4 results match your criteria: "Duke University and the Duke Clinical Research Institute[Affiliation]"

Aims: Beta-blockers reduce morbidity and mortality in chronic heart failure (HF) patients with reduced ejection fraction. However, there is heterogeneity in the response to these drugs, perhaps due to genetic variations in the β1-adrenergic receptor (ADRβ1). We examined whether the Arg389Gly polymorphism in ADRβ1 interacts with the dose requirements of beta-blockers in patients with systolic HF.

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Objectives: This study sought to examine the association between baseline beta-blocker (BB) dose and outcomes in the HF-ACTION (Heart Failure: A Controlled Trial Investigating Outcomes of Exercise Training) trial.

Background: Beta-blockers reduce morbidity and mortality in chronic heart failure (HF) patients with reduced ejection fraction, but it is unclear whether titrating to higher BB doses improves outcomes in this setting.

Methods: The HF-ACTION trial was a randomized, multicenter trial enrolling 2,331 ambulatory HF patients with systolic dysfunction (New York Heart Association functional class II to IV, left ventricular ejection fraction <0.

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