Pharmacologic management of chronic heart failure (HF) is primarily determined by the patient’s left ventricular ejection fraction (LVEF) and severity of symptoms. Patients with chronic HF who have an LVEF ≤40% are considered to have heart failure with reduced ejection fraction (HFrEF) and those with an LVEF ≥50% are considered to have heart failure with preserved ejection fraction (HFpEF). Patients with an LVEF of 41-49% have heart failure with mildly reduced or mid-range ejection fraction.