Endoscopic Treatment of Gastroesophageal Reflux Disease

Gastroesophageal reflux disease (GERD) occurs when stomach acid repeatedly flows back into the tube connecting your mouth and stomach (esophagus). This backwash (acid reflux) can irritate the inner lining of the esophagus. This is a particular problem after surgery to reduce obesity called gastric sleeve resection. The goal of this small clinical trial is to examine the effect of endoscopic treatment of GERD by mucosal band ligation. The main questions it aims to answer are: * Does the treatment affect gastroesophageal reflux assessed by measuring gastroesophageal reflux * Does the treatment affect gastroesophageal reflux symptoms and ability to stop treatment with medication commonly used (proton pump inhibitors) Participants (n=12) will be asked to undergo 24 h reflux examination and report symptoms of GERD. Suitable patients will be offered endoscopic treatment with band ligation of the inner lining of the lower esophagus and upper part of the stomach. The effects will be assessed three and six months after the procedure.