rapid swallow (MRS) can assess the contractile reserve capacity of the oesophageal body and identify and diagnose oesophageal motility disorders, but the impact of preoperative oesophageal reserve capacity on postoperative symptoms and motility in patients with GERD remains unclear. The aim of this study was to assess the effect of pre-operative oesophageal reserve capacity on post-reflux symptoms and motility in patients with GERD by using a high-resolution oesophageal manometry-based provocation test, MRS, to track pre-operative ineffective oesophageal motility (IEM).