Prognostic Significance of Heart Rate and Beta-Blocker Use in Sinus Rhythm in Patients with Heart Failure and Preserved Ejection Fraction

Abstract

Introduction: Prognostic significance of heart rate (HR) in heart failure with preserved ejection fraction (HFpEF) remains poorly understood. Aim: To evaluate the association of HR and beta-blocker use with all-cause mortality and the optimal HR range in patients with HFpEF and sinus rhythm (SR). Methods: During a follow-up of 2.7 years (IQR 1.2–4.1 years), the 330 patients with median age 73 (IQR 64–79) years, 52.1% men, were included. HFpEF was defined as patients with EF ≥ 50%. The outcome measure was all-cause mortality. Results: In total, 96 (29.1%) of patients with HFpEF and SR died. A linear tendency between HR and mortality was observed in SR. Compared to the reference strata HR ≤ 60 bpm, HR increment was associated with progressively increased risk in mortality (Chi-square = 13.90, Log rank P = 0.001) by Kaplan–Meier analyses. Univariate Cox regression showed that in SR, compared with that in HR 61–80 bpm, the unadjusted hazard ratios for mortality were 0.41 (95% CI 0.23–0.74, P = 0.003) in HR ≤ 60 bpm, 1.38 (95% CI 0.85–2.24, P = 0.189) in HR > 80 bpm. Multivariate Cox regression showed that compared with that in HR 61–80 bpm, the adjusted hazard ratios for mortality were 0.37 (95% CI 0.19–0.75, P = 0.005) in HR ≤ 60 bpm, 0.96 (95% CI 0.52–1.74, P = 0.899) in HR > 80 bpm. Univariate Cox regression showed that the unadjusted hazard ratios for mortality were 0.52 (95% CI 0.33–0.84, P = 0.003) in patients with beta-blocker as compared patients without beta-blocker. Multivariate Cox regression showed that the adjusted hazard ratios for mortality were 0.48 (95% CI 0.26–0.87, P = 0.016) in patients with beta-blocker as compared patients without beta-blocker. Conclusions: HR is independently associated with increased all-cause mortality in SR and a lower HR (≤ 60 bpm) is favorable for better outcome in HFpEF patients with SR. Beta-blocker use is associated with reduced mortality and a lower HR is associated with reduced mortality in HFpEF patients with SR.