空腹血糖正常的冠心病患者糖代谢状况与血PAI—1,hsCRP,HbA1c及

作者:李嘉,陈鹏,吴连拼,杨鹏麟。

【摘要】   目的 :调查空腹血糖正常的冠心病患者糖代谢状况,探讨冠心病合并糖耐量减低患者血浆纤溶酶原激活物抑制物1(PAI—1)、高敏C反应蛋白(hs—CRP)、糖化血红蛋白(HbA1c)水平冠脉病变的关系。方法:对冠脉造影确诊的226例冠心病患者行口服葡萄糖耐量试验,据结果分成糖耐量正常(NGT)组,糖耐量减低(IGT)组和2型糖尿病(T2DM)组,分析糖代谢状况,测定三组的血PAI—1,hs—CRP,HbA1c水平冠脉病变积分。结果:共发现糖代谢异常者120例(53.1%) ;血PAI—1,hs—CRP,HbA1c水平冠脉病变积分在IGT 和T2DM组比NGT组明显升高(P 0.05) ;相关分析显示,冠心病合并IGT组血PAI—1,hs—CRP,HbA1c水平冠状动脉病变积分呈正相关,相关系数分别为r =0.6082(P 0.01)、0.4443(P 0.05)、0.6327(P 0.01)。结论 :空腹血糖正常的冠心病患者糖代谢异常发生率高;冠心病合并IGT者冠脉病变严重,多支冠脉病变发生率高,病变呈弥漫性狭窄;血浆PAI—1,hs—CRP,HbA1c水平冠状动脉病变严重程度有关。

【关键词】 冠状动脉疾病 糖耐量减低 纤溶酶原激活物抑制物1 高敏C反应蛋白 糖化血红蛋白 冠状动脉造影。

Abstract: Objective: To investigate the glucose metabolism status in coronary heart disease patients with normal fasting blood sugar levels and research on the relationship between the levels of plasminogen activator inhibitor—1 (PAI—1), high—sensitive g—reactive protein (hs—CRP), glycosylated hemoglobin a1c (HbA1c) and coronary artery lesions in coronary heart disease patients with abnormal glucose tolerance. Methods: OGTT was performed in 226 cases who were confirmed coronary heart disease with coronary angiography,according to the oral glucose tolerance test (OGTT) results、Patients were divided into 3 groups, which included NGT group with normal fasting blood sugar level, IGT group with impaired glucose tolerance, and T2DM group with type 2 diabetes mellitus. PAI—1, hs—CRP, HbA1c were checked and the coronary narrow degree integral was calculated in all of the patients. Results: 120 cases of abnormal glucose metabolism (53.1%) were found. Plasma PAI—1、hs—CRP、HbA1c levels and coronary narrow degree integrals were higher in both IGT group and T2DM group than that in NGT group (P 0.05). Correlative analysis showed that plasma PAI—1、hs—CRP、HbA1c levels in coronary heart disease cases with IFG were positively correlated with the coronary narrow degree integrals(Gensini scores). Correlation coefficient was r =0.6082 (P 0.01),0.4443 (P 0.05) and 0.6327 (P 0.01),respectively. Conclusion: The coronary multivessel lesions, severe lesions and diffuse stenosis are more frequent in coronary heart disease patients with IGT. The correlation between the plasma PAI—1,hs—CRP,HbA1c levels and the severity of coronary artery lesions can reflect the severity of coronary artery lesions.

Key words: coronary heart disease;impaired glucose tolerance;glucose tolerance test;plasminogen activator inhibitor—1;High—sensitive C—reactive protein;hemoglobin A1c;coronary angiography。

目前对冠心病合并糖尿病患者冠脉病变特点的研究较多。近年来还发现在空腹血糖正常的糖耐量减低(IGT)阶段就已发生冠状动脉血管损伤[1]。但对该阶段冠心病患者冠脉病变特点和血浆PAI—1,hs—CRP,HbA1c之间的相关性报道并不多见,本研究通过分析空腹血糖正常冠心病患者的糖代谢特点以及上述因子与冠脉病变相关性,揭示其在冠心病发生、发展中的意义,以期引起人们的重视。

1 资料和方法。

1.1 病例及分组 连续入选226例2006年2月—2008年2月在我院住院并经选择性冠脉造影确诊的冠心病患者。入院后次日清晨行OGTT,经肘静脉采血测定血浆葡萄糖水平,根据1999年WHO标准[2]分成3组,糖耐量正常(NGT)组106例,糖耐量减低(IGT)组70例,2型糖尿病(T2DM)组50例。三组临床资料、生化指标差异无显著性,见表1。排除2周内发生脑血管意外、心肌梗死、感染、外伤、手术者,排除近3月内用过调脂药物者,排除肝、肾功能异常者,排除已知2型糖尿病、自身免疫性疾病、慢性甲状腺和胰腺疾病,排除合并其他心肺疾病者。

1.2 方法 清晨空腹采肘静脉血5 mL,2 h内离心(3 000 r/min,10 min)取血清分管置于—70℃冰箱中备用。hs—CRP用免疫散射比浊法检测(美国Beckman公司IMMAGE蛋白分析系统及配套试剂),PAI—1活性以发色底物法测定(试剂盒由上海太阳生物技术公司提供)。HbA1c采用日本Tosoh Glycohemoglobin Analyzer测定。血糖测定采用葡萄糖氧化酶法。血脂用全自动生化分析仪测定。冠脉狭窄程度的判断采用血管直径法:血管直径狭窄50%为冠心病狭窄长度:10 mm为局限性狭窄,10~20 mm之间为管状狭窄,20 mm为弥漫性狭窄;按病变所累及的血管支数分单支血管病变、双支病变、三支病变,严重左主干病变记为双支病变冠脉病变根据Gensini评分[3]由固定专人计算,以积分和表示。具体标准为:管腔狭窄1%~25%为1分,26%~50%为2分,51%~75%为3分,76%~90%为8分,91%~99%为16分,100%为32分。

1.3 统计学处理方法 计量资料进行方差齐性检验,方差齐性资料多组间比较采用方差分析,两组间比较用LSD—t法检验。计数资料以例数及百分率表示,组间比较采用x2检验。并用直线相关方法进行相关分析。

2 结果。

2.1 与NGT组比较,IGT组患者冠脉病变呈现弥漫性狭窄、多支病变发生率高的特点,且血PAI—1,hs—CRP,HbA1c水平冠脉病变积分均明显升高(P 0.01)。而T2DM组与IGT组组间差异无显著性(P 0.05),见表2、表3。

2.2 直线相关分析显示,冠心病合并IGT组血PAI—1,hs—CRP,HbA1c水平冠状动脉病变积分呈正相关,相关系数分别为r=0.6082(P 0.01)、0.4443(P 0.05)、0.6327(P 0.01)。

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