Abstract
Selective circular myotomy involving the internal circular muscular fibers and preserving the longitudinal outer muscular fibers was proposed for the treatment of achalasia. However, completeness of myotomy is a prerequisite for the excellent long-term result of conventional surgical myotomy. Our study aims to compare the efficacy and safety of full-thickness peroral endoscopic myotomy (POEM) and circular myotomy for the patients with severe achalasia (Patients with Eckardt ≥6, esophgageal diameter ≥6 or sigmoid-type esophagus).
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