<prompt> Heller myotomy is used in:Esophageal atresiaAchalasiaGERDNone of the above  <response>: A laparoscopic Heller myotomy and paial fundoplication is the procedure of choice for esophageal achalasia. The operation consists of a controlled division of the muscle fibers ie, a myotomy of the lower esophagus 5 cm and proximal stomach 2 cm, followed by a paial fundoplication to prevent reflux. 