Heart failure contributes to morbidity and mortality and costs to the health system. The main source of care is the emergency department, where scales have been devised for clinical conduct, such as the MEESSI-AHF, which is intended to assess 30-day mortality. To date, there are no studies that show the behavior of this scale in our population. We included patients with a diagnosis of heart failure in the emergency department between 2021 and 2022, for whom the MEESSI-AHF scale was calculated, evaluating the mortality obtained withthe predicted mortality and calculating the goodness of fit. A total of 267 patients were analyzed, mostly women, with a mean age of 79 years. The mortality observed in the studied population was higher than expected in the groups of low risk (5.69% vs2.1%), intermediate risk (19.37% vs 7.6%), and high risk (50% vs 20.1%), but with adequate performance in the first risk quintile; The goodness of fit test of the model was adequate with an area under the curve of 0.9306 95% (CI: 0.8922-0.969). When applying the MEESSI-AHF scale, we found a higher mortality than expected by risk group.Therefore, it must be a support tool, clinical behavior must be supported by institutional protocols and individual clinical judgment, until additional studies or regional scales are carried out.
