Objective: to analyze the leading causes of early (first two days) and late (after the second day) hospital mortality among of patients with acute decompensated heart failure.Materials and methods: a retrospective single-center cohort (n=718) of patients with acute decompensated heart failure.Results: predictors of prognosis for early hospital mortality were pulmonary edema, hepatomegaly, the need for inotropic and vasopressive drugs, the level of systolic blood pressure and creatinine. Predictors of prognosis for late hospital mortality were pulmonary edema, the need for inotropic drugs, community-acquired pneumonia, and laboratory markers of acute renal injury.Conclusion: Tactical approaches are proposed to reduce hospital mortality of patients with acute decompensated heart failure.