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Serum uric acid for risk stratification of patients with coronary artery disease
Yafim Brodov1, Pierre Chouraqui, Ilan Goldenberg
1Heart Institute, Sheba Medical Center, Tel Hashomer, Israel. brodov_y@bezeqint.net
Insights
Elevated serum uric acid (SUA) in coronary artery disease (CAD) patients predicts cardiac events. This risk remains significant even after accounting for kidney function, highlighting SUA as an independent predictor.
Area of Science:
- Cardiology
- Nephrology
- Metabolic Syndrome
Background:
- Elevated serum uric acid (SUA) is linked to adverse cardiovascular outcomes in coronary artery disease (CAD).
- Renal function significantly influences SUA levels.
- The independent predictive value of SUA in CAD patients, considering renal function, requires further elucidation.
Purpose of the Study:
- To evaluate the predictive capability of serum uric acid (SUA) levels for cardiovascular events in patients with coronary artery disease (CAD).
- To determine if the association between SUA and cardiovascular outcomes persists after adjusting for renal function, specifically estimated glomerular filtration rate (eGFR).
Main Methods:
- Analysis of 2,796 nondiabetic CAD patients from the Bezafibrate Infarction Prevention study.
- Assessment of primary endpoint (PEP) risk, including myocardial infarction (MI) and sudden death, across SUA quintiles.
- Statistical adjustments for multiple clinical variables and eGFR to ascertain the independent association of SUA with PEP risk.
Main Results:
- A dose-response relationship was observed, with the highest SUA quintile showing the highest PEP risk (18.0%).
- Elevated SUA remained a significant predictor of PEP risk (HR: 1.47) after comprehensive clinical adjustments.
- This association persisted even after additional adjustment for eGFR (HR: 1.46), indicating independence from renal function.
Conclusions:
- In nondiabetic patients with CAD, elevated serum uric acid (SUA) levels are independently associated with an increased risk of cardiac events.
- Serum uric acid serves as a valuable prognostic marker for cardiovascular outcomes in CAD, irrespective of renal function.
Objectives:
In patients with coronary artery disease (CAD), elevated serum uric acid (SUA) levels may predict worse cardiovascular outcomes. It is known that SUA levels are influenced by renal function. We aimed to assess the predictive value of SUA while taking into account patients' renal function.
Methods:
The primary end point (PEP) risk, including fatal or nonfatal myocardial infarction (MI) or sudden death, was assessed by SUA quintiles before and after adjustment for the estimated glomerular filtration rate (eGFR) in 2,796 nondiabetic CAD patients enrolled in the Bezafibrate Infarction Prevention study.
Results:
The PEP risk increased from the lowest (11.8%) to highest SUA quintile (18.0%), p < 0.005, respectively. After adjustment for age, sex, smoking, prior MI, metabolic syndrome variables, NYHA classes II-IV, heart rate and treatment with bezafibrate, diuretics, angiotensin-converting enzyme inhibitors, beta-blockers, calcium channel blockers and antiplatelets, the highest SUA quintile exhibited the highest PEP risk [hazard ratio (HR): 1.47 (95% CI: 1.06-2.04)]. Patients in the highest - compared with those in the lowest - quintiles continued to demonstrate an increased PEP risk [HR: 1.46 (95% CI: 1.04-2.06)], even after additional adjustment for the eGFR.
Conclusion:
In nondiabetic patients with CAD, elevated SUA levels are associated with an increased risk of cardiac events, independent of renal function.
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