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Uric acid--a marker for systemic inflammatory response in patients with congestive heart failure?
Peter Olexa1, Martina Olexová, Jozef Gonsorcík
14th Department of Internal Medicine, Faculty Hospital of L. Pasteur, Kosice, Slovak Republic. polexa@post.sk
Insights
Serum uric acid levels correlate with inflammation and reduced ejection fraction in heart failure patients. Higher uric acid may indicate worse systolic dysfunction and increased inflammatory response.
Area of Science:
- Cardiology
- Biochemistry
- Immunology
Background:
- Congestive heart failure (CHF) is linked to hyperuricemia and elevated inflammatory markers.
- Understanding the interplay between uric acid, inflammation, and cardiac function is crucial.
Purpose of the Study:
- To investigate the relationship between serum uric acid, renin-angiotensin-aldosterone system (RAAS) activity, and TNF-alpha.
- To assess these relationships in relation to the severity of left ventricular (LV) dysfunction in CHF patients.
Main Methods:
- Measured serum uric acid, TNF-alpha, plasma renin activity, and aldosterone in 30 CHF patients.
- Classified patients into NYHA functional classes II-IV.
- Analyzed correlations and used multivariate modeling.
Main Results:
- TNF-alpha levels increased progressively with NYHA class.
- Uric acid, plasma renin, and aldosterone levels differed significantly across subgroups.
- Serum uric acid correlated positively with TNF-alpha, leukocytes, and negatively with ejection fraction.
- Uric acid levels were predicted by ejection fraction and leukocytes, independent of other factors.
Conclusions:
- Serum uric acid may serve as a marker for the severity of systolic dysfunction in CHF.
- Uric acid levels may reflect the degree of inflammatory activation in CHF patients.
Abstract:
Congestive heart failure is associated with hyperuricemia and elevations in the levels of circulating markers for inflammation. The purpose of this study was to assess the relationship between levels of serum uric acid, activity of the renin-angiotensin-aldosterone system and TNF-alpha in heart failure patients with respect to the extent of left ventricular dysfunction. Circulating uric acid, TNF-alpha, plasma renin activity and concentrations of aldosterone were measured in 30 patients with congestive heart failure, divided into subgroups according to their NYHA class (II-IV). We found a significant step-by-step increase in TNF-alpha among the subgroups. Significant differences among the subgroups were found for the values of uric acid and the values of plasma renin and aldosterone. Serum uric acid correlated significantly with TNF-alpha concentrations (r = 0.36, P < 0.05) leukocytes (r = 0.38, P = 0.03) and ejection fraction (r = 0.64, P < 0.01). No significant correlation was found between the activity of the renin-angiotensin-aldosterone system and uricemia (r = 0.34). In a multivariate model, uric acid concentration was predicted significantly by the ejection fraction and blood leukocytes, this relationship being independent of serum creatinine, treatment modality, age and gender. We conclude that serum uric acid may reflect the severity of systolic dysfunction and the activation of an inflammatory reaction in patients with congestive heart failure.