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JACC Heart Fail. 2016 Jun;4(6):428-37. doi: 10.1016/j.jchf.2015.12.013. Epub 2016 Feb 10.

One Week of Daily Dosing With Beetroot Juice Improves Submaximal Endurance and Blood Pressure in Older Patients With Heart Failure and Preserved Ejection Fraction.

Author information

1
Sections of Cardiovascular Medicine and Geriatrics, Wake Forest School of Medicine, Winston-Salem, North Carolina.
2
Department of Physics, Wake Forest University, Winston-Salem, North Carolina; Translational Science Center, Wake Forest University, Winston-Salem, North Carolina. Electronic address: shapiro@wfu.edu.
3
College of Nursing and Health Innovation, University of Texas at Arlington, Arlington, Texas.
4
Department of Public Health Sciences, Wake Forest School of Medicine, Winston-Salem, North Carolina.
5
Department of Physics, Wake Forest University, Winston-Salem, North Carolina; Translational Science Center, Wake Forest University, Winston-Salem, North Carolina.
6
Translational Science Center, Wake Forest University, Winston-Salem, North Carolina; Health and Exercise Science Department, Wake Forest University, Winston-Salem, North Carolina.
7
Sections of Cardiovascular Medicine and Geriatrics, Wake Forest School of Medicine, Winston-Salem, North Carolina; Translational Science Center, Wake Forest University, Winston-Salem, North Carolina. Electronic address: dkitzman@wakehealth.edu.

Abstract

OBJECTIVES:

This study sought to determine whether a relatively low single dose or a week-long dosage of dietary inorganic nitrate could improve exercise tolerance in patients with heart failure with preserved ejection fraction (HFpEF).

BACKGROUND:

Exercise intolerance is the primary manifestation of HFpEF and is largely due to noncardiac factors that reduce oxygen delivery to active skeletal muscles. A recent study showed improved exercise capacity in patients with HFpEF after a single, acute dose of beetroot juice (BRJ) (12.9 mmol inorganic nitrate) while another recent study showed neutral and negative effects of an organic nitrate.

METHODS:

Twenty HFpEF patients (69 ± 7 years of age ) were enrolled in an initial cross-over design comparing a single, acute dose of BRJ (6.1 mmol nitrate) to a nitrate-depleted placebo BRJ. A second phase, 1 week of daily doses, used an all-treated design in which patients consumed BRJ for an average of 7 days. The primary outcome of the study was submaximal aerobic endurance, measured as cycling time to exhaustion at 75% of measured maximal power output.

RESULTS:

No adverse events were associated with the intervention. Submaximal aerobic endurance improved 24% after 1 week of daily BRJ dosing (p = 0.02) but was not affected by the single, acute dose of the BRJ compared to placebo. Consumption of BRJ significantly reduced resting systolic blood pressure and increased plasma nitrate and nitrite in both of the dosing schemes.

CONCLUSIONS:

One week of daily dosing with BRJ (6.1 mmol inorganic nitrate) significantly improves submaximal aerobic endurance and blood pressure in elderly HFpEF patients.

KEYWORDS:

exercise; heart failure with preserved ejection fraction; nitrate; nitric oxide; nitrite

PMID:
26874390
PMCID:
PMC4892939
DOI:
10.1016/j.jchf.2015.12.013
[Indexed for MEDLINE]
Free PMC Article

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