<h4>Aims</h4>Clinical features and outcomes in the novel phenotype heart failure with mid-range ejection fraction [HFmrEF, ejection fraction (EF) 40-49%] were compared with heart failure with reduced EF (HFrEF, EF <40%) and preserved EF (HFpEF, EF ≥50%).<h4>Methods and results</h4>In the Swedish Hea...
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