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In the genetic sub-study of the BEST trial, researchers categorized patients into three groups based on receptor genotype: very favorable, favorable and unfavorable. Patients with the very favorable genotype experienced significant improvements in clinical endpoints compared to placebo, including reductions in all cause mortality, all cause mortality or transplant, cardiovascular mortality, heart failure hospitalization, and cardiovascular hospitalization. While the most robust clinical effects occurred in the very favorable genotype group, patients with the favorable genotype also benefited from treatment with bucindolol. Bucindolol also demonstrated clinically significant improvements in ischemic endpoints including reducing the risk of myocardial infarction. Patients with the unfavorable genotype, approximately 10 percent of the study population, did not respond to bucindolol therapy.
About Beta Blockers
The use of beta blockers is the standard of care in patients with heart failure and left ventricular dysfunction, according to clinical practice guidelines of the Heart Failure Society of America (HFSA), the American Heart Association, and the American College of Cardiology. HFSA guidelines state: "Beta-blocker therapy remains a major advance in the treatment of patients with LV systolic dysfunction. Along with ACE inhibitors, this class of drug is now established as routine therapy in patients with LV systolic dysfunction."
About Heart Failure
Heart failure is a chronic and progressive condition in which the heart
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