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Background: In the recent years, oxidative stress was attended as one of the causal factors of ischemic stroke. In terms of the role of genetic, geographic and ethnic factors in the prevalence of stroke, This study was designed to compare the oxidative stress indexes of stroke patients with normal healthy subjects in this geographic area. Methods and Materials: In this case-control study, 36 patients older than 50 years with ischemic stroke and 45 healthy subjects with same age and sex, were enrolled. Five milliliter blood were drawn from all subjects. Samples were centrifuged and plasma was separated. Total antioxidant capacity, lipid peroxidation and thiol levels were measured respettively by FRAP, TBA and HU methods. Then the result was analyzed using t-test. Results: Results showed total antioxidant capacity and thiol plasma levels were lower in stroke patients in compare to healthy subjects, but only the thiol group had significant difference(P=0/001). Although lipid peroxidation showed a slight but non-significant difference in stroke patients in compare to control group. Conclusion: These findings suggest oxidative stress in patients with acute ischemic stroke may be conseaqence of an imbalance in oxidant/antioxidant homeostasis. Therefore it may be useful to recommend antioxidant medications or diet for these patients.

Keywords: Ischemic, stroke, oxidative stress, free radicals

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