An Exploratory Sub-study for the RED-HF™ (Reduction of Events With Darbepoetin Alfa in Heart Failure) Trial

Double-Blind, Placebo Controlled, Multicenter Study to Assess the Effect of Darbepoetin Alfa Treatment on Cardiac Function and Disease Specific Biomarkers in Subjects With Symptomatic Left Ventricular Systolic Dysfunction and Anemia: An Exploratory Sub-study for the RED-HF™ Trial

The purpose of Study 20060172 was to measure echocardiographic parameters and biomarkers in a subgroup of study subjects enrolled in Study 20050222 (the RED-HF Trial). This substudy 20060172 was terminated early due to feasibility constraints. All subjects enrolled in 20060172 were also enrolled in Study 20050222, which is ongoing. Study data will be analyzed when Study 20050222 ends, since unblinding before then would adversely affect Study 20050222.

Inclusion Criteria:

• Signed informed consent for Study 20060172
• Randomized into Study 20050222

Exclusion Criteria:

• Any condition or situation that, in the investigator's opinion, may put the subject at significant risk, render the subject unsuitable for accurate echocardiography, may confound the study results, or may interfere significantly with the subject's participation in Study 20060172 or in Study 20050222.