American Registry of Ambulatory or Acutely Decompensated Heart Failure

Inclusion Criteria: * Patient aged 18 years or older and one of the following: * Hospitalized patient with admission diagnosis of acutely decompensated heart failure or * Outpatient with confirmed diagnosis (main or complementary) of heart failure Exclusion Criteria: * Hospitalized patient with principal diagnosis of another cardiovascular / non-cardiovascular pathology and who develops an acute decompensation of heart failure during hospitalization. * Patient on heart transplant waiting list * Patient who has implanted or is in process of implanting a long-term ventricular assist device (eg, Heart Mate II, Heart Mate III) as a target therapy or bridge therapy to other therapies * Patient in whom palliative management has been previously defined for his/her cardiac condition (i.e. Heart failure) or for another associated medical condition (cancer, chronic obstructive pulmonary disease (COPD), etc.) * Patient who is discharged or referred to another institution within 48 hours of hospital stay * Inability to comply with programmed follow-ups (telephone or in person) due to social, personal or other conditions considered by the principal investigator * Life expectancy less than 6 months given a condition other than heart failure (Cancer, COPD, etc.)