
A Unique Esophageal Motor Pattern That Involves Longitudinal Muscles Is Responsible for Emptying in Achalasia Esophagus
Keywords: Esophageal Longitudinal Muscle Contraction; Lower Esophageal Sphincter; Esophagogastric Junction Achalasia; Ultrasound Imaging Esophagus; CSA; cross-sectional area; EGJ; esophagogastric junction; HFIUS; high-frequency intraluminal ultrasound; HRM; high-re