A Peroral Endoscopic Myotomy was performed on the patient with the persistent dysphagia despite preceding Heller myotomy combined with partial fundoplication, relaparotomy, fundoplication wrap reconstruction, gastrostomy and left-sided thoracoscopy with the drainage of the thoracic abscess. The use of intraoperative High-Resolution Manometry during Endoscopic Peroral Myotomy helped to reveal the reasons for the failure of previous treatment and to address the dysphagia.