Background And Aims: The objective of this observational study was to determine whether there is an association between atrial fibrillation (AF) and uric acid and to identify the risk markers for AF in obstructive sleep apnea (OSA).
Methods: Consecutive patients with newly diagnosed OSA were screened at baseline. The final study population consisted of 516 patients. One hundred and eight patients had AF. Demographic, clinical, laboratory, and echocardiographic characteristics were carefully recorded. Logistic regression was used for the multivariate analysis of independent risk factors.
Results: Uric acid, triglyceride, high-density lipoprotein, C-reactive protein (CRP), left atrial diameter, interventricular septum thickness, apnea hypopnea index, and Epworth sleepiness scale were significantly higher in OSA patients with AF than in those without AF (p <0.05). Among these patients, multiple logistic analyses indicated the independent risk factors for AF occurrence in the OSA subjects included serum uric acid level, left atrial diameter, percentage of time with SaO2 <90%, CRP. The diagnosis analysis showed that higher uric acid, CRP, left atrial diameter and percentage of time with SaO2 <90% had a significant ability to reflect the presence of AF occurrence.
Conclusions: The novel finding of this study is that the occurrence of AF in OSA patients is strongly related to serum uric acid level, left atrial diameter, percentage of time with SaO2 <90% and CRP level. These results may be helpful for monitoring AF occurrence in OSA patients.
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