type could influence the occurrence of GER.     

胃及十二指肠液对食管粘膜损伤的实验研究

目的：通过动物实验,研究胃及十二指肠液反流对食管粘膜的损伤情况及其分别在胃食管反流病（ｇａｓｔｒｏｅｓｏｐｈａｇｅａｌ ｒｅｆｌｕｘ ｄｉｓｅａｓｅ,ＧＥＲＤ）发病中所占的地位。方法通过不同手术方式制作三种食管反流动物模型,分别为单纯胃液反流（Ｇ组）、单纯十二指肠内容物反流（Ｄ组）及十二指肠胃内容物混合反流（ＤＧ组）。于不同病程分批取得食管标本进行大体及光镜下形态学。结果各实验组出现程度不等的反流     

胃食管反流病中医分型与酸反流的关系

目的研究胃食管反流病(gastroesophageal reflux disease,GERD)的中医的辨证分型与酸反流各项指标的关系,为本病辨证分型寻求特征性的客观指标.方法通过对97例经24 h食管pH值动态监测和内镜检查确诊为GERD的患者的临床观察,以临床四诊资料为基础,在中医理论指导下,对其进行病位、病性、病因、病机的辨证分析,从而筛选出本病的主要证型.在此基础上,选用24 h食管pH值动态监测的多项酸反流指标,运用多种统计学分析方法,研究各主要证型与食管酸反流多项指标之间的关系.结果 GERD 97例的辨证分型筛选出的主要证型有肝胃郁热、肝胃不和、脾胃虚弱、胃热气逆、痰气郁阻5型.总反流次数在肝胃郁热型中显著高于肝胃不和、脾胃虚弱、痰气郁阻型,在胃热气逆型中显著高于脾胃虚弱、痰气郁阻型(P＜0.05);总pH＜4时间百分率和反流总分在肝胃郁热、肝胃不和、胃热气逆型中显著高于脾胃虚弱型(P＜0.05).酸反流的症状指数≥50%病例数的百分率在肝胃不和、肝胃郁热、胃热气逆型中极显著高于其余各证型(P＜0.01).酸反流体位分型为混合型的病例数的百分率在脾胃不和、痰气郁阻型中显著高于其余各证型(P＜0.05).结论 GERD的中医辨证分型与某些食管酸暴露参数之间存在明显关系.     

Effects of oral erythromycin on esophageal pH and pressure profiles in patients with gastroesophageal reflux disease

Erythromycin, a possible motilin agonist, is a potent gastrokinetic agent that may increase the lower esophageal sphincter pressure. Therefore, we assessed the effects of erythromycin in two dosages (250 and 500 mgper os four times a day) on esophageal pH and pressure profiles in reflux patients using prolonged ambulatory monitoring systems. Studies were blinded, placebo-controlled with randomized crossover design. Patients took each drug for three days prior to studies, with erythromycin serum levels obtained the day of esophageal studies. Erythromycin 250 mg four times a day had no effect on esophageal contraction pressures or peristalsis during the day or meal periods. In the supine position, however, erythromycin significantly (P=0.012) decreased esophageal contraction velocity and showed a strong trend (P=0.059) towards increasing the percentage of peristaltic waves. Despite these potentially beneficial effects on esophageal clearance, no significant difference in acid exposure times during 24-hr pH studies were observed between placebo and low-dose erythromycin. High-dose erythromycin (500 mg four times a day) was associated with drug levels in the typical antibiotic efficacy range (normal 1–3 µg/ml; patients 1.7–7.0 µg/ml), but, here again, there was no significant difference in all acid reflux parameters between placebo and erythromycin phases. Therefore, standard doses of erythromycin have no important clinical effects on esophageal pressures or acid reflux parameters.     

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目的探讨非糜烂性胃食管反流病不同于反流性食管炎的发病机制。方法选择1996～2004年北京大学人民医院因反酸、胃灼热感等反流症状确诊为胃食管反流病患者57例,按照内镜下食管黏膜有无破损分为非糜烂性胃食管反流病组和反流性食管炎组,比较两组的一般情况、反流症状、是否合并H.pylori(Hp)感染,以及食管动力测定和食管胃24hpH监测结果。结果两组患者年龄、性别、烟酒嗜好等一般情况及合并Hp感染情况比较差异无显著性。非糜烂性胃食管反流病组不典型反流症状(胸骨后痛)的发生率明显高于反流性食管炎组。两组患者都存在病理性酸反流,但两组患者之间酸和(或)碱反流比较无差异。非糜烂性胃食管反流病患者的食管体部各段蠕动波峰值明显高于反流性食管炎患者。非糜烂性胃食管反流病患者卧位胃酸分泌高于反流性食管炎患者。结论非糜烂性胃食管反流病的不典型反流症状发生率更高。在两组发病机制异同上,反流的强弱并非主要因素,重要的是食管防御机制的差别。     

Helicobacter pylori and gastroesophageal reflux disease: a review of this intriguing relationship

A possible association between gastroesophageal reflux disease (GERD) and Helicobacter pylori ( H. pylori ) infection has been the subject of study and debate in recent years. This review discusses the pathophysiological and immunological mechanisms implicated in this relationship. Although gastric secretion in the majority of H. pylori -infected individuals is unaltered, this review considers how the bacteria may interfere with gastric acid production and what role it may play in GERD. We also identify the epidemiological evidence that confirms that GERD develops after the infection has been eradicated. Lastly, we clarify how the host's immune response and bacterial virulence factors interfere with this relationship, explaining the highly conflicting results in the literature.     

Correlation of 24-hr esophageal pH patterns with clinical features and endoscopy in gastroesophageal reflux disease

We performed 24-hr ambulatory esophageal pH monitoring in north Indian patients with gastroesophageal reflux disease (GERD) and correlated it with symptom severity and endoscopic abnormalities. Thirty-six consecutive patients with symptomatic GERD and 16 healthy volunteers underwent objective grading of clinical symptoms and endoscopic findings. Total, supine, and upright reflux periods as well as frequency and duration of reflux episodes were determined from the 24-hr pH-metry record using standard software. This was abnormal in 32 patients, who could be categorized into upright refluxers (31.2%), supine refluxers (34.4%), and combined refluxers (34.4%). Supine reflux and upright reflux were distinct entities that did not correlate with each other (r=0.22,P=NS). In upright refluxers, symptoms (P<0.02) and=" endoscopic=" abnormalities=">P<0.005) were=" milder=" than=" in=" combined=" refluxers.=" total=" duration=" of=" acid=" exposure=" correlated=" significantly=" with=" severity=" of=" symptoms=">P<0.001) and=" endoscopic=" esophagitis=">P<0.005). patients=" with=" gerd=" had=" three=" distinct=" patterns=" of=" abnormal=" gastroesophageal=" reflux,=" with=" upright=" refluxers=" having=" milder=" disease=" and=" supine=" and=" combined=" refluxers=" having=" more=" severe=" disease.=" this=" may=" reflect=" differences=" in=" underlying=" mechanisms=" of=">     

Effects of transjugular intrahepatic portosystemic shunt (TIPS) on esophageal motor function and gastroesophageal reflux

The effects of transjugular intrahepatic portosystemic shunt (TIPS) placement on esophageal motor function and gastroesophageal reflux were investigated in patients with esophageal varices. In six men with esophageal varices, esophageal manometry and upper gastrointestinal endoscopy were performed before and 15–20 days after TIPS placement. Intraesophageal pH monitoring was performed in the four patients with severe esophageal varices (defined as the largest sized varices) following TIPS placement. Findings were compared with those in six healthy men (controls) who underwent esophageal manometry and intraesophageal pH monitoring. The esophageal varices resolved or were reduced after TIPS placement. Resting lower esophageal sphincter (LES) pressures were similar in the study group before and after TIPS placement and in the control subjects. The incidence and progression of esophageal contractions were similar in the study group before and after TIPS placement and in the control subjects. At 3 cm above the LES, the amplitude of esophageal contraction after TIPS placement was significantly higher than that before TIPS placement. At 3 and 8 cm above the LES, the amplitude of esophageal contraction in the control subjects was significantly higher than that in the study group before and after TIPS placement. Esophageal acid exposure time after TIPS placement was similar to that in the controls. TIPS placement is a useful treatment that improves esophageal motor function without the occurrence of pathologic gastroesophageal reflux. (Received May 28, 1997; accepted Sept. 26, 1997)     

非糜烂性反流病食管黏膜超微结构研究

目的探讨非糜烂性反流病(NERD)病理性酸反流组及生理性酸反流组,其食管黏膜细胞间隙及桥粒数目等超微结构的变化情况。方法对10例健康志愿者(对照组)、39例NERD患者及10例反流性食管炎(RE)患者进行内镜检查并作食管黏膜活检,透射电镜观察标本。图像分析仪测量食管黏膜细胞间隙宽度,同时统计相应间隙中的桥粒数目。结果RE组及NERD组的细胞间隙宽度分别为(2.39±0.42)μm及(2.21±0.68)μm,两组间差异无统计学意义(P〉0.05)。对照组细胞间隙宽度为(0.63±0.21)μm,明显小于RE组及NERD组(P〈0.05)。NERD病理性酸反流组及生理性酸反流组的细胞间隙宽度分别为(2.45±0.67)μm及(1.91±0.67)μm,两组间差异有统计学意义(P〈0.05)。RE组及NERD组的桥粒数目均数分别为(0.124±0.044)个/μm2及(0.141±0.043)个/μm2,两组间差异无统计学意义(P〉0.05),但均少于对照组[(0.221±0.031)个/μm2],P〈0.05。NERD病理性酸反流组的桥粒数目[(0.110±0.032)个/μm2]明显少于生理性酸反流组[(0.171±0.028)个/μm2]。结论NERD组的细胞间隙明显宽于正常对照组,但与RE组无明显差别。NERD病理性酸反流组的细胞间隙明显宽于生理性酸反流组;细胞间隙间的桥粒数目也可能是酸诱导的细胞损伤标志。     

Postprandial proximal gastric acid pocket and gastroesophageal reflux disease

An unbuffered layer of acidity that escapes neutralization by food has been demonstrated in volunteers and gastroesophageal reflux disease patients. This postprandial proximal gastric acid pocket (PPGAP) is manometrically defined by the presence of acid reading (pH < 4) in a segment of the proximal stomach between nonacid segments distally (food) and proximally (lower esophageal sphincter or distal esophagus). The PPGAP may have important clinical implications; however, it is still poorly understood. Gastric anatomy and physiology seem to be important elements for PPGAP genesis. Gastric operations and acid suppression medications may decrease distal – proximal intragastric acid reflux and help control gastroesophageal reflux.