The investigators wish to monitor the adoption of a new, incisionless approach to performing a Heller myotomy for the surgical treatment of achalasia. The method, the Peroral Endoscopic Myotomy (POEM), will provide less-invasive treatment for esophageal achalasia, ideally providing similar if not better outcomes (safety and efficacy) as the Heller myotomy. The investigators hope to enroll 10 patients with a clinical diagnosis of achalasia who meet inclusion criteria.