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Abstract Aims The Cardiovascular Outcomes Retrospective Data analysIS in Heart Failure (CORDIS‐HF) is a single‐centre retrospective study aimed to (i) clinically characterize a real‐world population with heart failure (HF) with reduced (HFrEF) and mildly reduced ejection fraction (HFmrEF), (ii) evaluate impact of renal–metabolic comorbidities on all‐cause mortality and HF readmissions, and (iii) determine patients' eligibility for sodium–glucose cotransporter 2 inhibitors (SGLT2is). Methods and results Using a natural language processing algorithm, clinical data of patients diagnosed with HFrEF or HFmrEF were retrospectively collected from 2014 to 2018. Mortality and HF readmission events were collected during subsequent 1 and 2 year follow‐up periods. The predictive role of patients' baseline characteristics for outcomes of interest was assessed using univariate and multivariate Cox proportional hazard models. Kaplan–Meier analysis was used to determine if type 2 diabetes (T2D) and chronic kidney disease (CKD) impacted mortality and HF readmission rates. The European SGLT2i label criteria were used to assess patients' eligibility. The CORDIS‐HF included 1333 HF patients with left ventricular ejection fraction (LVEF)