Abstract 12221: Impact of Serum Uric Acid on Mortality in Heart Failure With Preserved Ejection Fraction

Abstract

Background: Serum uric acid is a predictor of cardiovascular mortality in heart failure with reduced ejection fraction. However, the impact of uric acid on heart failure with preserved ejection fraction (HFpEF) remains unclear. Here we investigated the association between hyperuricemia and mortality in HFpEF patients. Methods and Results: Consecutive 424 patients, who admitted to our hospital for decompensated heart failure and diagnosed as HFpEF, were divided into two groups based on presence of hyperuricemia (serum uric acid ≥ 7 mg/dl). We compared patient characteristics, cardio-ankle vascular index and cardio-pulmonary exercise test findings between the two groups. Furthermore, we prospectively followed cardiac and all-cause mortality. The hyperuricemia group (n=254), as compared with non-hyperuricemia group (n=170), had higher prevalence of male gender (55.5 vs. 41.7%, P=0.005), hypertension (79.9 vs. 69.4%, P=0.013), diabetes mellitus (38.5 vs. 26.4%, P=0.010) and use of diuretics (72.4 vs. 41.7%, P<0.001). Furthermore, the hyperuricemia group had higher levels of B-type natriuretic peptide (112.3 vs. 71.4 pg/ml, P<0.001), lower levels of estimated GFR (53.2 vs. 69.7 ml/min/1.73m 2 , P<0.001), higher cardio-ankle vascular index (8.7 vs. 7.5, P<0.001), lower peak VO 2 (14.9 vs. 17.9 ml/kg/min, P<0.001) and higher VE/VCO 2 slope (34.9 vs. 31.9, P=0.02) compared with non-hyperuricemia group. In the follow up period (mean of 897 days), cardiac and all-cause mortalities were significantly higher in those with hyperuricemia (P=0.006 and P=0.004, respectively). In the multivariable Cox proportional hazard analyses after adjusting for confounding factors including chronic kidney disease and use of diuretics, hyperuricemia was an independent predictor of all-cause mortality (hazard ratio 1.98, P=0.039). Conclusion: Hyperuricemia is associated with arterial stiffness, impaired exercise capacity, and high mortality in HFpEF.