<unk>  is a surgical procedure in which the muscles of the cardia (lower esophageal sphincter or LES) are cut, allowing food and liquids to pass to the stomach. It is used to treat achalasia, a disorder in which the lower esophageal sphincter fails to relax properly, making it difficult for food and liquids to reach the stomach.
Heller myotomy
Septal myectomy
Hassab's decongestion operation
Stretta procedure
Nissen fundoplication
Transoral incisionless fundoplication
Per-oral endoscopic myotomy
SILS gastric banding