Treatment of achalasia when the Heller operation has failed.
D004106:Dilatation; D004931:Esophageal Achalasia / Q000601:surgery / Q000628:therapy*; D004941:Esophagitis / Q000209:etiology; D006801:Humans; D008722:Methods; D011183:Postoperative Complications; D013997:Time Factors