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Uric acid and cardiovascular disease: a renal-cardiac relationship?
1Division of Nephrology, University of Calgary, Calgary, Alberta, Canada. bruce.culleton@crha-health.ab.ca
Insights
High serum uric acid is common in kidney and cardiovascular disease patients. While linked to hypertension, its direct role in causing cardiovascular issues is not proven, likely reflecting other risk factors.
Area of Science:
- Nephrology
- Cardiology
- Metabolic Disorders
Background:
- Elevated serum uric acid is frequently observed in patients with kidney and cardiovascular diseases.
- Factors like hypertension, sympathetic nervous system overactivity, and hyperinsulinemia contribute to reduced renal urate clearance, leading to hyperuricemia.
- The link between hyperuricemia and cardiovascular disease (CVD) is debated, though it may offer prognostic value in essential hypertension.
Purpose of the Study:
- To review the current literature on the association between serum uric acid and cardiovascular disease.
- To evaluate the evidence for a causal role of serum uric acid in CVD development.
- To assess the prognostic significance of serum uric acid in patients with essential hypertension.
Main Methods:
- Literature review and critical analysis of existing studies.
- Examination of the relationship between serum uric acid levels and cardiovascular outcomes.
- Assessment of the impact of interventions aimed at reducing serum uric acid on cardiovascular events.
Main Results:
- Serum uric acid levels are frequently elevated in patients with kidney and cardiovascular diseases.
- Evidence does not support a causal role for serum uric acid in the development of cardiovascular disease.
- Serum uric acid may provide additional prognostic information in patients with essential hypertension, but its reduction has not been tested for CVD prevention.
Conclusions:
- Serum uric acid likely acts as an integrated marker of various cardiovascular risk factors and their interactions.
- A causal relationship between serum uric acid and cardiovascular disease is not supported by current evidence.
- Further research is needed to clarify the precise role of serum uric acid in cardiovascular health and disease.
Abstract:
Elevated serum uric acid is a frequent finding in patients with kidney disease and cardiovascular disease. Intrarenal ischaemia, induced by hypertension, increased sympathetic nervous system activity, and hyperinsulinaemia have all been implicated in reduced renal clearance of urate. This frequently results in elevated serum uric acid levels. The association of hyperuricaemia with cardiovascular disease remains controversial. Current evidence suggests that serum uric acid may provide additional prognostic information in patients with essential hypertension. However, there has been no test of the hypothesis that a reduction in serum uric acid would prevent cardiovascular disease. Furthermore, a critical review of the current literature does not support a causal role of serum uric acid in the development of cardiovascular disease. Serum uric acid probably reflects and integrates different risk factors and their possible interactions.