Despite its known prevalence in Heart Failure, a recent study conducted by Prof. Cacoub (unpublished) on the French national health insurance database showed that iron deficiency was a poorly diagnosed and poorly treated comorbidity. In chronic diseases including Heart Failure, Transferrin Saturation Factor is only performed in about 10% of cases while it is recommended for patients with Heart Failure (French Health High Authority 2011). The purpose of this study is to obtain current data on the prevalence of iron deficiency in France in patients with Heart Failure, applying the recommendations of European Society of Cardiology and French Health High Authority (determination of ferritinemia and Transferrin Saturation Factor).

Inclusion Criteria:

• Patient, male or female, over 18 years of age
• Patient present at the hospital on the day of the study
• Diagnosis of Heart Failure (acute or chronic) regardless of left ventricular ejection fraction (LVEF)
• Patient with signed consent

Exclusion Criteria:

• Protected patient: major under guardianship, tutorship or other legal protection, deprived of liberty by judicial or administrative decision
• Pregnant or breastfeeding woman