"GERD" redirects here. For other uses, see Gerd.
| Gastroesophageal reflux disease |
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| Synonyms |
Gastro-oesophageal reflux disease (GORD),[1] gastric reflux disease, acid reflux disease, reflux, gastroesophageal reflux |
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X-ray showing radiocontrast from the stomach entering the esophagus due to severe reflux |
| Pronunciation |
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| Specialty |
Gastroenterology |
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| Symptoms |
Taste of acid, heartburn, bad breath, chest pain, breathing problems[5] |
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| Complications |
Esophagitis, esophageal strictures, Barrett's esophagus[5] |
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| Duration |
Long term[5][6] |
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| Causes |
Poor closure of the lower esophageal sphincter[5] |
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| Risk factors |
Obesity, pregnancy, smoking, hiatus hernia, taking certain medicines[5] |
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| Diagnostic method |
Gastroscopy, upper GI series, esophageal pH monitoring, esophageal manometry[5] |
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| Differential diagnosis |
Peptic ulcer disease, esophageal cancer, esophageal spasm, angina[7] |
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| Treatment |
Lifestyle changes, medications, surgery[5] |
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| Medication |
Antacids, H2 receptor blockers, proton pump inhibitors, prokinetics[5][8] |
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| Frequency |
~15% (Western populations)[8] |
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Gastroesophageal reflux disease (GERD), also known as acid reflux, is a long-term condition where stomach contents come back up into the esophagus resulting in either symptoms or complications.[5][6] Symptoms include the taste of acid in the back of the mouth, heartburn, bad breath, chest pain, vomiting, breathing problems, and wearing away of the teeth.[5] Complications include esophagitis, esophageal strictures, and Barrett's esophagus.[5]
Risk factors include obesity, pregnancy, smoking, hiatus hernia, and taking certain medicines.[5] Medications involved include antihistamines, calcium channel blockers, antidepressants, and sleeping medication.[5] It is due to poor closure of the lower esophageal sphincter (the junction between the stomach and the esophagus).[5] Diagnosis among those who do not improve with simpler measures may involve gastroscopy, upper GI series, esophageal pH monitoring, or esophageal manometry.[5]
Treatment is typically via lifestyle changes, medications, and sometimes surgery.[5] Lifestyle changes may include not lying down for three hours after eating, losing weight, avoiding certain foods, and stopping smoking.[5] Medications include antacids, H2 receptor blockers, proton pump inhibitors, and prokinetics.[5][8] Surgery may be an option in those who do not improve with other measures.[5]
In the Western world, between 10 and 20% of the population are affected by GERD.[8] Gastroesophageal reflux (GER) once in a while, without significant symptoms or complications, is more common.[5] The condition was first described in 1935 by the American gastroenterologist Asher Winkelstein.[9] The classic symptoms had been described earlier in 1925.[10]
Signs and symptoms
Adults
The most common symptoms of GERD in adults are an acidic taste in the mouth, regurgitation, and heartburn.[11] Less common symptoms include pain with swallowing/sore throat, increased salivation (also known as water brash), nausea,[12] chest pain, and coughing.
GERD sometimes causes injury of the esophagus. These injuries may include one or more of the following:
- Reflux esophagitis – inflammation of esophageal epithelium which can cause ulcers near the junction of the stomach and esophagus
- Esophageal strictures – the persistent narrowing of the esophagus caused by reflux-induced inflammation
- Barrett's esophagus – intestinal metaplasia (changes of the epithelial cells from squamous to intestinal columnar epithelium) of the distal esophagus[13]
- Esophageal adenocarcinoma – a form of cancer[12]
Some researchers have proposed that recurrent ear infections,[14] and idiopathic pulmonary fibrosis[15] might be tied, in some cases, to GERD; however, a causative role has not been established.[not in citation given] GERD does not appear to be linked to chronic sinusitis.[16]
Children
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'.[17] One theory for this is the "fourth trimester theory" which notes most animals are born with significant mobility, but humans are relatively helpless at birth, and suggests there may have once been a fourth trimester, but children began to be born earlier, evolutionarily, to accommodate the development of larger heads and brains and allow them to pass through the birth canal and this leaves them with partially undeveloped digestive systems.[citation needed]
Most children will outgrow their reflux by their first birthday. However, a small but significant number of them will not outgrow the condition. This is particularly true when a family history of GERD is present.[citation needed]
Barrett's esophagus
Main article: Barrett's esophagus
GERD may lead to Barrett's esophagus, a type of intestinal metaplasia,[13] 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 about 20% of cases.[18] 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.[19]
Causes
A comparison of a healthy condition to GERD
GERD is caused by a failure of the lower esophageal sphincter. In healthy patients, the "Angle of His"—the angle at which the esophagus enters the stomach—creates a valve that prevents duodenal bile, enzymes, and stomach acid from traveling back into the esophagus where they can cause burning and inflammation of sensitive esophageal tissue.
Factors that can contribute to GERD:
- Hiatal hernia, which increases the likelihood of GERD due to mechanical and motility factors.[20][21]
- Obesity: increasing body mass index is associated with more severe GERD.[22] In a large series of 2,000 patients with symptomatic reflux disease, it has been shown that 13% of changes in esophageal acid exposure is attributable to changes in body mass index.[23]
- Zollinger-Ellison syndrome, which can be present with increased gastric acidity due to gastrin production.
- A high blood calcium level, which can increase gastrin production, leading to increased acidity.
- Scleroderma and systemic sclerosis, which can feature esophageal dysmotility.
- The use of medicines such as prednisolone.
- Visceroptosis or Glénard syndrome, in which the stomach has sunk in the abdomen upsetting the motility and acid secretion of the stomach.
GERD has been linked to a variety of respiratory and laryngeal complaints such as laryngitis, chronic cough, pulmonary fibrosis, earache, and asthma, even when not clinically apparent. These atypical manifestations of GERD are commonly referred to as laryngopharyngeal reflux (LPR) or as extraesophageal reflux disease (EERD).
Factors that have been linked with GERD, but not conclusively:
- Obstructive sleep apnea[24][25]
- Gallstones, which can impede the flow of bile into the duodenum, which can affect the ability to neutralize gastric acid
In 1999, a review of existing studies found that, on average, 40% of GERD patients also had H. pylori infection.[26] The eradication of H. pylori can lead to an increase in acid secretion,[27] leading to the question of whether H. pylori-infected GERD patients are any different than 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.[28]
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.
The diagnosis of GERD is usually made when typical symptoms are present.[29] Reflux can be present in people without symptoms and the diagnosis requires both symptoms or complications and reflux of stomach content.[30]
Other investigations may include esophagogastroduodenoscopy (EGD). Barium swallow X-rays should not be used for diagnosis.[29] Esophageal manometry is not recommended for use in diagnosis, being recommended only prior to surgery.[29] 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.[29] Investigation for H. pylori is not usually needed.[29]
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-hr pH monitoring results among patients with symptoms suggestive of GERD.[31]
Endoscopy
Endoscopy, the looking down into the stomach with a fibre-optic scope, is not routinely needed if the case is typical and responds to treatment.[29] 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.[29] 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.[32]
Biopsies performed during gastroscopy may show:
- Edema and basal hyperplasia (nonspecific inflammatory changes)
- Lymphocytic inflammation (nonspecific)
- Neutrophilic inflammation (usually due to reflux or Helicobacter gastritis)
- Eosinophilic inflammation (usually due to reflux): The presence of intraepithelial eosinophils may suggest a diagnosis of eosinophilic esophagitis (EE) if eosinophils are present in high enough numbers. Less than 20 eosinophils per high-power microscopic field in the distal esophagus, in the presence of other histologic features of GERD, is more consistent with GERD than EE.[33]
- Goblet cell intestinal metaplasia or Barrett's esophagus
- Elongation of the papillae
- Thinning of the squamous cell layer
- Dysplasia
- Carcinoma
Reflux changes may not be erosive in nature, leading to "nonerosive reflux disease".
Severity
Severity may be documented with the Johnson-DeMeester's scoring system:[citation needed]
0 - None
1 - Minimal - occasional episodes
2 - Moderate - medical therapy visits
3 - Severe - interfere with daily activities
Differential diagnosis
Other causes of chest pain such as heart disease should be ruled out before making the diagnosis.[29] 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.
Treatment
The treatments for GERD include lifestyle modifications, medications, and possibly surgery. Initial treatment is frequently with a proton-pump inhibitor such as omeprazole.[29]
Lifestyle
Certain foods and lifestyle are considered to promote gastroesophageal reflux, but most dietary interventions have little supporting evidence.[34] Some evidence suggests that reduced sugar intake and increased fiber intake can help.[35] Avoidance of specific foods and of eating before lying down should be recommended only to those in which they are associated with the symptoms.[30] Foods that have been implicated include coffee, alcohol, chocolate, fatty foods, acidic foods, and spicy foods.[30] Weight loss and elevating the head of the bed are generally useful.[36] A wedge pillow that elevates the head may inhibit gastroesophageal reflux during sleep.[37] Stopping smoking and not drinking alcohol do not appear to result in significant improvement in symptoms.[36] Although moderate exercise may improve symptoms in people with GERD, vigorous exercise may worsen them.[34]
Medications
Main article: Drugs for acid-related disorders
The primary medications used for GERD are proton-pump inhibitors, H2 receptor blockers and antacids with or without alginic acid.[8]
Proton-pump inhibitors (PPIs), such as omeprazole, are the most effective, followed by H2 receptor blockers, such as ranitidine.[30] If a once daily PPI is only partially effective they may be used twice a day.[30] They should be taken one half to one hour before a meal.[29] There is no significant difference between PPIs.[29] When these medications are used long term, the lowest effective dose should be taken.[30] They may also be taken only when symptoms occur in those with frequent problems.[29] H2 receptor blockers lead to roughly a 40% improvement.[38]
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 60% (NNT=4).[38] Metoclopramide (a prokinetic) is not recommended either alone or in combination with other treatments due to concerns around adverse effects.[8][30] The benefit of the prokinetic mosapride is modest.[8]
Sucralfate has a similar effectiveness to H2 receptor blockers; however, sucralfate needs to be taken multiple times a day, thus limiting its use.[8] 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.[8]
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.[39] It is recommended only for those who do not improve with PPIs.[29] Quality of life is improved in the short term compared to medical therapy, but there is uncertainty in the benefits over surgery versus long-term medical management with proton pump inhibitors.[40] When comparing different fundoplication techniques, partial posterior fundoplication surgery is more effective than partial anterior fundoplication surgery,[41] and partial fundoplication has better outcomes than total fundoplication.[42]
In 2012 the 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.[43] 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.[44]
In those with symptoms that do not improve with PPIs surgery known as transoral incisionless fundoplication may help.[45] Benefits may last for up to six years.[46]
Pregnancy
In pregnancy, dietary modifications and lifestyle changes may be attempted, but often have little effect. Calcium-based antacids are recommended if these changes are not effective. Aluminum- and magnesium-based antacids are also safe, as is ranitidine[47] and PPIs.[29]
Infants
Infants may see relief with changes in feeding techniques, such as smaller, more frequent feedings, changes in position during feedings, or more frequent burping during feedings.[48] They may also be treated with medicines such as ranitidine or proton pump inhibitors.[49] Proton pump inhibitors however have not been found to be effective in this population and there is a lack of evidence for safety.[50]
Overtreatment
The use of acid suppression therapy is a common response to GERD symptoms and many patients get more of this kind of treatment than their individual case merits.[51] The overuse of this treatment is a problem because of the side effects and costs which the patient will have from undergoing unnecessary therapy, and patients should not take more treatment than they need.[51]
In some cases, a person with GERD symptoms can manage them by taking over-the-counter drugs and making lifestyle changes.[52] This is often safer and less expensive than taking prescription drugs.[52] Some guidelines recommend trying to treat symptoms with an H2 antagonist before using a proton-pump inhibitor because of cost and safety concerns.[52]
Epidemiology
In Western populations, GERD affects approximately 10% to 20% of the population and 0.4% newly develop the condition.[8] For instance, an estimated 3.4 million to 6.8 million Canadians are GERD sufferers. 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.[53] In the United States 20% of people have symptoms in a given week and 7% every day.[8] No data support sex predominance with regard to GERD.
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.
Research
A number of endoscopic devices have been tested to treat chronic heartburn.
- Endocinch, puts stitches in the lower esophogeal sphincter (LES) to create small pleats to help strengthen the muscle. However, long-term results were disappointing, and the device is no longer sold by Bard.[54]
- Stretta procedure, uses electrodes to apply radio-frequency energy to the LES. A 2015 systematic review and meta-analysis in response to the systematic review (no meta-analysis) conducted by SAGES did not support the claims that Stretta was an effective treatment for GERD.[55] A 2012 systematic review found that it improves GERD symptoms.[56]
- NDO Surgical Plicator creates a plication, or fold, of tissue near the gastroesophageal junction, and fixates the plication with a suture-based implant. The company ceased operations in mid-2008, and the device is no longer on the market.
- Transoral incisionless fundoplication, which uses a device called Esophyx, may be effective.[57]
See also
- Esophageal motility disorder
- Esophageal motility study
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- ^ van der Pol RJ, Smits MJ, van Wijk MP, Omari TI, Tabbers MM, Benninga MA (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.
- ^ a b Here is a plain English explanation, followed by specific studies.
- Consumer Reports; Drug Effectiveness Review Project (May 2010), "Drugs to Treat Heartburn and Stomach Acid Reflux: The Proton Pump Inhibitors - Comparing Effectiveness, Safety, and Price" (PDF), Best Buy Drugs, Consumer Reports, p. 6, archived (PDF) from the original on 2 December 2012, retrieved 27 March 2013
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- Nardino RJ, Vender RJ, Herbert PN (2000). "Overuse of acid-suppressive therapy in hospitalized patients1". The American Journal of Gastroenterology. 95 (11): 3118–3122. doi:10.1111/j.1572-0241.2000.03259.x. PMID 11095327.
- 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.
- 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.
- McKay AB, Wall D (2008). "Overprescribing PPIs: An old problem". BMJ. 336 (7636): 109. doi:10.1136/bmj.39458.462338.3A. PMC 2206261 . PMID 18202040.
- ^ a b c
- Consumer Reports; Drug Effectiveness Review Project (May 2010), "Drugs to Treat Heartburn and Stomach Acid Reflux: The Proton Pump Inhibitors - Comparing Effectiveness, Safety, and Price" (PDF), Best Buy Drugs, Consumer Reports, p. 6, archived (PDF) from the original on 2 December 2012, retrieved 27 March 2013
- 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.
- 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.
- ^ 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. PMC 2918483 . PMID 20652158. Lay summary.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
External links
| Classification |
D - ICD-10: K21
- ICD-9-CM: 530.81
- OMIM: 109350
- MeSH: D005764
- DiseasesDB: 23596
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| External resources |
- MedlinePlus: 000265
- eMedicine: med/857 ped/1177 radio/300
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- Gastroesophageal reflux disease at Curlie (based on DMOZ)
- Kahrilas PJ, Shaheen NJ, Vaezi MF, Hiltz SW, Black E, Modlin IM, Johnson SP, Allen J, Brill JV (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. Lay summary.
- Lichtenstein DR, Cash BD, Davila R, Baron TH, Adler DG, Anderson MA, Dominitz JA, Gan SI, Harrison ME, Ikenberry SO, Qureshi WA, Rajan E, Shen B, Zuckerman MJ, Fanelli RD, VanGuilder T (August 2007). "Role of endoscopy in the management of GERD". Gastrointestinal Endoscopy. 66 (2): 219–24. doi:10.1016/j.gie.2007.05.027. PMID 17643692. Lay summary.
- Hirano I, Richter JE (March 2007). "ACG practice guidelines: esophageal reflux testing" (PDF). Am J Gastroenterol. 102 (3): 668–85. doi:10.1111/j.1572-0241.2006.00936.x. PMID 17335450.