![]() Hemoglobin less than 10.0 g/dL at screening.Room air oxygen saturation under 90% at screening.Patients with documented Gilbert syndrome and TBL greater than or equal to 2 times ULN due to unconjugated hyperbilirubinemia, without other hepatic impairment, are permitted. At screening: Resting systolic BP greater than 140 mmHg or less than 85 mmHg, or diastolic BP greater than 90 mmHg (mean of triplicate readings) Resting heart rate greater than 90 beats per minute, or less than 50 beats per minute (mean of triplicate readings) Estimated glomerular filtration rate (eGFR) less than 30 mL/min/1.73m2 (by the modified Modification of Diet in Renal Disease equation) Hepatic impairment defined by a total bilirubin (TBL) greater than or equal to 2 times the upper limit of normal (ULN), or alanine aminotransferase (ALT) or aspartate aminotransferase (AST) greater than or equal to 3 times ULN.This includes episodes of decompensated HF that require IV HF treatment. Major medical event or procedure within 3 months prior to randomization, including: hospitalization, surgery, renal replacement therapy or cardiac procedure.The use of canes for stability while ambulating is acceptable if the subject is deemed capable of performing CPET. Requires assistance to walk or use of mobility assistive devices such as motorized devices, wheelchairs, or walkers.Ongoing or planned enrollment in cardiac rehabilitation.Chronic, stable use of oral iron is permitted. History of gastrointestinal bleeding requiring hospitalization, urgent procedure or transfusion in the prior year, or received intravenous (IV) iron, blood transfusion, or an erythropoiesis-stimulating agent (ESA) within 3 months prior to screening, or planned blood transfusion or ESA use during the study screening or treatment period.Symptomatic bradycardia, second-degree Mobitz type II, or third-degree heart block without a pacemaker.Subjects with persistent atrial fibrillation and no sinus rhythm documented in the prior 6 months are permitted. Paroxysmal atrial fibrillation or flutter documented within the previous 6 months, direct-current (DC) cardioversion or ablation procedure for atrial fibrillation within 6 months, or plan to attempt to restore sinus rhythm within 6 months of randomization.Severe uncorrected valvular heart disease.Peak VO2 less than or equal to 75% of the predicted normal value with respiratory exchange ratio (RER) greater than or equal to 1.05 on a screening CPET, confirmed by a CPET core laboratory.N-terminal (NT)-proBNP level greater than or equal to 200 pg/mL.Beta blocker dose must be stable for 30 days prior to randomization. On maximally tolerated HF standard of care (SoC) therapies consistent with regional clinical practice guidelines, if not contraindicated and according to investigator judgment of the subject's clinical status.Left ventricular ejection fraction less than or equal to 35%.New York Heart Association (NYHA) class II or III at screening.History of chronic HF, defined as requiring continuous treatment with medications for HF for a minimum of 3 months before screening.Male or female, greater than or equal to 18 to lesser than or equal to 85 years of age. ![]()
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