- Patients with chronic heart failure of New York Heart Association Class II or III, a left ventricular ejection fraction of ≤ 40% for patients in NYHA class II or ≤ 45% for patients in NYHA class III, a hemoglobin level at the screening visit between 9.5-13.5 g/dl, and iron deficiency, which is defined as serum ferritin level < 100µg/l or between 100 and 299 µg/l, when transferring saturation is < 20%.