Achalasia is a primary esophageal disorder involving the body of the esophagus and lower esophageal sphincter affecting equally both genders and all ages. While its etiology remains unclear, the pathophysiologic mechanism involves the destruction of the myenteric plexi responsible for esophageal peristalsis. Given the slow, initially oligosymptomatic progression and relative low prevalence of d...

BACKGROUND/AIMS The motility change after peroral endoscopic myotomy (POEM) in achalasia is currently focused on lower esophageal sphincter (LES). This study aims to investigate the correlation of motility response between distal and proximal esophagus after POEM. METHODS A total of 32 achalasia patients who received POEM and high-resolution manometry (HRM) were included for analysis. Eckardt...

Proton pump inhibitors reduce gastric acid secretion and are commonly utilized in the management of gastroesophageal reflux disease across all ages. Yet a decrease in lower esophageal sphincter tone has been reported in vitro in rats through an unknown mechanism; however, their effect on the gastroesophageal muscle tone early in life was never studied. Hypothesizing that proton pump inhibitors ...

The distal 2/3 of the opossum esophagus contains only smooth muscle. Manometry shows that the most distal 1-2 cm is the lower esophageal sphincter. We used a variety of agonists to seek differences between circular muscle from the sphincteric segment and more rostral levels. Isometric contractions of strips from the distal 6 cm were recorded in vitro in response to acetylcholine, carbachol, met...

TO THE EDITOR: We greatly appreciate the insight provided by Wang et al 1 regarding their recent review of the esophageal disorders not assessed by the Chicago classification of motility disorders of the esophagus. This is an important issue as many people still fail to understand that the Chicago classification was designed to describe and categorize distal esophageal motor disorders focused o...