Evaluation of Peroral Endoscopic Myotomy to Treat Zenker's Diverticulum

This is a multicenter investigator-initiated trial between Baylor-Scotts \& White (BSW) and Methodist Health System (MHS). This study will be conducted via a retrospective review and a prospective patient registry. Patients who have undergone the ZPOEM procedure performed by the physicians listed in this protocol will be included, as well as patients who will have this procedure in the future. Data that will be collected at MHS will be entered into an Excel spreadsheet. Patient demographic information will be collected via a review of subjects' electronic medical records. Available patient outcomes will be collected via a review of electronic medical records. This review will be conducted from 1/1/2017 through 12/31/2025.