Objective:To explore changes of oxidized loW density lipoprotein (ox-LDL)and tumor necrosis factor (TNF)-αcontent in patients With different degrees coronary heart disease (CHD)and their correlation.Methods:A total of 100 CHD patients diagnosed by coronary angiography (CAG)Were selected and divided into stable angina pectoris (SAP)group (n=23),unstable angina pectoris (UAP)group (n=48)and acute myocardial infarction (AMI)group (n=29);single vessel group (n=31),double vessel group (n=33)and multi-vessel disease group (n=36);mild stenosis group (n=27), moderate stenosis group (n=31)and severe stenosis group (n=42).A total of 30 middle-aged and aged people Without CHD and severe organic diseases,Were enrolled as healthy control group.Content of total cholesterol (TC),triglyceride(TG),high density lipoprotein cholesterol (HDL-C),loW density lipoprotein cholesterol (LDL-C),ox-LDL and TNF-α Were measured among above groups.Results:Compared With healthy control group,there Were significant increase in blood lipid levels (except HDL-C),TNF-αlevel,and significant decrease in HDL-C level in CHD group,P <0.05 all; compared With SAP group,thereWere significant increase in levels of ox-LDL and TNF-αin UAP group and AMI group (P <0.05 all),and those of AMI groupWere significantly higher than those of UAP group (P <0.05 both);comparedWith single vessel disease group,there Were significant increase in levels of ox-LDL [(432.19±80.75)μg/L vs.(560.47± 84.21)μg/L,(619.31±88.49)μg/L]and TNF-α[(9.01±2.75)ng/L vs.(10.06±2.78)ng/L,(11.14±2.74)ng/L] in double-vessel and multi-vessel disease group (P <0.05 all),and those of multi-vessel disease group Were significantly higher than those of double-vessel disease group (P <0.05 both);comparedWith mild stenosis group,thereWere significant increase in levels of ox-LDL [(459.43±53.36)μg/L vs.(531.33±68.12)μg/L,(610.62±93.43)μg/L]and TNF-α[(8.98±2.66)ng/L vs.(9.94±2.87)ng/L,(11.12±3.21)ng/L]in moderate stenosis group and severe stenosis group (P <0.05 all),and those of severe stenosis groupWere significantly higher than those of moderate stenosis group (P <0.05 both);Spearman correlation analysis indicated that ox-LDL levelWas positively correlatedWith TNF-αlevel (r =0.83,P <0.01).Conclusion:Levels of ox-LDL and TNF-αare closely correlatedWith lesion severity in CHD patients.%目的：探讨不同冠脉病变程度冠心病患者氧化低密度脂蛋白（ox-LDL）、肿瘤坏死因子-α（TNF-α）水平变化及其相关性。方法：选择100例冠脉造影确诊为冠心病的患者（冠心病组），分为：稳定型心绞痛（SAP）组（23例）、不稳定型心绞痛（UAP）组（48例）、急性心肌梗死（AMI）组（29例）；单支组（31例）、双支组（33例）、多支病变组（36例）；轻度狭窄组（27例）、中度狭窄组（31例）、重度狭窄组（42例）。选择同期体检无冠心病及严重器质性病变的中老年人30例为健康对照组。测定各组 TC、TG、HDL-C、LDL-C、ox-LDL及 TNF-α水平。结果：冠心病组患者血脂（除 HDL-C）和TNF-α水平均显著高于健康对照组（P＜0.05或＜0.01），HDL-C显著低于健康对照组（P＜0.05）；UAP组、AMI组 ox-LDL、TNF-α水平显著高于 SAP 组、UAP 组（P 均＜0.05）；双支、多支病变组ox-LDL [（560.47±84.21）μg/L、（619.31±88.49）μg/L比（432.19±80.75）μg/L]、TNF-α[（10.06±2.78）ng/L、（11.14±2.74）ng/L比（9.01±2.75）ng/L]水平显著高于单支病变组（P＜0.05），多支病变组高于双支病变组（P＜0.05）；中度、重度狭窄组ox-LDL [（531.33±68.12）μg/L、（610.62±93.43）μg/L比（459.43±53.36）μg/L]、TNF-α[（9.94±2.87）ng/L、（11.12±3.21）ng/L比（8.98±2.66） ng/L]水平显著高于轻度狭窄组（P＜0.05），重度狭窄组显著高于中度狭窄组（P＜0.05）；Spearman相关分析显示，ox-LDL与TNF-α水平呈正相关（r＝0.83，P＜0.01）。结论：ox-LDL、TNF-α水平与冠心病患者病变严重程度具有密切相关性。
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