Abstract
Gastroesophageal reflux occurs due to an incompetent lower esophageal sphincter (LES) associated with hiatus hernia, spontaneous relaxations of the lower esophageal sphincter, and gastric distension. Increased esophageal peristalsis has been observed in association with acid reflux. This may be related to the presence of a bolus or the acid itself in the esophagus causing increased esophageal motor activity and secondary peristalsis, or the presence of the noxious stimulus of acid may stimulate salivation that in turn causes voluntary swallows and primary peristalsis.
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