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Related Concept Videos

Gastroesophageal Reflux Disease01:25

Gastroesophageal Reflux Disease

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Gastroesophageal reflux disease (GERD) is the backward flow of stomach contents (acid, pepsin, or bile) into the esophagus, causing mucosal inflammation known as esophagitis. It results from failure of antireflux mechanisms, mainly the lower esophageal sphincter (LES), influenced by mechanical and physiological factors.Etiology and Risk FactorsGERD develops when LES function is weakened or when intra-abdominal pressure increases. Risk factors include aging, obesity, and sliding hiatal hernia,...
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Gastroesophageal Reflux Disease I: Meaning and Pathophysiology01:29

Gastroesophageal Reflux Disease I: Meaning and Pathophysiology

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Gastroesophageal Reflux Disease (GERD) involves the recurrent backflow of the stomach or duodenal contents into the esophagus, leading to troublesome symptoms and potential esophageal mucosal damage. Although GERD is often referred to as a disease, it is more accurately described as a syndrome, as it encompasses a range of symptoms and complications rather than a singular pathological entity, impacting a large number of individuals as the most prevalent upper gastrointestinal problem. Roughly...
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Gastroesophageal Reflux Disease II: Clinical Features and Management01:29

Gastroesophageal Reflux Disease II: Clinical Features and Management

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Gastroesophageal reflux disease, or GERD, is a persistent medical condition that affects many individuals worldwide. Its clinical manifestations can vary greatly, making diagnosis and management challenging for healthcare professionals. The following is a comprehensive overview of the clinical manifestations, assessment, and management strategies for GERD.
Clinical Manifestations
GERD presents itself in a multitude of ways, with symptoms varying from person to person. The hallmark symptoms are...
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Esophageal Achalasia01:27

Esophageal Achalasia

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Esophageal achalasia is a chronic neurogenic disorder characterized by impaired relaxation of the lower esophageal sphincter (LES) and absent or ineffective peristalsis in the distal esophagus. This leads to a functional obstruction without a physical blockage, despite significant disruption of esophageal motility.EtiologyAchalasia is caused by degeneration of the myenteric (Auerbach's) plexus, specifically the loss of inhibitory ganglion cells that produce vasoactive intestinal peptide...
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Barrett Esophagus-II: Clinical Manifestations and Management01:21

Barrett Esophagus-II: Clinical Manifestations and Management

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Individuals with Barrett's esophagus are often asymptomatic, but they may experience symptoms commonly associated with GERD, such as heartburn and acid regurgitation. Additional symptoms can include difficulty swallowing, chest pain, unintentional weight loss, blood in the stool (which may appear black, tarry, or bloody), and episodes of vomiting.
To diagnose Barrett's esophagus, healthcare providers often recommend an endoscopy for those showing symptoms of acid reflux. The procedure...
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Barrett Esophagus-I: Introduction01:21

Barrett Esophagus-I: Introduction

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Barrett's esophagus is a medical condition where the esophageal mucosa is significantly damaged by stomach acid or other digestive fluids, often due to long-term exposure associated with gastroesophageal reflux disease (GERD). In GERD, a weakened or abnormally relaxed lower esophageal sphincter allows stomach acid to flow persistently into the esophagus.
This constant acid exposure transforms the esophagus's pink mucosal lining (stratified squamous epithelium) into a type of lining more...
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[Iron deficiency syndromes and their correction with nutritional support in elderly patients with colo-rectal cancer.]

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[NERVOUS REGULATION OF BILIARY TRACT MOTILITY].

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THE ROLE OF BILE ACIDS IN THE REGULATION OF LIPID AND CARBOHYDRATE METABOLISM IN PATIENTS WITH NONALCOHOLIC FATTY LIVER DISEASE AND DIABETES TYPE2.

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Related Experiment Video

Updated: Apr 28, 2026

Surgical Models of Gastroesophageal Reflux with Mice
05:19

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Published on: August 25, 2015

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[Gastroesophageal reflux disease model].

A É Lychkova, Iu V Vasil'ev, A V Limantsev

    Eksperimental'Naia I Klinicheskaia Gastroenterologiia = Experimental & Clinical Gastroenterology
    |June 18, 2014
    PubMed
    Summary
    This summary is machine-generated.

    A novel rat model for gastroesophageal reflux disease was developed using methylene blue. This model allows for the observation of esophageal activity and mucosal changes following reflux induction.

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    Area of Science:

    • Gastroenterology
    • Physiology
    • Pharmacology

    Context:

    • Gastroesophageal reflux disease (GERD) is a common condition requiring effective animal models for research.
    • Current models may not fully capture the dynamic physiological changes associated with reflux.
    • Methylene blue offers a visible marker for assessing tissue exposure and potential damage.

    Purpose:

    • To establish a reproducible animal model for studying gastroesophageal reflux disease.
    • To investigate the immediate effects of induced reflux on esophageal electromotor activity.
    • To evaluate the utility of methylene blue as a marker in a GERD model.

    Summary:

    • A gastroesophageal reflux disease model was created in rats by administering 1% methylene blue solution to the stomach fundus.
    • Esophageal electromotor activity in the lower third was monitored within 1-5 minutes post-administration.
    • Visible mucosa staining indicated the extent of refluxate spread.

    Impact:

    • This model provides a new tool for GERD research, enabling real-time observation of esophageal responses.
    • It facilitates the study of reflux mechanisms and the efficacy of potential treatments.
    • The use of methylene blue allows for direct visualization of mucosal involvement in reflux events.