Serum uric acid is associated with microvascular function in hypertensive individuals

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Abstract

We investigated the relationship of serum uric acid (UA) with resting forearm blood flow (FBF), reactive hyperaemia (RH) and flow-mediated dilation (FMD) of the brachial artery in hypertensive adults (n = 506, mean age 62 years, 59% women). UA was measured by a colorimetric method. FBF, RH and FMD were measured by brachial artery ultrasound. Regression analyses were used to assess whether UA was associated with FBF, RH and FMD before and after adjustment for age, sex, systolic BP, diabetes, total and high-density lipoprotein cholesterol, smoking, body mass index (BMI), C-reactive protein (CRP), serum creatinine, alcohol intake, statin and diuretic use and brachial artery diameter (BAD). UA was significantly associated with FBF (P < 0.0001) and RH (P = 0.0001) but not with FMD (P = 0.43). After adjustment for the covariates listed above, higher UA level remained independently associated with a higher FBF (P = 0.012) and lower RH (P = 0.004). The independent predictors were as follows: (a) higher FBF: Lower age, higher BMI, history of smoking, statin use, higher CRP, higher BAD and higher UA levels; (b) lower RH: Higher BMI, diabetes and higher UA levels; (c) lower FMD: Greater age, male sex, higher BMI, history of smoking, statin use and higher BAD. We conclude that in hypertensive individuals, higher UA levels are associated with higher resting FBF and lower RH, markers of microvascular function, but not with brachial artery FMD.

Original languageEnglish (US)
Pages (from-to)610-615
Number of pages6
JournalJournal of Human Hypertension
Volume21
Issue number8
DOIs
StatePublished - Aug 2007

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Uric Acid
Hyperemia
Brachial Artery
Forearm
Dilatation
Serum
Hydroxymethylglutaryl-CoA Reductase Inhibitors
Body Mass Index
Smoking
C-Reactive Protein
Diuretics
HDL Cholesterol
Creatinine
Regression Analysis
Alcohols

ASJC Scopus subject areas

  • Internal Medicine

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Serum uric acid is associated with microvascular function in hypertensive individuals. / de, T.; Turner, Stephen T; Kullo, Iftikhar Jan.

In: Journal of Human Hypertension, Vol. 21, No. 8, 08.2007, p. 610-615.

Research output: Contribution to journalArticle

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