Reversal of Ventricular Remodeling With Toprol-XL

Inclusion Criteria: * Diagnosis of stable asymptomatic heart failure. * Documented ejection fraction less than 0.40. * Must be able to comply with all study procedures. Exclusion Criteria: * Taken B-blocker therapy for longer than 1 week within 6 months prior to randomization. * Have heart problems that would not allow B-blocker therapy. * Receiving B-blockers therapy for any medical reason including topical B-blockers that might cause systemic absorption (e.g., glaucoma). * Undergone certain heart surgeries, such as, prior heart transplant or cardiomyoplasty. * Have certain heart diseases. * Pregnant or breast feeding. * Unlikely to survive.