Heartburn Wikipedia

Q.I have seen so many definitions about heartburn. However, I don't completely trust them because they are written by non professionals in medicine I know that Wikipedia has a very trustworthy definition about this. I am trying to fulfill my assignment at the Havard medical School about the effects of heartburn on women So can anyone in the group show out the definition at wikipedia of heartburn for me please? .

A.Heartburn or pyrosis is a painful or burning sensation in the esophagus, just below the breastbone caused by regurgitation of gastric acid. [1] The pain often rises in the chest and may radiate to the neck, throat, or angle of the jaw. Heartburn is also identified as one of the causes of asthma and chronic cough. Heartburn actually has nothing to do with the heart; it is so called because of a burning sensation of the breastbone, although some heart problems have a similar sensation to heartburn 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.

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