
Keywords: GER، ریفلاکس معده; EGJ, esophagogastric junction; GC myotomy, esophagocardiomyotomy in the greater curvature; GER, gastroesophageal reflux; LC myotomy, esophagocardiomyotomy in the lesser curvature; LES, lower esophageal sphincter; POEM, per-oral endoscopic myotomy