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Pyrosis

Heartburn or pyrosis is a painful or burning sensation in the esophagus, just below the breastbone caused by regurgitation of gastric acid. The pain often rises in the chest and may radiate to the neck or throat. more...

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Medicines

Heartburn is also identified as one of the causes of asthma and chronic cough.

Pathophysiology

The sensation of heartburn is caused by exposure of the lower esophagus to the acidic contents of the stomach. Normally, the lower esophageal sphincter (LES) separating the stomach from the esophagus is supposed to contract to prevent this situation. If the sphincter relaxes for any reason (as normally occurs during swallowing), stomach contents, mixed with gastric acid, can return into the esophagus. This return is also known as reflux, and may progress to gastroesophageal reflux disease (GERD) if it occurs frequently. Peristalsis, the rhythmic wave of muscular contraction in the esophagus, normally moves food down and past the LES and is responsible for ultimately clearing refluxed stomach contents. In addition, gastric acid can be neutralized by buffers present in saliva.

Causes

Foods that may cause Heartburn:

  • Alcohol
  • Coffee, tea, cola, and other caffeinated and carbonated beverages
  • Chocolate
  • Citrus fruits and juices
  • Tomatoes and tomato sauces (such as pizza and pasta sauce)
  • Spicy foods and fatty foods (including full-fat dairy products)
  • Peppermint and spearmint
  • Dry fruits such as peanuts

Diagnosis

Physicians typically diagnose gastroesophageal reflux disease (GERD) based on symptoms alone. When the clinical presentation is unclear, other tests can be performed to confirm the diagnosis or exclude other disorders. Confirmatory tests include:

Ambulatory pH Monitoring

A probe can be placed via the nose into the esophagus to record the level of acidity in the lower esophagus. Because some degree of variation in acidity is normal, and small reflux events are relatively common, such monitors must be left in place for at least a 24-hour period to confirm the diagnosis of GERD. The test is particularly useful when the patient's symptoms can be correlated to episodes of increased esophageal acidity.

Upper Gastrointestinal (GI) Series

A series of x-rays of the upper digestive system are taken after drinking a barium solution. These can demonstrate reflux of barium into the esophagus, which suggests the possibility of gastroesophageal reflux disease. More accurately, fluoroscopy can be used to document reflux in real-time.

Manometry

In this test, a pressure sensor (manometer) is passed through the mouth into the esophagus and measures the pressure of the lower esophageal sphincter directly.

Endoscopy

The esophageal mucosa can be visualized directly by passing a thin, lighted tube with a tiny camera attached (an endoscope) through the mouth to examine the esophagus and stomach. In this way, evidence of esophageal inflammation can be detected, and biopsies taken if necessary.

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