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The impact of heart rate on patients diagnosed with heart failure with mid-range ejection fraction [Anatol J Cardiol]
Anatol J Cardiol. Ahead of Print: AJC-38364 | DOI: 10.14744/AnatolJCardiol.2018.38364  

The impact of heart rate on patients diagnosed with heart failure with mid-range ejection fraction

Yanguo Xin1, Xin Chen2, Yinan Zhao3, Wenyu Hu4
1Department of Cardiology, West China Hospital, Sichuan University; Sichuan-China
2Department of Cardiology, Fuling Central Hospital of Chongqing; Chongqing-China
3Department of Neurology, The First Affiliated Hospital, China Medical University; Shenyang-China
4Department of Cardiology, The First Affiliated Hospital, China Medical University; Shenyang-China

Objective: The relationship between prognosis and heart rate remains unclear among patients diagnosed with heart failure with mid-range ejection fraction (HFmrEF). The aim of the present study was to assess the effect of heart rate in this group of patients.
Methods: Of the 197 patients diagnosed with HFmrEF, 92 had a heart rate <70 beats/min (bpm), and 105 had a heart rate ≥70 bpm. We analyzed the outcomes including all-cause death and HF-related hospitalization and evaluated the quality of life.
Results: The outcome demonstrated a lower incidence in patients with heart rate <70 bpm. The outcome-free survival illustrated significant difference in survival rate (p=0.045). The Minnesota Living with Heart Failure Questionnaire total scores and physical subscale in the lower heart rate group decreased compared with the heart rate ≥70 bpm group (p=0.048 and p=0.03, respectively). In the following analysis of patients with sinus rhythm, beta blockers showed great positive effects on patients with heart rate <70 bpm (p=0.046), as for the quality of life in patients with beta blocker, heart rate <70 bpm showed lower total and physical scores (p=0.025 and p=0.017, respectively).
Conclusion: Our results showed that heart rate is an important prognostic factor in patients with HFmrEF. Patients with heart rate <70 bpm was
related with a lower risk of outcomes and better quality of life. Beta blockers reduced the outcome rate in patients with sinus rhythm.

Keywords: HFmrEF, heart rate, quality of life, beta blockers




Corresponding Author: Wenyu Hu, China


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