Objective To explore the effect and mechanism of atorvastatin and simvastatin on carotid atherosclerosis in old patients.Methods Sixty-one old patients with carotid atherosclerosis were randomized into atorvastatin(n= 30) and simvastatin treatment groups(n=31) for six months.Intima-media thickness(IMT) of carotid artery,carotid plaques score.carotid plaques area, CRP.urinary microalbuminC MALb),serum lipids were detected before and after treatment for six months.Results IMT of carotid artery,carotid plaques...