Abstract:Objective To investigate the association between atrial fibrillation (AF) and serum uric acid (SUA) level in patients with hyperthyroidism. Methods 227 hospitalization patients with hyperthyroidism treated in our hospital from October 2013 to October 2015, were divided into hyperthyroidism with AF group (n = 49) and hyperthyroidism without AF group (n = 178) according to whether had AF or not. Clinical characteristics, laboratory data and characteristics of all patients were carefully recorded. The association between AF and those clinical data of the two groups were analyzed by univariate and multivariate logistic regression analysis. Results The age, duration of hyperthyroidism, blood urea nitrogen, serum creatinine, SUA, globulin, left atrial diameter (LAD), left ventricular end-diastolic dimension (LVEDD) were significantly higher in hyperthyroidism with AF group than those in hyperthyroidism without AF group (P < 0.05). The estimated glomerular filtration rate (eGFR), total cholesterol, high-density lipoprotein, low-density lipoprotein, albumin, left ventricular ejection fraction (LVEF) were lower in hyperthyroidism with AF group than those in hyperthyroidism without AF group (P < 0.05). Multivariate logistic regression analysis showed that only age (■: 1.097, 95% CI: 1.036, 1.160), SUA (■: 1.009, 95% CI: 1.002, 1.016), LAD (■: 1.294, 95% CI: 1.134, 1.476), LVEF (■: 0.902, 95% CI: 0.814, 1.000) were independently associated with AF in patients with hyperthyroidism. Conclusions SUA maybe a risk factor of AF in patients with hyperthyroidism. And age, LAD, LVEF are independently associated with AF in patients with hyperthyroidism.