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Year : 2017  |  Volume : 8  |  Issue : 3  |  Page : 124-131

Evaluation of efficacy of metoprolol in patients having heart failure with preserved ejection fraction: A randomized, double-blind, placebo-controlled pilot trial

1 Department of Pharmacology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
2 Department of Cardiology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
3 Department of Internal Medicine, Postgraduate Institute of Medical Education and Research, Chandigarh, India

Correspondence Address:
Nusrat Shafiq
Department of Pharmacology, Research Block B, Postgraduate Institute of Medical Education and Research, Sector 12, Chandigarh - 160 012
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/2229-3485.210449

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Background: There is a lack of evidence-based therapies for the treatment of heart failure (HF) with preserved ejection fraction (HFpEF). Beta blockers may provide some benefit in HFpEF due to their proven role in HF with reduced ejection fraction. Aim: The main objective of the present study was to evaluate the efficacy of controlled-release metoprolol (metoprolol succinate) in HFpEF. Materials and Methods: This was an investigator-initiated, randomized, double-blind, placebo-controlled, 14-week pilot study with metoprolol succinate as a study drug. Dose titration protocol was used with optional upward titration of doses ranging from 25 to 100 mg. The end points included clinical, echocardiographic, biochemical (N-terminal pro-B-type natriuretic peptide and serum carboxy-terminal propeptide of procollagen type I), and quality of life (QoL) (SF-36) parameters. Results: Twenty patients were enrolled in each of the treatment arms. An improvement in New York Heart Association class and exercise capacity was seen in both treatment arms. The mean change in various echocardiographic and biochemical parameters between the two groups was statistically insignificant. A significant improvement in some QoL parameters was observed in both the groups. No serious adverse events were seen. Conclusion: Hence, this pilot study showed that metoprolol succinate possibly has some beneficial role in HFpEF as reflected by improvement in some parameters. The findings highlight the need of a larger study with longer follow-up to provide a definitive answer.

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