Prognostic value of blood urea nitrogen–creatinine ratio for rehospitalization and outcomes in myocardial infarction: a four-year retrospective cohort analysis

BACKGROUND: Risk stratification in acute myocardial infarction (AMI) remains a critical challenge in clinical practice. Traditional prognostic markers often require complex or costly assessments, underscoring the need for simple, accessible indicators. This study, conducted with the aim of evaluating the relationship between the blood urea nitrogen (BUN) and creatinine (Cr) ratio and rehospitalization following AMI. METHODS: This retrospective cohort study, conducted at a single center, patients diagnosed with AMI. BUN and Cr levels at the time of initial admission were collected to calculate the BUN/Cr ratio, which was categorized into two groups: ≤16.23 and >16.23. Statistical analyses were carried out using IBM SPSS software (version 22). RESULTS: < 0.05). CONCLUSION: While rehospitalization rates over a four‑year period were slightly higher among those with elevated ratios, the difference was not statistically significant. However, patients with a BUN/Cr ratio >16.23 demonstrated markedly increased rates of major adverse cardiac events (MACE) compared to those with lower ratios.