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Efficacy and Safety of Inorganic Nitrate Versus Placebo Treatment in Heart Failure with Preserved Ejection Fraction

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Abstract

Background

Heart failure with preserved ejection fraction (HFpEF) is common, yet there is a lack of effective treatments. In this meta-analysis, we assessed the efficacy and safety of inorganic nitrate in patients with HFpEF.

Methods and Results

We systematically searched PubMed, Embase, and the Cochrane Library from the inception of the database through March 2020. We included randomized controlled trials that compared the efficacy and safety of inorganic nitrate with a placebo in the treatment of patients with HFpEF. The primary outcome of the meta-analysis was exercise capacity (measured as a change in peak oxygen uptake). We also assessed the effect of inorganic nitrate on diastolic function (measured as changes in E/A and E/e’, assessed by echocardiography), quality of life (estimated using the Kansas City Cardiomyopathy Questionnaire), and rest and exercise hemodynamics (measured by invasive cardiac catheterization). In the pooled data analysis, there were no significant differences in peak oxygen uptake (mL/kg/min) [mean difference (MD), 0.25; 95% CI, − 0.07 to 0.57], diastolic function [E/A–standardized mean difference (SMD), 0.51; 95% CI, − 0.17 to 1.20; or E/e’–SMD, 0.02; 95% CI, − 0.23 to 0.27], or quality of life. However, a significant change was observed in the rest and exercise hemodynamics between the inorganic nitrate and placebo treatment in HFpEF patients. No study has reported the effect of inorganic nitrate on hospitalization and mortality of patients with HFpEF.

Conclusions

In patients with HFpEF, the use of inorganic nitrate is not associated with improvements in exercise capacity, diastolic function, and quality of life but is associated with significant changes in rest and exercise hemodynamics.

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Funding

This study was funded by the grant from the National Natural Science Foundation of China (Nos. 81672264 and 81871858).

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Authors and Affiliations

  1. Department of Cardiology, The Second Xiangya Hospital, Central South University, 139 Middle Renmin Road, Changsha, 410000, Hunan, China

    Yajun Gui, Jingyuan Chen, Jiahui Hu, Limin Deng, Leiling Liu, Kaijun Sun, Ying Tang, Qunyan Xiang, Jin Xu, Liyuan Zhu, Pu Zou, Biao Li & Danyan Xu

  2. Department of Cardiology, Hunan Provincial People’s Hospital, The First Affiliated Hospital of Hunan Normal University, Changsha, 410000, Hunan, China

    Yajun Gui & Zhaofen Zheng

  3. Department of Ultrasonics, The Second Xiangya Hospital, Central South University, 139 Middle Renmin Road, Changsha, 410000, Hunan, China

    Minzhi Ouyang & Zefang Peng

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  1. Yajun Gui
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Correspondence to Danyan Xu.

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Gui, Y., Chen, J., Hu, J. et al. Efficacy and Safety of Inorganic Nitrate Versus Placebo Treatment in Heart Failure with Preserved Ejection Fraction. Cardiovasc Drugs Ther 34, 503–513 (2020). https://doi.org/10.1007/s10557-020-06980-4

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