Uric acid and risk of incident heart failure in individuals with cardiovascular disease

Abstract

Background and aimsUric acid has been positively associated with the risk of developing heart failure in the general population. Nevertheless, it remains unclear whether hyperuricemia is an independent risk factor for heart failure and further contributes to the risk of heart failure among the already at-risk cardiovascular disease (CVD) population. This study aimed to evaluate the association between uric acid and incident heart failure in individuals with established CVD. Methods and resultsIncluded were 18,438 adults with established CVD but free of heart failure at baseline, from the Kailuan Study. Incident heart failure cases were ascertained by medical records. Cause-specific Cox proportional hazards regression models were applied to estimate hazard ratios (HRs) and 95% confidence intervals (CIs) of heart failure according to uric acid tertiles. Over a median follow-up of 6.1 years, we identified 1,215 incident heart failure cases. Higher uric acid was associated with a higher risk of incident heart failure, with adjusted HR for the last vs. first tertile of 1.50 (95%CI:1.30-1.73). Higher uric acid concentrations were associated with an increased risk of heart failure in individuals with coronary heart disease, atrial fibrillation, and ischemic stroke, but not in those with hemorrhagic stroke. Moreover, the observed association between uric acid and heart failure risk was more pronounced in individuals diagnosed with heart failure with reduced ejection fraction subtype compared with heart failure with preserved ejection fraction. ConclusionsIn individuals with CVD, uric acid was positively associated with the risk of heart failure, in a dose-response manner.