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Objective To discuss the effect of atorvastatin to prevent the arterial restenosis after intracavitary therapy of patients with lower atherosclerotic occlusive (LASO).Methods One hundred and ten patients with LASO were randomly divided into the control group (n =55) and research group (n =55).All patients were given intraeavitary therapy (including balloon dilation, stent implantation and endarterectomy, stentimplantation and thromboetomy).The patients of the control group were given conventional anticoagulant therapy while the observation group were given atorvastatin 20 mg/d based same treatment of the control group for 6 months.The blood lipid, C-reactive protein (CRP), intima-media thickness (IMT) and the patency rate of lower limb artery of two group were observed and recorded before treatment and at 1 day,1 month,3 months and 6 months after treatment.Results The total cholesterol (preoperation, 1 month, 3 months and 6 months after operation were (4.90± 1.02) mmol/L, (4.07 ± 0.76) mmol/L, (3.82 ± 0.53) mmol/L and (3.64 ± 0.35) mmol/L respectively), CRP (preoperation, 1 month, 3 months and 6 months after operation were (31.60 ± 13.32) mg/L, (19.24±9.45) mg/L, (9.84 ± 6.43) mg/L and (6.34 ± 3.82) mg/L respectively) and IMT (preoperation, 1 month, 3 months and 6 months after operation were (1.08±0.25) mm, (1.02±0.27) mm, (0.92±0.22) mm and (0.81±0.16) mm respectively) of research group showed a downward trend,while the control group had no significant change, there were statistically significant differences among the research group (P＜0.05).Total cholesterol, IMT and CRP were significantly different among the patients of the research group at different time points (P ＜ 0.05), while there was no statistically significant difference in different times of patient(P＞0.05).There were no statistical significant about the patency rate at 1 day, 1 month,and 3 months after treatment between the two groups(P＞0.05),while the patency rate of research group at 6 months after treatment was obviously higher than that of control group (94.5％ (52/55) vs.74.5％ (41/55);x2 =7.637, P ＜0.05).Conclusion Atorvastatin can effectively reduce the blood lipid and CRP of patients with lower atherosclerotic occlusive and increase the patency rate,it is worth popularization and application.