Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0017168 (gastroesophageal reflux disease)
 11,783 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Twenty-four-hour continuous esophageal pH monitoring has become the preferred test to quantify acid gastroesophageal reflux. Agreement has been achieved that acid gastric content reflux into the esophagus constitutes a major cause of reflux esophagitis; we therefore calculated the "area under pH 4" (A) in 560 consecutive pH monitorings in infants 1-12 months old and related this parameter (A) to the reflux index (RI): RI less than 10%: A 185 +/- 295 (mean +/- 1 SD); RI 10-19%: A 1,046 +/- 1,206; RI 20-29%: A 1,967 +/- 2,038; RI 30-39%: A 3,307 +/- 2,955; RI greater than 40%: A 7,977 +/- 7,227. A higher RI is associated with a greater area under pH 4 (p less than 0.001); the high SD obtained in each group, however, illustrates the great variability in surface (or acidity of the reflux episodes) in all groups. Esophagoscopy and biopsy were performed in 112 infants (20%). Specificity in the prediction of (mild) esophagitis was higher for the area under pH 4 (88%) compared with the RI (50%). The sensitivity of both parameters was comparable (96 versus 93%). Our results strongly suggest that in young infants, the acidity of the reflux episodes (the area under pH 4) is a determining factor in the prediction of esophagitis. These data need to be confirmed by more studies before general application of this parameter can be advised.
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PMID:Area under pH 4: advantages of a new parameter in the interpretation of esophageal pH monitoring data in infants. 277 67

Barrett's esophagus is a common finding in patients with gastroesophageal reflux and is associated with a high incidence of serious complications (stricture, ulceration, and carcinoma). The reason that only a portion of patients with reflux develop Barrett's esophagus and why some are prone to develop complications is unknown. Twenty-three patients with Barrett's esophagus underwent endoscopy, 24-hour esophageal pH monitoring, and manometry. Nine of these patients with gastritis underwent 24-hour gastric pH monitoring, and three with symptoms of duodenogastric reflux underwent 99mTc-labeled hepato-iminodiacetic acid scanning. Patients with complicated (n = 12) and uncomplicated (n = 11) Barrett's esophagus were compared with each other and with patients with reflux esophagitis (n = 53) and normal volunteers (n = 50). Patients with Barrett's esophagus showed an increased exposure to acid and alkaline gastric juice compared with patients with esophagitis and normal volunteers. In the patients with Barrett's esophagus with and without complications, there was no significant difference in age, incidence of defective lower esophageal sphincter, incidence of defective peristalsis, extent of the Barrett's epithelium, or percent time the esophageal pH was less than 4. In contrast, the percent time the esophageal pH was greater than 7 was significantly greater in patients with complications. This alkaline exposure is likely to be related to duodenogastric reflux. This was supported by positive gastric pH scores for duodenogastric reflux and 99mTc-labeled hepato-iminodiacetic acid scans in patients with Barrett's complications. These findings suggest that the development of complications in Barrett's esophagus is the result of the damaging effect of refluxed duodenal juice.
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PMID:Alkaline gastroesophageal reflux: implications in the development of complications in Barrett's columnar-lined lower esophagus. 279 52

Between 1985 and 1987, 25 patients had abdominal operations for hiatal hernia and/or gastroesophageal reflux disease. Eight of them had complicated reflux esophagitis. One patient had a Belsey Mark IV repair, the others had a Nissen fundoplication. There was no mortality. After a median follow-up of 16 months (range 3-38) six patients had symptoms of "gas-bloat". The esophagitis was healed in ten patients. 22 patients were completely or fairly satisfied with the results of the surgery. Two patients were not satisfied. Both had complicated reflux esophagitis before they were operated on. Patients with esophagitis should be evaluated for surgery before stricture or Barrett's ulcer develop.
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PMID:[Hiatal hernia and reflux esophagitis]. 281 8

Esophageal reflux should be treated only if symptoms are severe enough for patients to seek therapy or if esophagitis results. One study found that the number of reflux episodes lasting more than 5 min was the best indicator of esophagitis. Factors such as efficiency of the antireflux barrier, esophageal clearing, and aggressive power of refluxed material impact on the pathogenesis of reflux esophagitis. Therapy should be aimed at these factors and depends on severity of disease. Dietary measures, postural measures, and drug therapy can be used to alleviate symptoms and/or improve healing of esophageal lesions, with surgery recommended only in rare cases. Antacids, Gaviscon, and motor-stimulating drugs (metoclopramide, domperidone, bethanechol) may be sufficient to treat pathologic reflux without esophagitis. Once erosive or ulcerative lesions have developed, more rigorous medical treatment including H2 receptor blockers is mandatory.
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PMID:Medical management of reflux esophagitis. 286 36

Vomiting, hematemesis, and esophagitis resulting from gastroesophageal reflux or hiatal hernia are frequently observed in severely handicapped children. This study was conducted to determine whether the use of a new H2-antagonist, famotidine, could prevent recurrence of reflux esophagitis among such children. Seventeen severely handicapped, bedridden children admitted to a children's medical center between April 1985 and September 1986 were studied. All had vomiting or hematemesis as a main symptom, and the cause of esophagitis was suggested to be gastroesophageal reflux in 13 cases and hiatal hernia in four. Six had been previously treated with cimetidine or other drugs or a combination thereof without relief. Famotidine was administered at about 1 to 2 mg/kg/day, two times daily to patients weighing more than 10 kg and three times daily to those weighing less than 10 kg. In 13 cases, famotidine was administered intravenously for between seven and ten days and then given orally, while the rest were given the drug orally from the outset. The following results were obtained: (1) improvement was seen within seven days after start of famotidine treatment, and reduction of vomiting or hematemesis or both was reached within two weeks in 70% of cases and within three weeks in 94%; (2) famotidine was markedly effective in 29% and moderately effective in 41%; in no case was the drug ineffective; (3) no side effects were observed; five patients had transient, mild elevation of SGOT . SGPT, but this was not attributable to the drug.
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PMID:Effect of a new H2-blocker, famotidine, in reflux esophagitis among severely handicapped children. 288 29

The healing effect of the prokinetic drug cisapride (10 mg q.i.d.) on esophageal lesions, and its therapeutic control of gastroesophageal reflux symptoms were compared with the effects of the H2-antagonist ranitidine (150 mg b.i.d. + placebo b.i.d.) in a double-blind trial. In each group, 28 patients with Savary-Miller Grade I or II esophagitis were treated for 6 or 12 weeks. At the end of treatment, follow-up endoscopy showed that mucosal lesions were absent in 89% of the cisapride patients and in 79% of the ranitidine patients. In addition, 86% and 82% of the patients in the cisapride and the ranitidine group, respectively, had no, or only mild, reflux symptoms. Minor side effects were experienced in both groups. From these data, cisapride appears to be as effective as ranitidine in controlling reflux symptoms and in promoting the healing of mucosal lesions in milder forms of reflux esophagitis.
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PMID:Cisapride versus ranitidine in the treatment of reflux esophagitis. 304 76

In a medical literature revision, actual concepts about esophageal inferior sphincter's importance are presented. It is the principal object on studies about clinical and surgical therapeutic procedures for gastroesophageal reflux. Thus, esophageal manometric study, fundamental for physiological knowledge of the organ, conducts the reflux esophagitis therapy.
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PMID:[Esophageal manometry for the study of gastroesophageal reflux]. 306 6

This review critically evaluates the gastroduodenal factors that may play a clinically relevant role in the pathogenesis of reflux esophagitis. The gastroesophageal pressure gradient is of obvious importance, but the role of gastric contraction/relaxation is poorly understood. The intragastric volume, as well as the factors that influence it, could theoretically play a role in gastroesophageal reflux (GER). For example, suppression of gastric emptying and gastric motility would be expected to increase GER, and treatment with gastrokinetic agents appears to provide symptomatic improvement. However, only a fraction of patients with GER have delayed gastric emptying, and there is no correlation between either subjective epigastric fullness or esophagitis on one hand and gastric emptying on the other hand. Gastric acid and pepsin, and possibly the hypersecretion of acid, play a pivotal role in reflux esophagitis, as demonstrated by the efficacy of the treatment with histamine H2 antagonists and antacids. Other important factors in experimental esophagitis are duodenogastric reflux, the presence of bile acids in the gastric contents, as well as trypsin if the pH is alkaline. It is suggested that these important findings may lead to novel therapeutic approaches of reflux esophagitis.
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PMID:Clinical relevance of gastroduodenal dysfunction in reflux esophagitis. 309 Jan 34

Esophagitis occurs in patients with excessive acid and/or alkaline gastroesophageal reflux. This observation prompted us to develop a continuously perfused in vivo rabbit esophageal model to examine the potential for different endogenous injurious agents to cause H+ back diffusion and morphologic evidence of esophagitis. We found that HCl at physiologic pH values did not break the mucosal barrier to H+ back diffusion or cause esophagitis. Bile salts at physiologic concentrations in both an acid or alkaline perfusate broke the mucosal barrier and caused H+ back diffusion, but failed to cause a morphologic injury consistent with clinical reflux esophagitis. Instead, proteolytic enzymes, such as pepsin in an acid environment and trypsin in an alkaline environment, caused a severe hemorrhagic erosive esophagitis consistent with that seen clinically. We feel new therapeutic strategies for the treatment of reflux esophagitis should be directed at proteolytic enzymes rather than only HCl or bile salts. Finally, we showed sucralfate to be a mucosal protectant against the acid-pepsin injury.
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PMID:Experimental esophagitis in a rabbit model. Clinical relevance. 309 Jan 35

Three different periods of intraesophageal pH-recording (24 h, 12 h, and 10 h postprandially) have been compared in 20 healthy subjects and in 20 outpatients with symptoms and endoscopic signs of peptic esophagitis, to assess their relative values of sensitivity and specificity in the diagnosis of gastroesophageal reflux. No false-positive results were obtained during any of the periods, thus yielding a 100% specificity. However, the sensitivity shown by the 24-h period of esophageal pH-recording was 81%, whereas that for the 12-h period was 50% and that for 10 h postprandially 70%. Also, no significant differences were observed in terms of the patients' tolerability for the test during any of the three periods. We therefore conclude that 24-h esophageal pH-recording is the method of choice in ambulatory diagnosis of gastroesophageal reflux.
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PMID:Comparison of three methods of intraesophageal pH recordings in the diagnosis of gastroesophageal reflux. 317 34


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