Frequency of Utilization of Beta Blockers in Patients With Heart Failure and Depression and Their Effect on Mortality

Abstract

Beta blockers reduce mortality and morbidity in patients with heart failure. Early reports linking β-blockers with depression may have limited their use in heart failure patients with co-morbid depression. Although more recent studies have challenged the association between β-blocker therapy and depression, patient and physicians remain concerned. The goal of this study is to evaluate the utilization and outcomes of β-blocker therapy in heart failure patients with depression. This is a retrospective cohort study of patients at a multicenter integrated healthcare system with a diagnosis of heart failure from 2008 to 2014. Among 6,915 patients with heart failure with left ventricular ejection fraction of <50%, 1,252 (18.1%) had a diagnosis of depression. Patients with depression were more likely to be women and had a higher prevalence of cardiovascular risk factors. Depression was associated with decreased odds of β-blocker treatment (adjusted odds ratio [OR], 0.77; 95% confidence interval [CI], 0.62 to 0.95; p = 0.016). During a mean follow-up of 2.6 years, 439 (35.1%) patients with depression died compared with 1,549 (27.4%) patients without depression. Depressed patients not treated with β-blocker had higher mortality compared with nondepressed patients (adjusted hazard ratio [HR], 1.4, 95% CI 1.09 to 1.7, p = 0.005). When treated with β-blockers, their risk of mortality was attenuated (HR 1.1, 95% CI 0.97 to 1.2, p = 0.14). In conclusion, β-blocker therapy remains underutilized in heart failure patients with depression, and its underutilization contributes to the reduced survival rate observed in this cohort.