Gastroesophageal reflux disease

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Gastroesophageal reflux disease
Other namesBritish: Gastro-oesophageal reflux disease (GORD); [1] gastric reflux disease, acid reflux disease, reflux, gastroesophageal reflux
Gastroesophageal reflux barium X-ray.jpg
X-ray showing radiocontrast from the stomach (white material below diaphragm) entering the esophagus (three vertical collections of white material in the mid-line of the chest) due to severe reflux
Pronunciation
Specialty Gastroenterology
Symptoms Taste of acid, heartburn, bad breath, chest pain, breathing problems [6]
Complications Esophagitis, esophageal strictures, Barrett's esophagus [6]
DurationLong term [6] [7]
CausesInadequate closure of the lower esophageal sphincter [6]
Risk factors Obesity, pregnancy, smoking, hiatal hernia, taking certain medicines [6]
Diagnostic method Gastroscopy, upper GI series, esophageal pH monitoring, esophageal manometry [6]
Differential diagnosis Peptic ulcer disease, esophageal cancer, esophageal spasm, angina [8]
TreatmentLifestyle changes, medications, surgery [6]
Medication Antacids, H2 receptor blockers, proton pump inhibitors, prokinetics [6] [9]
Frequency~15% (North American and European populations) [9]

Gastroesophageal reflux disease (GERD) or gastro-oesophageal reflux disease (GORD) is one of the upper gastrointestinal chronic diseases in which stomach content persistently and regularly flows up into the esophagus, resulting in symptoms and/or complications. [6] [7] [10] Symptoms include dental corrosion, dysphagia, heartburn, odynophagia, regurgitation, non-cardiac chest pain, extraesophageal symptoms such as chronic cough, hoarseness, reflux-induced laryngitis, or asthma. [10] In the long term, and when not treated, complications such as esophagitis, esophageal stricture, and Barrett's esophagus may arise. [6]

Contents

Risk factors include obesity, pregnancy, smoking, hiatal hernia, and taking certain medications. Medications that may cause or worsen the disease include benzodiazepines, calcium channel blockers, tricyclic antidepressants, NSAIDs, and certain asthma medicines. Acid reflux is due to poor closure of the lower esophageal sphincter, which is at the junction between the stomach and the esophagus. Diagnosis among those who do not improve with simpler measures may involve gastroscopy, upper GI series, esophageal pH monitoring, or esophageal manometry. [6]

Treatment options include lifestyle changes, medications, and sometimes surgery for those who do not improve with the first two measures. Lifestyle changes include not lying down for three hours after eating, lying down on the left side, raising the pillow or bedhead height, losing weight, and stopping smoking. [6] [11] Foods that may precipitate GERD symptoms include coffee, alcohol, chocolate, fatty foods, acidic foods, and spicy foods. [12] Medications include antacids, H2 receptor blockers, proton pump inhibitors, and prokinetics. [6] [9]

In the Western world, between 10 and 20% of the population is affected by GERD. [9] It is highly prevalent in North America with 18% to 28% of the population suffering from the condition. [13] Occasional gastroesophageal reflux without troublesome symptoms or complications is even more common. [6] The classic symptoms of GERD were first described in 1925, when Friedenwald and Feldman commented on heartburn and its possible relationship to a hiatal hernia. [14] In 1934 gastroenterologist Asher Winkelstein described reflux and attributed the symptoms to stomach acid. [15]

Signs and symptoms

Adults

The most common symptoms of GERD in adults are an acidic taste in the mouth, regurgitation, and heartburn. [16] Less common symptoms include pain with swallowing/sore throat, increased salivation (also known as water brash), nausea, [17] chest pain, coughing, and globus sensation. [18] The acid reflux can induce asthma attack symptoms like shortness of breath, cough, and wheezing in those with underlying asthma. [18]

GERD sometimes causes injury to the esophagus. These injuries may include one or more of the following:

GERD sometimes causes injury of the larynx (LPR). [21] [22] Other complications can include aspiration pneumonia. [23]

Children and babies

GERD may be difficult to detect in infants and children since they cannot describe what they are feeling and indicators must be observed. Symptoms may vary from typical adult symptoms. GERD in children may cause repeated vomiting, effortless spitting up, coughing, and other respiratory problems, such as wheezing. Inconsolable crying, refusing food, crying for food and then pulling off the bottle or breast only to cry for it again, failure to gain adequate weight, bad breath, and burping are also common. Children may have one symptom or many; no single symptom is universal in all children with GERD.

Of the estimated 4 million babies born in the US each year, up to 35% of them may have difficulties with reflux in the first few months of their lives, known as 'spitting up'. [24] About 90% of infants will outgrow their reflux by their first birthday. [25]

Mouth

Frontal view of severe tooth erosion in GERD GERD 1.png
Frontal view of severe tooth erosion in GERD
Severe tooth erosion in GERD GERD 2.png
Severe tooth erosion in GERD

Acid reflux into the mouth can cause breakdown of the enamel, especially on the inside surface of the teeth. A dry mouth, acid or burning sensation in the mouth, bad breath and redness of the palate may occur. [27] Less common symptoms of GERD include difficulty in swallowing, water brash, chronic cough, hoarse voice, nausea and vomiting. [26]

Signs of enamel erosion are the appearance of a smooth, silky-glazed, sometimes dull, enamel surface with the absence of perikymata, together with intact enamel along the gum margin. [28] It will be evident in people with restorations as tooth structure typically dissolves much faster than the restorative material, causing it to seem as if it "stands above" the surrounding tooth structure. [29]

Barrett's esophagus

GERD may lead to Barrett's esophagus, a type of intestinal metaplasia, [20] which is in turn a precursor condition for esophageal cancer. The risk of progression from Barrett's to dysplasia is uncertain, but is estimated at 20% of cases. [30] Due to the risk of chronic heartburn progressing to Barrett's, EGD every five years is recommended for people with chronic heartburn, or who take drugs for chronic GERD. [31]

Causes

A comparison of a healthy condition to GERD GERD.png
A comparison of a healthy condition to GERD

A small amount of acid reflux is typical even in healthy people (as with infrequent and minor heartburn), but gastroesophageal reflux becomes gastroesophageal reflux disease when signs and symptoms develop into a recurrent problem. Frequent acid reflux is due to poor closure of the lower esophageal sphincter, which is at the junction between the stomach and the esophagus. [6]

Factors that can contribute to GERD:

Factors that have been linked with GERD, but not conclusively:

In 1999, a review of existing studies found that, on average, 40% of GERD patients also had H. pylori infection. [39] The eradication of H. pylori can lead to an increase in acid secretion, [40] leading to the question of whether H. pylori-infected GERD patients are any different from non-infected GERD patients. A double-blind study, reported in 2004, found no clinically significant difference between these two types of patients with regard to the subjective or objective measures of disease severity. [41]

Diagnosis

Endoscopic image of peptic stricture, or narrowing of the esophagus near the junction with the stomach: This is a complication of chronic gastroesophageal reflux disease and can be a cause of dysphagia or difficulty swallowing. Peptic stricture.png
Endoscopic image of peptic stricture, or narrowing of the esophagus near the junction with the stomach: This is a complication of chronic gastroesophageal reflux disease and can be a cause of dysphagia or difficulty swallowing.

The diagnosis of GERD is usually made when typical symptoms are present. [42] Reflux can be present in people without symptoms and the diagnosis requires both symptoms or complications and reflux of stomach content. [43]

Other investigations may include esophagogastroduodenoscopy (EGD). Barium swallow X-rays should not be used for diagnosis. [42] Esophageal manometry is not recommended for use in the diagnosis, being recommended only prior to surgery. [42] Ambulatory esophageal pH monitoring may be useful in those who do not improve after PPIs and is not needed in those in whom Barrett's esophagus is seen. [42] Investigation for H. pylori is not usually needed. [42]

The current gold standard for diagnosis of GERD is esophageal pH monitoring. It is the most objective test to diagnose the reflux disease and allows monitoring GERD patients in their response to medical or surgical treatment. One practice for diagnosis of GERD is a short-term treatment with proton-pump inhibitors, with improvement in symptoms suggesting a positive diagnosis. Short-term treatment with proton-pump inhibitors may help predict abnormal 24-hour pH monitoring results among patients with symptoms suggestive of GERD. [44]

Endoscopy

Endoscopy, the examination of the stomach with a fibre-optic scope, is not routinely needed if the case is typical and responds to treatment. [42] It is recommended when people either do not respond well to treatment or have alarm symptoms, including dysphagia, anemia, blood in the stool (detected chemically), wheezing, weight loss, or voice changes. [42] Some physicians advocate either once-in-a-lifetime or 5- to 10-yearly endoscopy for people with longstanding GERD, to evaluate the possible presence of dysplasia or Barrett's esophagus. [45]

Biopsies performed during gastroscopy may show:

Reflux changes that are not erosive in nature lead to "nonerosive reflux disease".

Severity

Severity may be documented with the Johnson-DeMeester's scoring system: [47] 0 – None 1 – Minimal – occasional episodes 2 – Moderate – medical therapy visits 3 – Severe – interference with daily activities

Differential diagnosis

Other causes of chest pain such as heart disease should be ruled out before making the diagnosis. [42] Another kind of acid reflux, which causes respiratory and laryngeal signs and symptoms, is called laryngopharyngeal reflux (LPR) or extraesophageal reflux disease (EERD). Unlike GERD, LPR rarely produces heartburn, and is sometimes called silent reflux. [48] Differential diagnosis of GERD can also include dyspepsia, peptic ulcer disease, esophageal and gastric cancer, and food allergies. [49]

Treatment

The treatments for GERD may include food choices, lifestyle changes, medications, and possibly surgery. Initial treatment is frequently with a proton-pump inhibitor such as omeprazole. [42] In some cases, a person with GERD symptoms can manage them by taking over-the-counter drugs. [50] [51] [52] This is often safer and less expensive than taking prescription drugs. [50] Some guidelines recommend trying to treat symptoms with an H2 antagonist before using a proton-pump inhibitor because of cost and safety concerns. [50]

Medical nutrition therapy and lifestyle changes

Medical nutrition therapy plays an essential role in managing the symptoms of the disease by preventing reflux, preventing pain and irritation, and decreasing gastric secretions. [10]

Some foods such as chocolate, mint, high-fat food, and alcohol have been shown to relax the lower esophageal sphincter, increasing the risk of reflux. [10] Weight loss is recommended for the overweight or obese, as well as avoidance of bedtime snacks or lying down immediately after meals (meals should occur at least 2–3 hours before bedtime), elevation of the head of the bed on 6-inch blocks, avoidance of smoking, and avoidance of tight clothing that increases pressure in the stomach. It may be beneficial to avoid spices, citrus juices, tomatoes and soft drinks, and to consume small frequent meals and drink liquids between meals. [43] [10] [53] Some evidence suggests that reduced sugar intake and increased fiber intake can help. [54] [43] Although moderate exercise may improve symptoms in people with GERD, vigorous exercise may worsen them. [55] Breathing exercises may relieve GERD symptoms. [56]

Medications

The primary medications used for GERD are proton-pump inhibitors, H2 receptor blockers and antacids with or without alginic acid. [9] The use of acid suppression therapy is a common response to GERD symptoms and many people get more of this kind of treatment than their case merits. [50] [57] [58] [52] [51] [59] The overuse of acid suppression is a problem because of the side effects and costs. [50] [58] [52] [51] [59]

Proton-pump inhibitors

Proton-pump inhibitors (PPIs), such as omeprazole, are the most effective, followed by H2 receptor blockers, such as ranitidine. [43] If a once-daily PPI is only partially effective they may be used twice a day. [43] They should be taken one half to one hour before a meal. [42] There is no significant difference between PPIs. [42] When these medications are used long-term, the lowest effective dose should be taken. [43] They may also be taken only when symptoms occur in those with frequent problems. [42] H2 receptor blockers lead to roughly a 40% improvement. [60]

Antacids

The evidence for antacids is weaker with a benefit of about 10% (NNT=13) while a combination of an antacid and alginic acid (such as Gaviscon) may improve symptoms by 60% (NNT=4). [60] Metoclopramide (a prokinetic) is not recommended either alone or in combination with other treatments due to concerns around adverse effects. [9] [43] The benefit of the prokinetic mosapride is modest. [9]

Other agents

Sucralfate has similar effectiveness to H2 receptor blockers; however, sucralfate needs to be taken multiple times a day, thus limiting its use. [9] Baclofen, an agonist of the GABAB receptor, while effective, has similar issues of needing frequent dosing in addition to greater adverse effects compared to other medications. [9]

Surgery

The standard surgical treatment for severe GERD is the Nissen fundoplication. In this procedure, the upper part of the stomach is wrapped around the lower esophageal sphincter to strengthen the sphincter and prevent acid reflux and to repair a hiatal hernia. [61] It is recommended only for those who do not improve with PPIs. [42] Quality of life is improved in the short term compared to medical therapy, but there is uncertainty in the benefits of surgery versus long-term medical management with proton pump inhibitors. [62] When comparing different fundoplication techniques, partial posterior fundoplication surgery is more effective than partial anterior fundoplication surgery, [63] and partial fundoplication has better outcomes than total fundoplication. [64]

Esophagogastric dissociation is an alternative procedure that is sometimes used to treat neurologically impaired children with GERD. [65] [66] Preliminary studies have shown it may have a lower failure rate [67] and a lower incidence of recurrent reflux. [66]

In 2012 the U.S. Food and Drug Administration (FDA) approved a device called the LINX, which consists of a series of metal beads with magnetic cores that are placed surgically around the lower esophageal sphincter, for those with severe symptoms that do not respond to other treatments. Improvement of GERD symptoms is similar to those of the Nissen fundoplication, although there is no data regarding long-term effects. Compared to Nissen fundoplication procedures, the procedure has shown a reduction in complications such as gas bloat syndrome that commonly occur. [68] Adverse responses include difficulty swallowing, chest pain, vomiting, and nausea. Contraindications that would advise against use of the device are patients who are or may be allergic to titanium, stainless steel, nickel, or ferrous iron materials. A warning advises that the device should not be used by patients who could be exposed to, or undergo, magnetic resonance imaging (MRI) because of serious injury to the patient and damage to the device. [69]

Some patients who are at an increased surgical risk or do not tolerate PPIs [70] may qualify for a more recently developed incisionless procedure known as a TIF transoral incisionless fundoplication. [71] Benefits of this procedure may last for up to six years. [72]

Special populations

Pregnancy

GERD is a common condition that develops during pregnancy, but usually resolves after delivery. [73] The severity of symptoms tend to increase throughout the pregnancy. [73] In pregnancy, dietary modifications and lifestyle changes may be attempted, but often have little effect. Some lifestyle changes that can be implemented are elevating the head of the bed, eating small portions of food at regularly scheduled intervals, reduce fluid intake with a meal, avoid eating three hours before bedtime, and refrain from lying down after eating. [73] Calcium-based antacids are recommended if these changes are not effective; aluminum- and magnesium hydroxide-based antacids are also safe. [73] Antacids that contain sodium bicarbonate or magnesium trisilicate should be avoided in pregnancy. [73] Sucralfate has been studied in pregnancy and proven to be safe [73] as is ranitidine [74] and PPIs. [75]

Babies

Babies may see relief with smaller, more frequent feedings, more frequent burping during feedings, holding the baby in an upright position 30 minutes after feeding, keeping the baby's head elevated while laying on the back, removing milk and soy from the mother's diet or feeding the baby milk protein-free formula. [76] They may also be treated with medicines such as ranitidine or proton pump inhibitors. [77] Proton pump inhibitors, however, have not been found to be effective in this population and there is a lack of evidence for safety. [78] The role of an occupational therapist with an infant with GERD includes positioning during and after feeding. [79] One technique used is called the log-roll technique, which is practiced when changing an infant's clothing or diapers. [79] Placing an infant on their back while having their legs lifted is not recommended since it causes the acid to flow back up the esophagus. [79] Instead, the occupational therapist would suggest rolling the child on the side, keeping the shoulders and hips aligned to avoid acid rising up the baby's esophagus. [79] Another technique used is feeding the baby on their side with an upright position instead of lying flat on their back. [79] The final positioning technique used for infants is to keep them on their stomach or upright for 20 minutes after feeding. [79] [80]

Epidemiology

In Western populations, GERD affects approximately 10% to 20% of the population and 0.4% newly develop the condition. [9] For instance, an estimated 3.4 million to 6.8 million Canadians have GERD. The prevalence rate of GERD in developed nations is also tightly linked with age, with adults aged 60 to 70 being the most commonly affected. [81] In the United States 20% of people have symptoms in a given week and 7% every day. [9] No data supports sex predominance with regard to GERD. [82]

History

An obsolete treatment is vagotomy ("highly selective vagotomy"), the surgical removal of vagus nerve branches that innervate the stomach lining. This treatment has been largely replaced by medication. Vagotomy by itself tended to worsen contraction of the pyloric sphincter of the stomach, and delayed stomach emptying. Historically, vagotomy was combined with pyloroplasty or gastroenterostomy to counter this problem. [83]

Research

A number of endoscopic devices have been tested to treat chronic heartburn.

See also

Related Research Articles

<span class="mw-page-title-main">Proton-pump inhibitor</span> Class of drugs for reducing stomach acid

Proton-pump inhibitors (PPIs) are a class of medications that cause a profound and prolonged reduction of stomach acid production. They do so by irreversibly inhibiting the stomach's H+/K+ ATPase proton pump.

<span class="mw-page-title-main">Esophageal achalasia</span> Rare, incurable, progressive motility disorder due to failure of esophogeal motor neurons

Esophageal achalasia, often referred to simply as achalasia, is a failure of smooth muscle fibers to relax, which can cause the lower esophageal sphincter to remain closed. Without a modifier, "achalasia" usually refers to achalasia of the esophagus. Achalasia can happen at various points along the gastrointestinal tract; achalasia of the rectum, for instance, may occur in Hirschsprung's disease. The lower esophageal sphincter is a muscle between the esophagus and stomach that opens when food comes in. It closes to avoid stomach acids from coming back up. A fully understood cause to the disease is unknown, as are factors that increase the risk of its appearance. Suggestions of a genetically transmittable form of achalasia exist, but this is neither fully understood, nor agreed upon.

Heartburn, also known as pyrosis, cardialgia or acid indigestion, is a burning sensation in the central chest or upper central abdomen. Heartburn is usually due to regurgitation of gastric acid into the esophagus. It is the major symptom of gastroesophageal reflux disease (GERD).

An esophageal motility disorder (EMD) is any medical disorder resulting from dysfunction of the coordinated movement of esophagus, which causes dysphagia.

<span class="mw-page-title-main">Barrett's esophagus</span> Medical condition

Barrett's esophagus is a condition in which there is an abnormal (metaplastic) change in the mucosal cells lining the lower portion of the esophagus, from stratified squamous epithelium to simple columnar epithelium with interspersed goblet cells that are normally present only in the small intestine and large intestine. This change is considered to be a premalignant condition because it is associated with a high incidence of further transition to esophageal adenocarcinoma, an often-deadly cancer.

<span class="mw-page-title-main">Esophagitis</span> Medical condition

Esophagitis, also spelled oesophagitis, is a disease characterized by inflammation of the esophagus. The esophagus is a tube composed of a mucosal lining, and longitudinal and circular smooth muscle fibers. It connects the pharynx to the stomach; swallowed food and liquids normally pass through it.

<span class="mw-page-title-main">Hiatal hernia</span> Type of hernia

A hiatal hernia or hiatus hernia is a type of hernia in which abdominal organs slip through the diaphragm into the middle compartment of the chest. This may result in gastroesophageal reflux disease (GERD) or laryngopharyngeal reflux (LPR) with symptoms such as a taste of acid in the back of the mouth or heartburn. Other symptoms may include trouble swallowing and chest pains. Complications may include iron deficiency anemia, volvulus, or bowel obstruction.

Coffee ground vomitus refers to a particular appearance of vomit. Within organic heme molecules of red blood cells is the element iron, which oxidizes following exposure to gastric acid. This reaction causes the vomitus to look like ground coffee.

<span class="mw-page-title-main">Nissen fundoplication</span> Surgical procedure to treat gastric reflux and hiatal hernia

A Nissen fundoplication, or laparoscopic Nissen fundoplication when performed via laparoscopic surgery, is a surgical procedure to treat gastroesophageal reflux disease (GERD) and hiatal hernia. In GERD, it is usually performed when medical therapy has failed; but, with a Type II (paraesophageal) hiatus hernia, it is the first-line procedure. The Nissen fundoplication is total (360°), but partial fundoplications known as Thal, Belsey, Dor, Lind, and Toupet fundoplications are alternative procedures with somewhat different indications and outcomes.

Indigestion, also known as dyspepsia or upset stomach, is a condition of impaired digestion. Symptoms may include upper abdominal fullness, heartburn, nausea, belching, or upper abdominal pain. People may also experience feeling full earlier than expected when eating. Indigestion is relatively common, affecting 20% of people at some point during their life, and is frequently caused by gastroesophageal reflux disease (GERD) or gastritis.

<span class="mw-page-title-main">Eosinophilic esophagitis</span> Allergic inflammatory condition of the esophagus

Eosinophilic esophagitis (EoE) is an allergic inflammatory condition of the esophagus that involves eosinophils, a type of white blood cell. In healthy individuals, the esophagus is typically devoid of eosinophils. In EoE, eosinophils migrate to the esophagus in large numbers. When a trigger food is eaten, the eosinophils contribute to tissue damage and inflammation. Symptoms include swallowing difficulty, food impaction, vomiting, and heartburn.

Stretta is a minimally invasive endoscopic procedure for the treatment of gastroesophageal reflux disease (GERD) that delivers radiofrequency energy in the form of electromagnetic waves through electrodes at the end of a catheter to the lower esophageal sphincter (LES) and the gastric cardia – the region of the stomach just below the LES. The energy heats the tissue, ultimately causing it to swell and stiffen; the way this works was not understood as of 2015, but it was thought that perhaps the heat causes local inflammation, collagen deposition and muscular thickening of the LES and that it may disrupt the nerves there.

<span class="mw-page-title-main">Nutcracker esophagus</span> Medical condition

Nutcracker esophagus, jackhammer esophagus, or hypercontractile peristalsis, is a disorder of the movement of the esophagus characterized by contractions in the smooth muscle of the esophagus in a normal sequence but at an excessive amplitude or duration. Nutcracker esophagus is one of several motility disorders of the esophagus, including achalasia and diffuse esophageal spasm. It causes difficulty swallowing, or dysphagia, with both solid and liquid foods, and can cause significant chest pain; it may also be asymptomatic. Nutcracker esophagus can affect people of any age but is more common in the sixth and seventh decades of life.

<span class="mw-page-title-main">Laryngopharyngeal reflux</span> Medical condition

Laryngopharyngeal reflux (LPR) is the retrograde flow of gastric contents into the larynx, oropharynx and/or the nasopharynx. LPR causes respiratory symptoms such as cough and wheezing and is often associated with head and neck complaints such as dysphonia, globus pharyngis, and dysphagia. LPR may play a role in other diseases, such as sinusitis, otitis media, and rhinitis, and can be a comorbidity of asthma. While LPR is commonly used interchangeably with gastroesophageal reflux disease (GERD), it presents with a different pathophysiology.

<span class="mw-page-title-main">Impedance–pH monitoring</span>

Impedance–pH monitoring is a technique used in the diagnosis of gastroesophageal reflux disease (GERD), by monitoring both impedance and pH.

<span class="mw-page-title-main">Esophageal pH monitoring</span>

Esophageal pH monitoring is the current gold standard for diagnosis of gastroesophageal reflux disease (GERD). It provides direct physiologic measurement of acid in the esophagus and is the most objective method to document reflux disease, assess the severity of the disease and monitor the response of the disease to medical or surgical treatment. It can also be used in diagnosing laryngopharyngeal reflux.

<span class="mw-page-title-main">Esophageal intramural pseudodiverticulosis</span> Medical condition

Esophageal intramucosal pseudodiverticulosis (EIPD) is a rare condition wherein the wall of the esophagus develops numerous small outpouchings (pseudodiverticulae). Individuals with the condition typically develop difficulty swallowing. The outpouchings represent the ducts of submucosal glands of the esophagus. It typically affects individuals in their sixth and seventh decades of life. While it is associated with certain chronic conditions, particularly alcoholism, diabetes and gastroesophageal reflux disease, the cause of the condition is unknown. Treatment involves medications to treat concomitant conditions such as reflux and esophageal spasm, and dilation of strictures in the esophagus.

Transoral incisionless fundoplication (TIF) is an endoscope treatment designed to relieve symptoms of gastroesophageal reflux disease (GERD). The TIF procedure, similar to Nissen fundoplication, alleviates GERD symptoms by wrapping a portion of the stomach around the esophagus.

<span class="mw-page-title-main">Acid peptic diseases</span> Overview of the acid peptic diseases of the stomach and gastrointestinal tract

Acid peptic diseases, such as peptic ulcers, Zollinger-Ellison syndrome, and gastroesophageal reflux disease, are caused by distinct but overlapping pathogenic mechanisms involving acid effects on mucosal defense. Acid reflux damages the esophageal mucosa and may also cause laryngeal tissue injury, leading to the development of pulmonary symptoms.

Esophagogastric junction outflow obstruction (EGJOO) is an esophageal motility disorder characterized by increased pressure where the esophagus connects to the stomach at the lower esophageal sphincter. EGJOO is diagnosed by esophageal manometry. However, EGJOO has a variety of etiologies; evaluating the cause of obstruction with additional testing, such as upper endoscopy, computed tomography, or endoscopic ultrasound may be necessary. When possible, treatment of EGJOO should be directed at the cause of obstruction. When no cause for obstruction is found, observation alone may be considered if symptoms are minimal. Functional EGJOO with significant or refractory symptoms may be treated with pneumatic dilation, per-oral endoscopic myotomy (POEM), or botulinum toxin injection.

References

  1. Carroll, Will (14 October 2016). Gastroenterology & Nutrition: Prepare for the MRCPCH. Key Articles from the Paediatrics & Child Health journal. Elsevier Health Sciences. p. 130. ISBN   978-0-7020-7092-1. Gastro-oesophageal reflux disease (GORD) is defined as 'gastrooesophageal reflux' associated with complications including oesophagitis...
  2. "Definition of "gastro-" - Collins American English Dictionary". Archived from the original on 8 December 2015.
  3. "Definition of "esophagus" - Collins American English Dictionary". Archived from the original on 8 December 2015.
  4. "reflux noun - Definition, pictures, pronunciation and usage notes - Oxford Advanced American Dictionary at OxfordLearnersDictionaries.com". Archived from the original on 8 December 2015.
  5. "GORD | Meaning & Definition for UK English". Lexico.com. Archived from the original on 11 February 2022. Retrieved 11 February 2022.
  6. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 "Acid Reflux (GER & GERD) in Adults". National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK). 5 November 2015. Archived from the original on 22 February 2020. Retrieved 21 February 2020.
  7. 1 2 Kahrilas PJ, Shaheen NJ, Vaezi MF (October 2008). "American Gastroenterological Association Institute technical review on the management of gastroesophageal reflux disease". Gastroenterology. 135 (4): 1392–1413, 1413.e1–5. doi: 10.1053/j.gastro.2008.08.044 . PMID   18801365.
  8. Kahan, Scott (2008). In a Page: Medicine. Lippincott Williams & Wilkins. p. 124. ISBN   978-0-7817-7035-4. Archived from the original on 8 September 2017.
  9. 1 2 3 4 5 6 7 8 9 10 11 Hershcovici T, Fass R (April 2011). "Pharmacological management of GERD: where does it stand now?". Trends in Pharmacological Sciences. 32 (4): 258–64. doi:10.1016/j.tips.2011.02.007. PMID   21429600.
  10. 1 2 3 4 5 Parker, Melinda (June 2010). "Book Review: Krause's Food and Nutrition TherapyMahanLKEscott-StumpS. Krause's Food and Nutrition Therapy. 12th ed. Philadelphia: Saunders; (2007). 1376 pp, $$149.95. ISBN: 978-1-4160-3401-8". Nutrition in Clinical Practice. 25 (3): 314. doi:10.1177/0884533610362901. ISSN   0884-5336.
  11. "Best Sleeping Position For Acid Reflux: The Gerd Sleeping Position". SleepScore. 22 April 2019. Archived from the original on 26 April 2021. Retrieved 26 April 2021.
  12. Kahrilas PJ, Shaheen NJ, Vaezi MF, et al. (October 2008). "American Gastroenterological Association Medical Position Statement on the management of gastroesophageal reflux disease". Gastroenterology. 135 (4): 1383–91, 1391.e1–5. doi: 10.1053/j.gastro.2008.08.045 . PMID   18789939.
  13. El-Serag, Hashem B; Sweet, Stephen; Winchester, Christopher C; Dent, John (June 2014). "Update on the epidemiology of gastro-oesophageal reflux disease: a systematic review". Gut. 63 (6): 871–880. doi:10.1136/gutjnl-2012-304269. ISSN   0017-5749. PMC   4046948 . PMID   23853213.
  14. Granderath, Frank Alexander; Kamolz, Thomas; Pointner, Rudolph (2006). Gastroesophageal Reflux Disease: Principles of Disease, Diagnosis, and Treatment. Springer Science & Business Media. p. 161. ISBN   978-3-211-32317-5. Archived from the original on 1 January 2020. Retrieved 28 August 2017.
  15. Arcangelo, Virginia Poole; Peterson, Andrew M. (2006). Pharmacotherapeutics for Advanced Practice: A Practical Approach. Lippincott Williams & Wilkins. p. 372. ISBN   978-0-7817-5784-3. Archived from the original on 5 January 2020. Retrieved 28 August 2017.
  16. Zajac P, Holbrook A, Super ME, et al. (March–April 2013). "An overview: Current clinical guidelines for the evaluation, diagnosis, treatment, and management of dyspepsia". Osteopathic Family Physician. 5 (2): 79–85. doi:10.1016/j.osfp.2012.10.005.
  17. 1 2 Kahrilas PJ (2008). "Gastroesophageal Reflux Disease". The New England Journal of Medicine . 359 (16): 1700–7. doi:10.1056/NEJMcp0804684. PMC   3058591 . PMID   18923172.
  18. 1 2 Clarrett, Danisa M.; Hachem, Christine (May 2018). "Gastroesophageal Reflux Disease (GERD)". Missouri Medicine. 115 (3): 214–218. ISSN   0026-6620. PMC   6140167 . PMID   30228725.
  19. "Esophagitis". The Lecturio Medical Concept Library. Archived from the original on 22 July 2021. Retrieved 22 July 2021.
  20. 1 2 Shaheen NJ, Falk GW, Iyer PG, et al. (January 2016). "ACG Clinical Guideline: Diagnosis and Management of Barrett's Esophagus". Am. J. Gastroenterol. 111 (1): 30–50, quiz 51. doi: 10.1038/ajg.2015.322 . PMC   10245082 . PMID   26526079. S2CID   2274838. Archived from the original on 7 November 2020. Retrieved 7 October 2021.
  21. Lechien JR, Saussez S, Karkos PD (December 2018). "Laryngopharyngeal reflux disease: clinical presentation, diagnosis and therapeutic challenges in 2018". Curr Opin Otolaryngol Head Neck Surg. 26 (6): 392–402. doi:10.1097/MOO.0000000000000486. PMID   30234664. S2CID   52307468.
  22. Lechien JR, Bobin F, Muls V, et al. (December 2019). "Gastroesophageal reflux in laryngopharyngeal reflux patients: Clinical features and therapeutic response". Laryngoscope. 130 (8): E479–E489. doi:10.1002/lary.28482. PMID   31876296. S2CID   209482485.
  23. Fass, R; Achem, SR; Harding, S; Mittal, RK; Quigley, E (December 2004). "Review article: supra-oesophageal manifestations of gastro-oesophageal reflux disease and the role of night-time gastro-oesophageal reflux". Alimentary Pharmacology & Therapeutics. 20 (Suppl 9): 26–38. doi: 10.1111/j.1365-2036.2004.02253.x . PMID   15527462. S2CID   23673597.
  24. "Spitting Up in Babies". familydoctor.org. Archived from the original on 8 October 2008.
  25. Maqbool, Asim; Liacouras, Chris A. (2020). "Normal Digestive Tract Phenomena". Nelson Textbook of Pediatrics (21st ed.). Philadelphia, PA. ISBN   978-0-323-52950-1.{{cite book}}: CS1 maint: location missing publisher (link)
  26. 1 2 3 Ranjitkar S, Kaidonis JA, Smales RJ (2012). "Gastroesophageal Reflux Disease and Tooth Erosion". International Journal of Dentistry. 2012: 479850. doi: 10.1155/2012/479850 . PMC   3238367 . PMID   22194748.
  27. Romano, Claudio; Cardile, Sabrina (11 August 2014). "Gastroesophageal reflux disease and oral manifestations". Italian Journal of Pediatrics. 40 (Suppl 1): A73. doi: 10.1186/1824-7288-40-S1-A73 . PMC   4132436 .
  28. Lussi A, Jaeggi T (March 2008). "Erosion--diagnosis and risk factors". Clinical Oral Investigations. 12 (Suppl 1): S5–13. doi:10.1007/s00784-007-0179-z. PMC   2238777 . PMID   18228059.
  29. Donovan T (2009). "Dental erosion". Journal of Esthetic and Restorative Dentistry. 21 (6): 359–364. doi:10.1111/j.1708-8240.2009.00291.x. PMID   20002921.
  30. and Barrett's Esophagus Archived 19 April 2015 at the Wayback Machine . Retrieved on 1 February 2009.
  31. "Patient information: Barrett's esophagus (Beyond the Basics)". June 2009. Archived from the original on 9 September 2017.
  32. Sontag SJ (1999). "Defining GERD". Yale J Biol Med. 72 (2–3): 69–80. PMC   2579007 . PMID   10780568.
  33. Piesman M, Hwang I, Maydonovitch C, et al. (October 2007). "Nocturnal reflux episodes following the administration of a standardized meal. Does timing matter?". American Journal of Gastroenterology. 102 (10): 2128–34. doi:10.1111/j.1572-0241.2007.01348.x. PMID   17573791. S2CID   11965042.
  34. Ayazi S, Crookes PF, Peyre CG, et al. (September 2007). "Objective documentation of the link between gastroesophageal reflux disease and obesity". American Journal of Gastroenterology. 102: S138–S9. doi:10.14309/00000434-200709002-00059.
  35. Ayazi S, Hagen JA, Chan LS, et al. (August 2009). "Obesity and gastroesophageal reflux: quantifying the association between body mass index, esophageal acid exposure, and lower esophageal sphincter status in a large series of patients with reflux symptoms". J. Gastrointest. Surg. 13 (8): 1440–7. doi:10.1007/s11605-009-0930-7. PMC   2710497 . PMID   19475461.
  36. Morse CA, Quan SF, Mays MZ, et al. (2004). "Is there a relationship between obstructive sleep apnea and gastroesophageal reflux disease?". Clin. Gastroenterol. Hepatol. 2 (9): 761–8. doi: 10.1016/S1542-3565(04)00347-7 . PMID   15354276.
  37. Kasasbeh A, Kasasbeh E, Krishnaswamy G (2007). "Potential mechanisms connecting asthma, esophageal reflux, and obesity/sleep apnea complex—a hypothetical review". Sleep Med Rev. 11 (1): 47–58. doi:10.1016/j.smrv.2006.05.001. PMID   17198758.
  38. Tanaja, Jasmin; Lopez, Richard A.; Meer, Jehangir M. (2022), "Cholelithiasis", StatPearls, Treasure Island (FL): StatPearls Publishing, PMID   29262107 , retrieved 30 October 2022
  39. O'Connor HJ (February 1999). "Helicobacter pylori and gastro-oesophageal reflux disease-clinical implications and management". Aliment Pharmacol Ther. 13 (2): 117–27. doi:10.1046/j.1365-2036.1999.00460.x. PMID   10102940. S2CID   41988457.
  40. El-Omar EM, Oien K, El-Nujumi A, et al. (1997). "Helicobacter pylori infection and chronic gastric acid hyposecretion". Gastroenterology. 113 (1): 15–24. doi:10.1016/S0016-5085(97)70075-1. PMID   9207257.
  41. Fallone CA, Barkun AN, Mayrand S, et al. (October 2004). "There is no difference in the disease severity of gastro-oesophageal reflux disease between patients infected and not infected with Helicobacter pylori". Aliment Pharmacol Ther. 20 (7): 761–8. doi: 10.1111/j.1365-2036.2004.02171.x . PMID   15379836. S2CID   922610.
  42. 1 2 3 4 5 6 7 8 9 10 11 12 13 Katz PO, Gerson LB, Vela MF (March 2013). "Guidelines for the diagnosis and management of gastroesophageal reflux disease". American Journal of Gastroenterology. 108 (3): 308–28. doi: 10.1038/ajg.2012.444 . PMID   23419381.
  43. 1 2 3 4 5 6 7 Kahrilas PJ, Shaheen NJ, Vaezi MF, et al. (October 2008). "American Gastroenterological Association Medical Position Statement on the management of gastroesophageal reflux disease". Gastroenterology. 135 (4): 1383–91, 1391.e1–5. doi: 10.1053/j.gastro.2008.08.045 . PMID   18789939.
  44. Numans ME, Lau J, de Wit NJ, Bonis PA (April 2004). "Short-term treatment with proton-pump inhibitors as a test for gastroesophageal reflux disease: a meta-analysis of diagnostic test characteristics". Annals of Internal Medicine. 140 (7): 518–27. doi:10.7326/0003-4819-140-7-200404060-00011. PMID   15068979. S2CID   53088422.
  45. Patient information: Barrett's esophagus, archived from the original on 9 September 2017
  46. Mills, S (ed.) 2009.Sternberg's Diagnostic Pathology. 5th Edition. ISBN   978-0-7817-7942-5
  47. Michael F. Vaezi, MD PhD MSc. "Testing for refractory gastroesophageal reflux disease" (PDF). Archived (PDF) from the original on 20 August 2018. Retrieved 20 August 2018.
  48. Stuart, Annie. "Laryngopharyngeal Reflux (Silent Reflux): Causes, Treatment, Diet, and More". WebMD. Retrieved 30 October 2022.
  49. Kellerman, Rick; Kintanar, Thomas (December 2017). "Gastroesophageal Reflux Disease". Primary Care. 44 (4): 561–573. doi:10.1016/j.pop.2017.07.001. ISSN   1558-299X. PMID   29132520.
  50. 1 2 3 4 5 Using the Proton Pump Inhibitors to Treat Heartburn and Stomach Acid Reflux (PDF) (Report). Consumer Reports Best Buy Drugs. 2013. Archived (PDF) from the original on 22 February 2020. Retrieved 21 February 2020.
  51. 1 2 3 Forgacs I, Loganayagam A (2008). "Overprescribing proton pump inhibitors". BMJ. 336 (7634): 2–3. doi:10.1136/bmj.39406.449456.BE. PMC   2174763 . PMID   18174564.
  52. 1 2 3 Heidelbaugh JJ, Kim AH, Chang R, Walker PC (2012). "Overutilization of proton-pump inhibitors: What the clinician needs to know". Therapeutic Advances in Gastroenterology. 5 (4): 219–232. doi:10.1177/1756283X12437358. PMC   3388523 . PMID   22778788.
  53. Kaltenbach T, Crockett S, Gerson LB (2006). "Are lifestyle measures effective in patients with gastroesophageal reflux disease? An evidence-based approach". Arch. Intern. Med. 166 (9): 965–71. doi: 10.1001/archinte.166.9.965 . PMID   16682569.
  54. Newberry C, Lynch K (20 July 2017). "Can We Use Diet to Effectively Treat Esophageal Disease? A Review of the Current Literature". Current Gastroenterology Reports. 19 (8): 38. doi:10.1007/s11894-017-0578-5. PMID   28730507. S2CID   39516312.
  55. Festi D, Scaioli E, Baldi F, Vestito A, Pasqui F, Di Biase AR, Colecchia A (14 April 2009). "Body weight, lifestyle, dietary habits and gastroesophageal reflux disease". World Journal of Gastroenterology. 15 (14): 1690–701. doi: 10.3748/wjg.15.1690 . PMC   2668774 . PMID   19360912.
  56. Qiu, K; Wang, J; Chen, B; Wang, H; Ma, C (March 2020). "The effect of breathing exercises on patients with GERD: a meta-analysis". Annals of Palliative Medicine. 9 (2): 405–413. doi: 10.21037/apm.2020.02.35 . PMID   32233626.
  57. Gupta R, Marshall J, Munoz JC, et al. (2013). "Decreased acid suppression therapy overuse after education and medication reconciliation". International Journal of Clinical Practice. 67 (1): 60–65. doi: 10.1111/ijcp.12046 . PMID   23241049. S2CID   37158104.
  58. 1 2 Nardino RJ, Vender RJ, Herbert PN (November 2000). "Overuse of acid-suppressive therapy in hospitalized patients". American Journal of Gastroenterology. 95 (11): 3118–22. doi:10.1016/s0002-9270(00)02052-9. PMID   11095327.
  59. 1 2 McKay AB, Wall D (2008). "Overprescribing PPIs: An old problem". BMJ. 336 (7636): 109.1–109. doi:10.1136/bmj.39458.462338.3A. PMC   2206261 . PMID   18202040.
  60. 1 2 Tran T, Lowry AM, El-Serag HB (2007). "Meta-analysis: the efficacy of over-the-counter gastro-oesophageal reflux disease drugs". Aliment Pharmacol Ther. 25 (2): 143–53. doi: 10.1111/j.1365-2036.2006.03135.x . PMID   17229239. S2CID   24358990.
  61. Abbas AE, Deschamps C, Cassivi SD, et al. (2004). "The role of laparoscopic fundoplication in Barrett's esophagus". Annals of Thoracic Surgery. 77 (2): 393–6. doi: 10.1016/S0003-4975(03)01352-3 . PMID   14759403.
  62. Garg SK, Gurusamy KS (November 2015). "Laparoscopic fundoplication surgery versus medical management for gastro-oesophageal reflux disease (GORD) in adults". Cochrane Database of Systematic Reviews. 2015 (11): CD003243. doi:10.1002/14651858.CD003243.pub3. PMC   8278567 . PMID   26544951.
  63. Kurian AA, Bhayani N, Sharata A, et al. (January 2013). "Partial anterior vs partial posterior fundoplication following transabdominal esophagocardiomyotomy for achalasia of the esophagus: meta-regression of objective postoperative gastroesophageal reflux and dysphagia". JAMA Surg. 148 (1): 85–90. doi:10.1001/jamasurgery.2013.409. PMID   23324843.
  64. Ramos RF, Lustosa SA, Almeida CA, et al. (October–December 2011). "Surgical treatment of gastroesophageal reflux disease: total or partial fundoplication? systematic review and meta-analysis". Arquivos de Gastroenterologia. 48 (4): 252–60. doi: 10.1590/s0004-28032011000400007 . PMID   22147130.
  65. Gatti C, di Abriola GF, Villa M, et al. (May 2001). "Esophagogastric dissociation versus fundoplication: Which is best for severely neurologically impaired children?". Journal of Pediatric Surgery. 36 (5): 677–680. doi:10.1053/jpsu.2001.22935. hdl: 2108/311079 . PMID   11329564.
  66. 1 2 Morabito A, Lall A, Lo Piccolo R, et al. (May 2006). "Total esophagogastric dissociation: 10 years' review". Journal of Pediatric Surgery. 41 (5): 919–922. doi:10.1016/j.jpedsurg.2006.01.013. PMID   16677883.
  67. Goyal A, Khalil B, Choo K, et al. (June 2005). "Esophagogastric dissociation in the neurologically impaired: an alternative to fundoplication?". Journal of Pediatric Surgery. 40 (6): 915–919. doi:10.1016/j.jpedsurg.2005.03.004. PMID   15991170.
  68. Badillo R, Francis D (2014). "Diagnosis and treatment of gastroesophageal reflux disease". World Journal of Gastrointestinal Pharmacology and Therapeutics. 5 (3): 105–12. doi: 10.4292/wjgpt.v5.i3.105 . PMC   4133436 . PMID   25133039.
  69. Medical Device Approvals: LINX Reflux Management System - P100049 Archived 10 November 2013 at the Wayback Machine , U.S. Food and Drug Administration, U.S. Department of Health and Human Services, Update of 17 January 2014
  70. Testoni, S, Hassan, C, Mazzoleni, G, Antonelli, G, Fanti, L, Passaretti, S, Correale, L, Cavestro, G, Testoni, P (2021). "Long-term outcomes of transoral incisionless fundoplication for gastro-esophageal reflux disease: systematic-review and meta-analysis". Endoscopy International Open. 9(2) (C2): E239–E246. doi:10.1055/a-1322-2209. PMC   7857958 . PMID   33553587.
  71. Jain D, Singhal S (March 2016). "Transoral Incisionless Fundoplication for Refractory Gastroesophageal Reflux Disease: Where Do We Stand?". Clinical Endoscopy. 49 (2): 147–56. doi:10.5946/ce.2015.044. PMC   4821522 . PMID   26878326.
  72. Hopkins J, Switzer NJ, Karmali S (25 August 2015). "Update on novel endoscopic therapies to treat gastroesophageal reflux disease: A review". World Journal of Gastrointestinal Endoscopy. 7 (11): 1039–44. doi: 10.4253/wjge.v7.i11.1039 . PMC   4549661 . PMID   26322157.
  73. 1 2 3 4 5 6 Body, Cameron; Christie, Jennifer A. (June 2016). "Gastrointestinal Diseases in Pregnancy: Nausea, Vomiting, Hyperemesis Gravidarum, Gastroesophageal Reflux Disease, Constipation, and Diarrhea". Gastroenterology Clinics of North America. 45 (2): 267–283. doi:10.1016/j.gtc.2016.02.005. ISSN   1558-1942. PMID   27261898.
  74. Mahadevan U, Kane S (July 2006). "American gastroenterological association institute medical position statement on the use of gastrointestinal medications in pregnancy". Gastroenterology. 131 (1): 278–82. doi: 10.1053/j.gastro.2006.04.048 . PMID   16831610.
  75. Katz PO, Gerson LB, Vela MF (March 2013). "Guidelines for the diagnosis and management of gastroesophageal reflux disease". American Journal of Gastroenterology. 108 (3): 308–28. doi: 10.1038/ajg.2012.444 . PMID   23419381.
  76. "Infant acid reflux - Diagnosis and treatment - Mayo Clinic". www.mayoclinic.org. Archived from the original on 14 May 2020. Retrieved 28 September 2018.
  77. Tighe MP, Afzal NA, Bevan A, Beattie RM (2009). "Current pharmacological management of gastro-esophageal reflux in children: an evidence-based systematic review". Paediatr Drugs. 11 (3): 185–202. doi:10.2165/00148581-200911030-00004. PMID   19445547. S2CID   42736509.
  78. van der Pol RJ, Smits MJ, van Wijk MP, et al. (May 2011). "Efficacy of proton-pump inhibitors in children with gastroesophageal reflux disease: a systematic review". Pediatrics. 127 (5): 925–35. doi:10.1542/peds.2010-2719. PMID   21464183. S2CID   207164814.
  79. 1 2 3 4 5 6 chantelpowellot (14 July 2014). "Helping Baby with Gastroesophageal Reflux Disorder (GERD)". Occupational Therapy Services in North County San Diego. Archived from the original on 4 May 2021. Retrieved 3 May 2021.
  80. Elser, Heather E. (2012). "Positioning after feedings: what is the evidence to reduce feeding intolerances?". Advances in Neonatal Care. 12 (3): 172–175. doi:10.1097/ANC.0b013e318256b7c1. ISSN   1536-0911. PMID   22668689.
  81. Fedorak RN, Veldhuyzen van Zanten S, Bridges R (July 2010). "Canadian Digestive Health Foundation Public Impact Series: Gastroesophageal reflux disease in Canada: Incidence, prevalence, and direct and indirect economic impact". Canadian Journal of Gastroenterology. 24 (7): 431–4. doi: 10.1155/2010/296584 . PMC   2918483 . PMID   20652158.
  82. Kim, Young Sun; Kim, Nayoung; Kim, Gwang Ha (30 October 2016). "Sex and Gender Differences in Gastroesophageal Reflux Disease". Journal of Neurogastroenterology and Motility. 22 (4): 575–588. doi:10.5056/jnm16138. ISSN   2093-0879. PMC   5056567 . PMID   27703114.
  83. HINES, JAMES R.; GEURKINK, ROBERT E.; KORNMESSER, THOMAS A.; WIKHOLM, LARRY; DAVIS, ROBERT P. (1975). "Vagotomy and Double Pyloroplasty for Peptic Ulcer". Annals of Surgery. 181 (1): 40–46. doi:10.1097/00000658-197501000-00010. ISSN   0003-4932. PMC   1343712 . PMID   1119866.
  84. Jafri SM, Arora G, Triadafilopoulos G (July 2009). "What is left of the endoscopic antireflux devices?". Current Opinion in Gastroenterology. 25 (4): 352–7. doi:10.1097/MOG.0b013e32832ad8b4. PMID   19342950. S2CID   5280924.
  85. Lipka S, Kumar A, Richter JE (June 2015). "No evidence for efficacy of radiofrequency ablation for treatment of gastroesophageal reflux disease: a systematic review and meta-analysis". Clinical Gastroenterology and Hepatology. 13 (6): 1058–67.e1. doi:10.1016/j.cgh.2014.10.013. PMID   25459556.
  86. Perry KA, Banerjee A, Melvin WS (August 2012). "Radiofrequency energy delivery to the lower esophageal sphincter reduces esophageal acid exposure and improves GERD symptoms: a systematic review and meta-analysis". Surgical Laparoscopy, Endoscopy & Percutaneous Techniques. 22 (4): 283–8. doi:10.1097/sle.0b013e3182582e92. PMID   22874675. S2CID   5813552.
  87. Testoni PA, Vailati C (August 2012). "Transoral incisionless fundoplication with EsophyX® for treatment of gastro-oesphageal reflux disease". Digestive and Liver Disease. 44 (8): 631–5. doi:10.1016/j.dld.2012.03.019. PMID   22622203.

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