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Abstract Purpose Acute decompensated heart failure (ADHF) patients with a poor renal function have a worse prognosis. The urea-to-creatinine ratio (UCR) may be a valuable tool for assessing kidney function and stratifying patients with ADHF. We evaluated the value of an admission and follow-up UCR in predicting AKI, 28-day mortality, and rehospitalization in patients with ADHF. Methods This prospective research comprised sixty patients with ADHF. Based on the mean admission UCR, patients are classified into two groups: the high UCR group (UCR ≥ 42.33) and the low UCR group (UCR 34.85 (p

Background: Recent research has shown that the blood urea/creatinine ratio (BUN/Cr) rather than BUN or Cr alone can predict the prognosis of individuals with acute heart failure (AHF). The objective of this study was to estimate the urea-to creatinine serum ratio (BUN/Cr) in patients with acute decompensated heart failure (ADHF) and correlate the results with patient outcome, length of hospitalization, and mortality., Results: Sixty ADHF patients were included and categorized into four groups; Group I: non-AKI with low BUN/Cr (n = 25); Group II: non-AKI with high BUN/Cr (n = 5); Group III: AKI with low BUN/Cr (n = 14); Group IV: AKI with high BUN/Cr (n = 16). Regarding urea and BUN levels, the first reading showed a considerable rise in urea and BUN levels in groups III and IV compared to group 1 and in group IV compared to groups I and III. Similar results were recorded in the second and third readings. Regarding the BUN/Cr ratio, the three readings revealed a significant elevation in group IV compared to groups I and II and in group IV compared to group III. Mortality was significantly higher in group IV compared to group I. Additionally, MACE was significantly more frequent in group IV compared to groups I and III. Multivariable logistic regression analysis revealed that hypertension, creatinine, and BUN were independent predictors of AKI., Conclusions: BUN/Cr may predict prognosis in AHF patients since AHF with an elevated BUN/Cr is associated with a higher death rate., (© 2023. Egyptian Society of Cardiology.)