To describe the causes mentioned by general practitioners, explaining the under-treatment of the three main treatments for heart failure with impaired ejection fraction (ARS blockers of the type ACEinhibitor/ARA2/ARNi, ß- and/or anti-aldosterone).

Inclusion Criteria:

• Patients with a previous diagnosis of heart failure with impaired ejection fraction (LVEF < 40%)
• Under 85 years of age
• Admitted to an Emergency department for cardiac decompensation
• Hospitalized following this decompensation
• Not deceased within one month of hospitalisation
• Whose sum of the doses of ACEI or ARB2 + BB + aldosterone antagonist is less than 50% of the dose required for this patient* (definition in annex)
• Who did not object within one month of being informed

Exclusion Criteria:- Patient objecting to the use of their data

• Patient who is a minor
• Patient who does not have a general practitioner

Heart failure patients with impaired ejection fraction (LVEF < 40%), under 85 years of age, admitted to the emergency department for cardiac decompensation and hospitalised in the aftermath of this decompensation, for whom the sum of the doses of ACE inhibitor or ARB2 + BB + aldosterone antagonist is less than 50% of the dose required for this patient