When food doesn't move down the esophagus
Normally, a person’s esophagus performs a wave of sequenced contractions, called peristalsis, to move food from the throat to the stomach. When peristalsis is impaired, the most common diagnosis is achalasia. It is a rare disorder in which the lower esophageal sphincter (LES), a ringed muscle that acts as a valve between the esophagus and...
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