RESUMO
Objective To investigate the levels and clinical significance of the ratio of apolipoprotein B(apoB)and apolipoprotein A1(apoA1)in the patients with cerebral infarction,and to determine the critical value of apoB/apoA1 inthe patients with ischemic cerebral infarction.Methods 126 inpatients with cerebal infraction diagnosed by MRI enhancement scanning of the head in our hos-pital.From November 1,2012 to May 15,2013 were selected.Among them,51 cases were common carotid artery intima-media thickening(carotid artery intima-media >0.9 mm)and 75 cases were carotid artery intima-media non-thickening by the color ultra-sonic examination;81 cases had atherosclerosis plaque and 45 cases had no atherosclerosis plaque.57 individuals with healthy physi-cal examination were selected as the control group.The fasting serum samples were collected from all the research subjects.The in-dexes of TG,CHOL,HDL-C,LDL-C,apoB,apoA,etc.were detected.Then the independent t-test was adopted to analyze and com-pare the ratio of apoB/apoA1 and others related indictors(including TG,AIP,apoB,apoA1,etc.)in the various groups.The ROC curves were made,the area under the curve was read and the specificity and sensitivity of apoB/apoA1 for diagnosing ischemic cere-bral infarction were calculated.Results (1)AIP and the ratio of apoB/apoA1 in the ischemic cerebral infarction patients were high-er than those in the control group,the rise rate of apoB/apoA1 ratio in the ischemic cerebral infarction patients was 5.43 times of that in the control group,especially the patients with carotid atherosclerosis or carotid artery intima-media thickenning were more significant,while TG and apoB had no obvious changes.(2)the ratio of apoB/apoA1 had no obvious difference between the carotid artery intima-media thickening group and the carotid artery intima-media non-thickening group,while which in the atherosclerotic plaques group was significantly increased compared with no carotid atherosclerosis group and 1.6 times of that in the normal control group.So it could be considered that the apoB/apoA1 ratio was a specific indicator for atherosclerosis.(3)In the diagnosis of ische-mic cerebral infarction,the area under the apoB/apoA1ROC curve was 0.86.its specificity and sensitivity were higher than other in-dexes.Conclusion The apoB/apoA1 ratio is the most specific and sensitive index in the patients with ischemic cerebral infarction and has good correlation with ischemic cerebral infarction,especially in the presence of carotid atherosclerosis plaque it is more sen-sitive,and is a good index of laboratory diagnosis of ischemic cerebral infarction.