Associations of serum uric acid level and gout with cardiac structure, function and sex differences from large scale asymptomatic Asians.

ABSTRACT

Hyperuricemia (HU) is a marker for heart failure. There are relatively few data in the Asian population regarding the effects of hyperuricemia and gouty disorders on cardiac remodeling and diastolic dysfunction (DD), an intermediate stage in the development of heart failure. We consecutively recruited asymptomatic Asian individuals to undergo cardiovascular surveys. We categorized them into Non-HU, HU, and Gout groups. We measured cardiac structure and indices for diastolic function, including tissue Doppler (TDI)-derived LV e' and E/e'. Among 5525 participants, 1568 had HU and 347 had gout. The presence of gout and higher uric acid levels (SUA) (<4, 4-6, 6-8, 8-10, > = 10 mg/dL) were associated with greater LV wall thickness, greater LV mass/volumes, larger LA volume, lower LV e' and higher E/e'. Higher SUA was associated with greater LV mass index (adjusted coefficient 0.37), greater mass/volume ratio (adjusted coefficient 0.01) and larger LA volume index (adjusted coefficient 0.39, all p<0.05). Both HU and Gout groups were associated with lower LV e' (coefficient -0.086, -0.05), higher E/e' (coefficient 0.075, 0.35, all p <0.05), larger LA volume, and higher DD risk (adjusted ORs 1.21 and 1.91 using Non-HU as reference, respectively, both p <0.05). SUA set at 7.0 mg/dL provided the optimal cut-off for identifying DD, with markedly lower e' (HU 8.94 vs 8.07, Gout 7.94 vs 7.26 cm/sec) and higher LV E/e' in HU/Gout women than in men (HU 7.84 vs 9.79 cm/sec for men and women, respectively, all p <0.05). Hyperuricemia, even at a relatively low clinical cut-off, was associated with unfavorable remodeling and was tightly linked to diastolic dysfunction. The presence of gout likely aggravated these conditions. Women with hyperuricemia or gout had worse diastolic indices than men despite similar degrees of LV remodeling.