LCN2 and acute kidney injury: NGAL is notonly a sensitive marker of AKI but also a prognostic marker of AHF [13, 14, 17, 18, 19, 20].However, the prognostic value of NGAL in patients with AHF is inconsistent [21].Owing to the limited number of clinical studies and nometa-analyses, we conducted ameta-analysis of theprognostic role of serum NGAL levels in patients with AHF.