The effect of recombinant human brain natriuretic peptide on postoperative atrial fibrillation

This study was carried out in the Affiliated Hospital of Qingdao University and was a single-center retrospective cohort study. The research protocol was approved by the research ethics committee of the Affiliated Hospital of Qingdao University, and the requirement of informed consent from participants was waived. All patient information is obtained from the scientific research big data system (Yiduyun System) of the Affiliated Hospital of Qingdao University.