Gastroesophageal reflux disease | |
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Other names | British: Gastro-oesophageal reflux disease (GORD); [1] gastric reflux disease, acid reflux disease, reflux, gastroesophageal reflux |
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] |
Duration | Long term [6] [7] |
Causes | Inadequate 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] |
Treatment | Lifestyle changes, medications, surgery [6] |
Medication | Antacids, H2 receptor blockers, proton pump inhibitors, prokinetics [6] [9] |
Frequency | ~15% (North American and European populations) [9] |
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Gastroesophageal reflux disease (GERD) or gastro-oesophageal reflux disease (GORD) is a chronic upper gastrointestinal disease 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]
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]
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]
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]
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]
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]
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]
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, 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 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
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]
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 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]
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 (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]
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]
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]
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]
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 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]
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]
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]
A number of endoscopic devices have been tested to treat chronic heartburn.
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.
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.
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 of its potential to further transition to esophageal adenocarcinoma, an often-deadly cancer.
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.
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.
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.
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.
Esophageal spasm is a disorder of motility of the esophagus.
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 (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.
Laryngopharyngeal reflux (LPR) or laryngopharyngeal reflux disease (LPRD) 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.
Impedance–pH monitoring is a technique used in the diagnosis of gastroesophageal reflux disease (GERD), by monitoring both impedance and pH.
In gastroenterology, 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.
Esophageal intramucosal pseudodiverticulosis (EIPD) is a rare condition wherein the esophagus wall develops numerous small outpouchings (pseudodiverticulae). Individuals with the condition typically develop difficulty swallowing. The outpouchings represent the ducts of the 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 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.
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.
Gastro-oesophageal reflux disease (GORD) is defined as 'gastrooesophageal reflux' associated with complications including oesophagitis...