OPTIMA-HF is an observational, cross-sectional, multicenter, real-life study conducted in two different clinical settings: HF outpatients' clinics of Italian University Hospitals and territorial Cardiology outpatients' services. Aim of the Optimization of Therapy in the Italian Management of Heart Failure \[OpTIMa-HF\] Registry is to collect data on HF patients followed in different Italian outpatients' settings to describe the current Italian population of HF patients, in terms of demographic characteristics and disease features, with a specific focus on guideline-directed medical therapy (GDMT) prescription, assessing its improvement after educational activities. In the present analysis we report the baseline data on the general enrolled population with a specific focus on HFrEF treatment adherence and prescription rates, according to the most recent European Guidelines.