Heartburn is a burning sensation in the chest that can extend to the neck, throat, and face; it is worsened by bending or lying down. It is the primary symptom of gastroesophageal reflux, which is the movement of stomach acid into the esophagus. On rare occasions, it is due to gastritis (stomach lining inflammation).
More than one-third of the population is afflicted by heartburn, with about one-tenth afflicted daily. Infrequent heartburn is usually without serious consequences, but chronic or frequent heartburn (recurring more than twice per week) can have severe consequences. Accordingly, early management is important.
Understanding heartburn depends on understanding the structure and action of the esophagus. The esophagus is a tube connecting the throat to the stomach. It is about 10 in. (25 cm) long in adults, lined with squamous (plate-like) epithelial cells, coated with mucus, and surrounded by muscles that push food to the stomach by sequential waves of contraction (peristalsis). The lower esophageal sphincter (LES) is a thick band of muscles that encircles the esophagus just above the uppermost part of the stomach. This sphincter is usually tightly closed and normally opens only when food passes from the esophagus into the stomach. Thus, the contents of the stomach are normally kept from moving back into the esophagus.
The stomach has a thick mucous coating that protects it from the strong acid it secretes into its interior when food is present, but the much thinner esophageal coating does not provide protection against acid. Thus, if the LES opens inappropriately or fails to close completely, and stomach contents leak into the esophagus, the esophagus can be burned by acid. The resulting burning sensation is called heartburn.
Occasional heartburn has no serious long-lasting effects, but repeated episodes of gastroesophageal reflux can ultimately lead to esophageal inflammation (esophagitis) and other damage. If episodes occur more frequently than twice a week, and the esophagus is repeatedly subjected to acid and digestive enzymes from the stomach, ulcerations, scarring, and thickening of the esophagus walls can result. This thickening of the esophageal wall causes a narrowing of the interior of the esophagus. Such narrowing affects swallowing and peristaltic movements. Repeated irritation can also result in changes in the types of cells that line the esophagus. The condition associated with these changes is called Barrett's syndrome and can lead to esophageal cancer.
A number of different factors may contribute to LES malfunction with its consequent gastroesophageal acid reflux:
Heartburn itself is a symptom. Other symptoms also caused by gastroesophageal reflux can be associated with heartburn. Often heartburn sufferers salivate excessively or regurgitate stomach contents into their mouths, leaving a sour or bitter taste. Frequent gastroesophageal reflux leads to additional complications, including difficult or painful swallowing, sore throat, hoarseness, coughing, laryngitis, wheezing, asthma, pneumonia, gingivitis, bad breath, and earache.
Gastroenterologists and internists are best equipped to diagnose and treat gastroesophageal reflux. Diagnosis is usually based solely on patient histories that report heartburn and other related symptoms. Additional diagnostic procedures can confirm the diagnosis and assess damage to the esophagus, as well as monitor healing progress. The following diagnostic procedures are appropriate for anyone who has frequent, chronic, or difficult-to-treat heartburn or any of the complicating symptoms.
X-rays taken after a patient swallows a barium suspension can reveal esophageal narrowing, ulcerations, or a reflux episode as it occurs. However, this procedure cannot detect the structural changes associated with different degrees of esophagitis. This diagnostic procedure has traditionally been called an “upper GI series” or “barium swallow” and costs about $250.00.
Esophagoscopy is a newer procedure that uses a thin flexible tube to view the inside of the esophagus directly. It should be done by a gastroenterologist or gastrointestinal endoscopist and costs about $700. It gives an accurate picture of any damage present and gives the physician the ability to distinguish between different degrees of esophagitis.
Other tests may also be used. They include pressure measurements of the LES; measurements of esophageal acidity (pH), usually throughout a 24-hour period; and microscopic examination of biopsied tissue from the esophageal wall (to inspect esophageal cell structure for Barrett's syndrome and malignancies).
Newer technology allows for continuous monitoring of pH levels to help determine the cause. A tiny wireless capsule can be delivered to the lining of the esophagus through a catheter and a data recorder on a device the size of a pager is clipped to the patient's belt or purse for 48 hours. The capsule eventually sloughs off and passes harmlessly through the gastrointestinal tract in seven to ten days.
Note: A burning sensation in the chest is usually heartburn and is not associated with the heart. However, chest pain that radiates into the arms and is not accompanied by regurgitation is a warning of a possible serious heart problem. Anyone with these symptoms should contact a doctor immediately.
Occasional heartburn is probably best treated with over-the-counter antacids. These products go straight to the esophagus and immediately begin to decrease acidity. However, they should not be used as the sole treatment for heartburn sufferers who either have two or more episodes per week or who suffer for periods of more than three weeks. There is a risk of kidney damage and other metabolic changes.
H2 blockers (histamine receptor blockers, such as Pepcid AC, Zantac, Tagamet) decrease stomach acid production and are effective against heartburn. H2 blocker treatment also allows healing of esophageal damage but is not very effective when there is a high degree of damage. It takes 30–45 minutes for these drugs to take effect, so they must be taken prior to an episode. Thus, they should be taken daily, usually two to four times per day for several weeks. Six to twelve weeks of standard-dose treatment relieves symptoms in about one-half of patients. Higher doses relieve symptoms in a greater fraction of the population, but at least 25% of heartburn sufferers are not helped by H2 blockers.
Proton-pump inhibitors also inhibit acid production by the stomach, but are much more effective than H2 blockers for some people. They are also more effective in aiding the healing process. Esophagitis is healed in about 90% of patients undergoing protonpump inhibitor treatment.
The long-term effects of inhibiting stomach acid production are unknown. Without the antiseptic effects of a consistently acidic stomach environment, users of H2 blockers or proton-pump inhibitors may become more susceptible to bacterial and viral infection. Absorption of some drugs is also lowered by this less acidic environment.
Prokinetic agents (also known as motility drugs) act on the LES, stimulating it to close more tightly, thereby keeping stomach contents out of the esophagus. It is not known how effectively these drugs promote healing. Some of the early motility drugs had serious neurological side effects, but a newer drug, cisapride, seems to act only on digestive system nerve connections.
Fundoplication, a surgical procedure to increase pressure on the LES by stretching and wrapping the upper part of the stomach around the sphincter, is a treatment of last resort. About 10% of heartburn sufferers undergo this procedure. It is not always effective and its effectiveness may decrease over time, especially several years after surgery. Dr. Robert Marks and his colleagues at the University of Alabama reported in 1997 on the long-term outcome of this procedure. They found that 64% of the patients in their study who had fundoplication between 1992 and 1995 still suffered from heartburn and reported an impaired quality of life after the surgery.
However, laparoscopy (an examination of the interior of the abdomen by means of the laparoscope) now provides hope for better outcomes. Fundoplication performed with a laparoscope is less invasive. Five small incisions are required instead of one large incision. Patients recover faster, and it is likely that studies will show they suffer from fewer surgical complications.
Prevention, as outlined below, is a primary feature for heartburn management in alternative medicine and traditional medicine. Dietary adjustments can eliminate many causes of heartburn.
Herbal remedies include bananas, aloe vera gel, chamomile (Matricaria recutita), ginger (Zingiber officinale), and citrus juices, but there is little agreement here. For example, ginger, which seems to help some people, is claimed by other practitioners to cause heartburn and is thought to relax the LES. There are also many recommendations to avoid citrus juices, which are themselves acidic. Licorice (Glycyrrhiza uralensis) can help relieve the symptoms of heartburn by reestablishing balance in the acid output of the stomach.
Sodium bicarbonate (baking soda) is an inexpensive alternative to an antacid. It reduces esophageal acidity immediately, but its effect is not long-lasting and should not be used by people on sodium-restricted diets.
The prognosis for people who get heartburn only occasionally or people without esophageal damage is excellent. The prognosis for people with esophageal damage who become involved in a treatment program that promotes healing is also excellent. The prognosis for anyone with esophageal cancer is very poor. There is a strong likelihood of a painful illness and a less than 5% chance of surviving more than five years.
Given the lack of completely satisfactory treatments for heartburn or its consequences and the lack of a cure for esophageal cancer, prevention is of the utmost importance. Proponents of traditional and alternative medicine agree that people disposed to heartburn should:
Preventing heartburn's progression to cancer begins with preventing heartburn in the first place. A study in Great Britain in 2004 also looked at using a combination of aspirin and an anti-ulcer drug to try to prevent Barrett's esophagus from forming in patients with longterm heartburn. Aspirin has been found in previous studies to reduce cases of esophageal cancer. However, since one of its side effects is an increased risk of stomach ulcers, the researchers included an effective anti-ulcer drug for participants.
See also Gastroesophageal reflux disease(GERD) ; Omega-3 and omega-6 fatty acids ; Ulcers .
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American College of Gastroenterology (ACG), PO Box 3099, Alexandria, VA, 22302, (800) HRT-BURN (478-2876), https://gi.org .
American Gastroenterological Association, 4930 Del Ray Ave., Bethesda, MD, 20814, (301) 654-2055, Fax: (301) 654-5920, email@example.com, http://www.gastro.org .
American Society for Gastrointestinal Endoscopy, 1520 Kensington Rd., Ste. 202, Oak Brook, IL, 60523, (866) 353-2743, http://www.asge.org .
International Foundation for Functional Gastrointestinal Disorders, PO Box 170864, Milwaukee, WI, 53217, (414) 964-1799, (888) 964-2001, Fax: (414) 964-7176, firstname.lastname@example.org, http://www.iffgd.org .
National Digestive Diseases Information Clearinghouse, 2 Information Way, Bethesda, MD, 20892–3570, (800) 891–5389, TTY: (866) 569–1162, Fax: (703) 738–4929, email@example.com, http://www.digestive.niddk.nih.gov .
Lorraine Lica, PhD
Revised by Teresa G. Odle