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Published on: November 7, 2017
Uric acid and heart failure
Masanari Kuwabara1, Arrigo F G Cicero2, Naoyuki Akashi3
1Division of Public Health, Center for Community Medicine, Jichi Medical University, Tochigi, Japan; Division of Cardiovascular Medicine, Department of Medicine, Jichi Medical University Tochigi, Japan.
Insights
Hyperuricemia, common in heart failure patients, may worsen outcomes. While evidence is limited, uric acid-lowering agents like febuxostat show potential, but more research is needed to confirm benefits for heart failure management.
Area of Science:
- Cardiology
- Nephrology
- Pharmacology
Background:
- Heart failure and hyperuricemia are increasing globally.
- Hyperuricemia is a poor prognostic indicator in heart failure.
- Current evidence on treating hyperuricemia in heart failure is insufficient.
Purpose of the Study:
- To review clinical trials on hyperuricemia in heart failure.
- To assess the efficacy of uric acid-lowering agents in heart failure patients.
- To explore the role of serum uric acid in heart failure severity and oxidative stress.
Main Methods:
- Review of clinical trials and cohort studies.
- Analysis of Medicare data from approximately 100,000 participants.
- Examination of evidence on uric acid-lowering agents (e.g., febuxostat, allopurinol).
Main Results:
- Febuxostat showed less heart failure aggravation than allopurinol in a US cohort.
- Serum uric acid may indicate disease severity, xanthine oxidase activity, and oxidative stress.
- Differential effects of uric acid-lowering agents suggest drug-specific cardiovascular impacts.
Conclusions:
- Treating hyperuricemia in heart failure lacks consensus but may be considered if lifestyle changes fail.
- Further large-scale, prospective studies are essential to establish treatment efficacy.
- Drug-specific properties, not just uric acid reduction, might influence cardiovascular outcomes.
Abstract:
The frequency of heart failure and hyperuricemia is increasing worldwide. Hyperuricemia as a complication of heart failure is known to be an indicator of poor prognosis. However, no consensus exists on whether treating hyperuricemia as a complication of heart failure would alleviate symptoms or improve prognosis in patients with heart failure. There is insufficient evidence regarding whether treatment with uric acid-lowering agents can alleviate symptoms and improve prognosis in patients with heart failure. However, considering the prevention of gout, hypertension, and chronic kidney disease caused by hyperuricemia, if the serum uric acid level does not fall below 8 mg/dL with improvement in lifestyle habits, uric acid-lowering agents can be a treatment option. In an US cohort study comprising approximately 100,000 participants using Medicare data, less aggravation of heart failure was observed in patients who were administered febuxostat compared to allopurinol. Recent evidence further suggests that serum uric acid may reflect not only a biomarker of disease severity but also underlying xanthine oxidase activity and oxidative stress, which may be therapeutically targetable in selected subgroups of heart failure patients. Moreover, differential effects among uric acid-lowering agents raise the possibility that drug-specific properties, rather than uric acid reduction per se, may influence cardiovascular outcomes. In this review, we discuss clinical trials on hyperuricemia with heart failure and its treatment. Further large-scale, high-quality, prospective intervention studies on the efficacy of treating hyperuricemia as a complication of heart failure are required.
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