EPO and heart failure: ACVB, aortocoronary venous bypass; HCT, hematocrit; HF, heart failure; Hgb, hemoglobin; mHR, heart rate; EPO, erythropoietin; LV, left ventricle; LVEDV, left ventricle end-diastolic volume; LVEF, left ventricle ejection fraction; LVESV, left ventricle end-systolic volume; MACE, major adverse cardiovascular events; MI, myocardial infarction; PCI, percutaneous coronary intervention; RCTs, randomized controlled trials