高血糖人群早期血管功能改变及相关因素探讨

目的采用血管外超声技术及动脉硬化测定仪评价高血糖人群早期血管功能的改变,并探讨其相关影响因素。方法选取糖耐量异常者45例,新诊断的T2DM者40例,除外心脑血管疾病及其他疾病。另选取健康体检者30名作为对照组。分别测量身高、体重、血压,检测空腹血糖、餐后血糖、血脂、脂联素、内皮素,应用高分辨率超声检测肱动脉对反应性充血的舒张反应,应用动脉硬化测定仪测定其脉搏波传导速度,比较3组人群各项指标差异,并分析其相关性。结果糖尿病及糖耐量异常人群均出现脉搏波传导速度的加快[（1380±266）cm／s、（1655±336cm／s）]和血流介导的内皮依赖性血管舒张反应异常（8．01％±5．82％、4．97％±5．83％）;脉搏波传导速度与内皮依赖性血管舒张反应、收缩压、脉压及空腹餐后血糖、内皮素呈正相关（r＝0．743,0．762,0．807,0．759,0．774,0．790）,与脂联素呈负相关（r＝-0．822）。结论糖尿病前期人群及糖尿病早期即有血管内皮功能障碍存在;内皮依赖性血管舒张功能和脉搏波传导速度与脂联素和内皮素相关。     

健康人不同部位脉搏波传导速度、反射波增强指数之间的相关性及影响因素

目的 研究颈-股动脉脉搏波传导速度(CF-PWV)、颈-桡动脉脉搏波传导速度(CR-PWV)、颈-踝动脉脉搏波传导速度(CA-PWV)以及反射波增强指数(AI)之间的相关性及影响因素.方法 一项北京市海淀、大兴区社区人群调查研究,样本数5116名,从中筛选出健康者729名(男413名,女316名),年龄17～85岁,平均年龄(39.2±12.2)岁.采用自动PWV分析仪(Complior)测定不同部位PWV,采用桡动脉压力波分析仪(SphygmoCor,Sydney,Australia)测定AI.结果 简单、偏相关分析都显示各动脉节段PWV之间显著相关(均P＜0.01).简单相关分析AI与CR-PWV之间没有相关性(r=-0.072,P=0.053).偏相关分析AI与CR-PWV、CA-PWV间都没有相关性(r=0.024,P=0.528;r=0.068,P=0.070).多因素逐步回归分析显示:CF-PWV与年龄、收缩压和心率呈正相关,与女性呈负相关(R2=0.249).CR-PWV与舒张压呈正相关,与年龄和女性呈负相关(R2=0.155).CA-PWV与收缩压和年龄呈正相关,与脉压和女性呈负相关(R2=0.244).AI与年龄、舒张压、LDL-C和女性呈正相关,与心率、身高和血肌酐水平呈负相关(R2=0.536).结论 CA-PWV包含颈-股动脉节段,在一定程度上可替代CF-PWV作为大动脉僵硬度的指标.CR-PWV主要反映周围肌性动脉的僵硬度,与CF-PWV、CA-PWV不可相互替代.不同的血压组分(收缩压、舒张压和脉压)对CF-PWV、CA-PWV、CR-PWV有不同的影响.AI的影响因素较多,且与PWV的相关性较差,并不适合作为评价动脉僵硬度的敏感、可靠指标.     

Flow-mediated changes in pulse wave velocity: a new clinical measure of endothelial function.

AIMS: To test whether measuring hyperaemic changes in pulse wave velocity (PWV) could be used as a new method of assessing endothelial function for use in clinical practice. METHODS AND RESULTS: Flow-mediated changes in vascular tone may be used to assess endothelial function and may be induced by distal hyperaemia, while endothelium-mediated changes in vascular tone can influence PWV. These three known principles were combined to provide and test a novel method of measuring endothelial function by the acute effects of distal hyperaemia on upper and lower limb PWV (measured by a recently developed method). Flow-mediated changes in upper and lower limb PWV were compared in 17 healthy subjects and seven patients with stable chronic heart failure (CHF), as a condition where endothelial function is impaired but endothelium-independent dilator responses are retained. Corroborative measurements of PWV and brachial artery diameter responses to endothelium-dependent and -independent pharmacological stimuli were performed in a further eight healthy subjects. Flow-mediated reduction of PWV (by 14% with no change in blood pressure) was found in normal subjects but was almost abolished in patients with CHF. PWV responses appear to be inversely related to and relatively greater than brachial artery diameter responses. CONCLUSION: The method may offer potential advantages of practical use and sensitivity over conduit artery diameter responses to measure endothelial dysfunction.     

不同年龄段高血压患者的肾功能和动脉弹性关系研究

目的:探讨不同年龄段高血压患者肾功能水平与大动脉弹性之间的关系。方法:入选2008年10月至2010年10月安贞医院高血压科门诊及住院的高血压患者,通过MDRD公式估算肾小球滤过率(eGFR),评估肾功能,测定肱踝动脉脉搏波传导速度(baPWV)作为评估大动脉弹性功能的指标。对全部高血压病患者按照年龄分组,每10岁设为一组,共6组,比较不同年龄组之间eGFR与PWV的差异;并分别做eGFR和PWV与其他影响因素之间的简单相关分析。结果:437例患者(全部未服药),年龄20～77岁,eGFR与PWV在不同组之间比较和组间比较,差异均有统计学意义(F值分别为39.02和14.58,P<0.05)。eGFR水平与年龄、SBP、DBP、脉压、PWV及UA呈负相关(P<0.01);PWV水平与年龄、SBP、DBP及脉压呈正相关,与eGFR呈负相关,P<0.01。结论:不同年龄段高血压患者eGFR的降低和PWV增高是同等程度并行发生,二者之间关系密切。     

厄贝沙坦氢氯噻嗪对肱动脉内皮功能及颈动脉内膜中层厚度的影响

目的观察厄贝沙坦氢氯噻嗪对高血压患者肱动脉内皮功能及颈动脉内膜中层厚度的影响。方法选择2010年6月~2013年2月在徐州医学院附属医院老年科就诊的1级、2级原发性高血压患者137例,完成本研究127例,随机分为氢氯噻嗪组60例及厄贝沙坦氢氯噻嗪67例。2组患者每日晨起分别口服氢氯噻嗪25 mg及厄贝沙坦氢氯噻嗪1片,连续12个月。检测2组患者治疗前后血压、血脂、高敏C反应蛋白(hs-CRP)等指标,以及肱动脉内皮依赖性舒张功能(EDD)和颈动脉内膜中层厚度(IMT)的变化。结果与治疗前比较,氢氯噻嗪组和厄贝沙坦氢氯噻嗪组治疗后收缩压[(156.49±9.10)mm Hg vs.(126.37±8.12)mm Hg,(157.26±8.91)mm Hg vs.(124.46±8.07)mm Hg]、舒张压[(98.73±5.54)mm Hg vs.(77.65±5.42)mm Hg,(99.54±5.38)mm Hg vs.(76.36±5.71)mm Hg]均降低,差异具有显著统计学意义(P均0.01)。与治疗前比较,厄贝沙坦氢氯噻嗪组患者治疗后内皮依赖性舒张功能[(5.37±0.91)%vs.(6.79±1.08)%,P0.01]提高,颈动脉内膜中层厚度[(1.16±0.25)mm vs.(1.03±0.20)mm,P0.05]降低。与氢氯噻嗪组患者治疗后比较,厄贝沙坦氢氯噻嗪组患者治疗后内皮依赖性舒张功能[(5.56±0.99)%vs.(6.79±1.08)%,P0.01]提高,颈动脉内膜中层厚度[(1.15±0.19)mm vs.(1.03±0.20)mm,P0.05]下降。结论厄贝沙坦氢氯噻嗪降压的同时可以改善肱动脉内皮功能、减少颈动脉内膜中层厚度。     

肾性高血压患者腹膜透析前后大动脉脉搏波速度的比较

目的：通过对比腹膜透析前后肾性高血压患者脉搏波速度（PWV）变化,探讨腹膜透析治疗对于肾性高血压患者血管硬化的影响。方法对110例肾性高血压患者在进行腹膜透析前以及透析后3个月后的 PWV 进行测量,并结合血压等相关因素进行统计学分析。结果肾性高血压患者在经腹膜透析后,PWV 下降差异有统计学意义（P ＜0．05）,在进行腹膜透析前后,患者的血压改变没有统计学意义（P ＞0．05）。结论对于肾性高血压患者,进行腹膜透析能够控制动脉硬化的过程。腹膜透析延缓动脉粥样硬化机制除了降低 PMV 外,还存在其他因素。     

血压、脉压水平及高血压病程对高血压患者动脉僵硬度的影响

目的探讨血压、脉压水平及高血压病程对高血压患者动脉僵硬度的影响。方法从上海市宝山区6家社区卫生中心及本院入选1026例高血压患者,收集相关病史信息,检测其颈-股动脉(C-F)、颈-桡动脉(C-R)、颈-足背动脉(C-D)脉搏波传导速度(PWV),672例患者在随访1年后复测PWV。从血压、脉压、高血压病程3者的不同水平进行分组比较及随访前后对照分析。结果 (1)1、2、3级高血压患者的C-FPWV随血压水平的增高而增快,分别为(12.61±2.76)m/s,(14.35±3.41)m/s,(15.50±2.93)m/s(均为P<0.01)。1级高血压组较2级、3级高血压组C-FPWV差异有统计学意义(均为P<0.01)。(2)随访前后C-FPWV在1级和2级高血压组分别为(12.73±2.91)m/s和(13.39±3.25)m/s,(13.96±3.07)m/s和(14.75±4.10)m/s,差异有统计学意义,而在3级高血压组差异无统计学意义。(3)脉压<40 mm Hg,40～60 mm Hg,≥60 mm Hg 3组C-FPWV随脉压的增大而增快,分别为(11.95±2.60)m/s,(12.94±2.85)m/s,(14.89±3.22)m/s(均为P<0.01)。随访1年后3组的C-FPWV分别较前增快0.70 m/s,0.65 m/s,0.85 m/s,差异均有统计学意义。(4)高血压病程<5年、5～10年、≥10年3组C-FPWV分别为(12.77±2.75)m/s,(12.85±3.07)m/s,(13.76±3.05)m/s,3组比较差异有统计学意义(均为P<0.01),病程越长,C-FPWV越快。结论(1)C-FPWV较C-RPWV、C-DPWV更能反映动脉僵硬度的变化。(2)C-FPWV随血压、脉压水平的增高及高血压病程的延长而增快,3者均为动脉僵硬度的重要影响因素。     

不同糖耐量人群血管内皮功能及可溶性选择素P的变化

对33例NGT、30例IGT和30例T2DM应用超声测量其肱动脉内径（DBA），计算收缩期血压由200mmHg降为0时DBA增大所代表的内皮依赖性血管舒张功能（EDF）；测定可溶性选择素P和其他指标。结果显示：（1）EDF值，T2DM组低于IGT和NGT组，IGT组低于NGT组，差异有统计学意义。（2）IGT与T2DM组均显示：EDF值与HOMA-IR及可溶性选择素P呈显著负相关。     

冠心病患者糖代谢状态对脉搏波速度影响研究

目的 研究冠心病患者糖代谢状态对脉搏波速度(baPWV)的影响.方法 198例冠心病患者分为糖代谢正常(NGT)组、糖调节受损(IGR)组、糖尿病组,测定臂踝baPWV,并记录年龄、性别、冠心病危险因子、血脂、炎症因子等指标.结果 糖尿病组baPWV(1807±381)cm/s显著高于NGT组[(1615士248)cm/s,P=0.000]及IGR组[(1674±277)cm/s,P=0.035].多元逐步线性回归分析显示,年龄和高敏C反应蛋白(hsCRP)水平为总体baPWV独立影响因子.糖尿病组baPWV独立影响因子为年龄和糖化血红蛋白水平.结论 冠心病患者随着处于糖代谢状态的不同阶段(糖代谢正常、糖调节受损、糖尿病),baPWV有增快趋势,尤其是合并糖尿病的冠心病患者baPWV较NGT、IGR患者差异有统计学意义.血糖控制情况与动脉僵硬度相关.     

糖代谢紊乱患者的血管内皮细胞功能变化

目的 观察糖耐量受损（IGT）、2型糖尿病（DM）患者的内皮依赖性血管舒张功能（EDF）、血清超氧化歧化酶（SOD）、丙二醛（MDA）、超敏C反应蛋白（hsCRP）、可溶性血管细胞黏附分子1（sVCAM-1）的变化。方法 30例IGT患者、30例2型DM患者及33名正常对照者（NGT）纳入本研究。采集空腹静脉血测定葡萄糖（FPG）、胰岛素（FINS）、SOD、MDA、hsCRP、sVCAM-1，并行75g口服葡萄糖耐量试验。采用高分辨率血管外彩超测定肱动脉的血管内径，以肱动脉反应性充血前后血管内径变化百分比反映EDF。结果 （1）IGT组、DM组的EDF较NGT组显著下降（均P〈0．01），DM组较IGT组更低（P〈0．01）。（2）IGT组、DM组的SOD较NGT组显著下降（均P〈0．01），而MDA显著上升（均P〈0．01）。DM组与IGT组比较SOD显著下降（P〈0．01），MDA显著上升（P〈0．01）。（3）hsCRP、sVCAM-1在NGT、IGT、DM组逐渐上升，两两比较差异均有统计学意义（均P〈0．01）。（4）多因素逐步回归分析显示：EDF与HOMA—IR、hsCRP明显负相关（r分别为-0．059、-0．447，均P〈0．01，n=93）。结论 EDF的损害在IGT阶段即可出现，而在DM患者中损害更为严重。胰岛素抵抗、hsCRP与EDF的损害密切相关。SOD、MDA、hsCRP、sVCAM-1可能参与上述患者的血管内皮功能损伤。     

Effects of Amlodipine and Valsartan on Blood Pressure Variability and Pulse Wave Velocity in Hypertensive Patients

Objectives

Antihypertensive therapy is effective to control blood pressure (BP) and to prevent cardiovascular events, but the further treatment strategies for patients who cannot achieve goal BP with low-dose monotherapy is still under dispute. Our study investigates the effects of high-dose amlodipine and valsartan and their low-dose combination on blood pressure variability (BPV) and pulse wave velocity (PWV) to provide references for clinical medication.

高血压病患者颈-股动脉和颈-桡动脉脉搏波速度改变及其影响因素

目的探讨不同年龄和血压水平的高血压病患者颈-股动脉和颈-桡动脉脉搏波速度的改变及其影响因素。方法应用脉搏波速度(pulse wave velocity,PWV)自动测量系统测定颈-股动脉PWV(CFPWV)和颈-桡动脉PWV(CRPWV)分别作为反映中央弹性大动脉和外周中等肌性动脉弹性功能的指标,对517例高血压患者[其中男272例,女245例,年龄17~82岁,平均(52.0±13.0)岁]和118例健康人[其中男52例,女66例,年龄19~82岁,平均(54.2±13.8)岁]进行PWV检测。结果健康人和高血压病患者颈-股动脉PWV均随年龄增大而增加(P<0.001),而颈-桡动脉PWV无此变化趋势;颈-股动脉PWV和颈-桡动脉PWV均随血压水平升高而增高(P<0.001)。多元逐步回归显示,年龄和收缩压是影响颈-股动脉PWV的独立因素;舒张压是影响颈-桡动脉PWV的独立因素(各标准化回归系数P<0.001)。结论年龄和血压组分对高血压患者中央弹性大动脉和外周中等肌性动脉弹性功能的影响不同。对大动脉弹性功能改变的检测较外周中等动脉有更重要的临床价值。     

增强型体外反搏对高血压并糖耐量减低患者脉搏波传导速度及血管内皮功能的影响

目的探讨增强型体外反搏（EECP）治疗对高血压并糖耐量减低（IGT）患者肱踝脉搏波传导速度（b8PWV）及血管内皮功能的影响。方法38例高血压并IGT患者分为常规治疗组（CT,20例）和常规治疗＋EECP组（CT＋EECP,18例）。CT＋EECP组隔天反搏治疗2h,总共反搏36h,共36d。分别于体外反搏前和反搏后检测baPWV,同时检测血浆内皮素（ET）、一氧化氮（NO）.结果CT组和CT＋EECP组治疗后baPWV明显下降,分别为1703±213（P〈0．05）和1601±208（P〈0．01）,两组比较差异有统计学意义（p〈0．05）.两组患者经治疗后ET均明显下降（74．8±21．3和62．6±20．8,P〈0．05,P〈0．01）,NO均明显上升（67．7：1：17．4和78．2±18．2,P〈0．05,P〈0．01）.CT＋EECP组baPWV和ET下降更为显著,下降幅度与常规治疗组比较差异有统计学意义（P〈0．05）。结论增强型体外反搏可改善高血压并IGT患者血管内皮功能,降低血管僵硬度,从而改善动脉弹性。     

Effects of exercise training on endothelial function in individuals with hypertension: a systematic review with meta-analysis

A slight increase (1%) in endothelial function is associated with reduction of cardiovascular risks by 13% in individuals with cardiovascular disease risk, including those with hypertension. Thus, we conducted a systematic review and meta-analysis to assess the efficacy of exercise training on endothelial function in individuals with hypertension.We included randomized clinical trials (RCTs) with adult participants diagnosed with hypertension undergoing exercise training (≥4 weeks), and the primary outcome was endothelial function, measured by flow-mediated dilatation (FMD). Five studies comprising a total of 362 participants (252 exercise and 110 controls; 59.3 years old, ranged from 52.0 to 67.2 years) were included in the meta-analysis. The pooled mean estimate indicated increased FMD after exercise training of 1.45 (P = .001), and 95% confidence interval ?0.11 to 3.00 compared with control comparators. The studies were characterized by significant heterogeneity (χ² = 23.34, P < .001, I² = 70%). The present results are consistent with the notion that aerobic exercise training elicits favorable adaptations in endothelial function in individuals with hypertension. However, more studies are needed to make more definitive conclusions.     

A pilot study of endothelial dysfunction and aortic stiffness after interleukin-6 receptor inhibition in rheumatoid arthritis

Interleukin (IL)-6 is a pleiotropic proinflammatory cytokine involved in the pathogenesis of both atherosclerosis and rheumatoid arthritis. The role of the IL-6/IL-6 receptor pathway in the documented acceleration of atherosclerosis in rheumatoid arthritis has not been examined. In a non-randomized prospective pilot study we asked whether endothelial dysfunction, defined as impaired flow mediated dilatation (FMD), and aortic stiffness, assessed by pulse wave velocity (PWV) improve after 3 and 6 monthly therapeutic infusions of the anti-IL-6 receptor antibody tocilizumab for active rheumatoid arthritis. We found that FMD increased from 3.3 ± 0.8 to 4.4 ± 1.2 to 5.2 ± 1.9% (p = 0.003), whereas PWV decreased from 8.2 ± 1.2 to 7.7 ± 1.3 to 7.0 ± 1.0 m/s (p < 0.001). Whether these beneficial arterial changes are direct effects of the IL-6/IL-6 receptor pathway inhibition, maintained over time and translate into better clinical outcome warrants further studies.     

脉搏波传导速度与心血管病及其危险因素的相关性分析

目的探讨老年人群脉搏波速度（PWV）与心血管病及危险因素的相关性。方法采用整群抽样方法纳入≥70岁人群1701例,进行问卷调查、体格检查和实验室检验,测量颈-股动脉脉搏波速度（cfPWV）,观察cfPWV与高血压及相关危险因素的关系。结果 cfPWV水平随血压水平升高而升高,在高血压、脑卒中、心肌梗死和糖尿病患者中cfPWV明显高于正常人群,差异有统计学意义。多元逐步回归分析显示在入选者和脑卒中、心肌梗死和糖尿病人群中,年龄、男性、平均动脉压、心率、胰岛素抵抗指数（Homa IR）与cfPWV呈正相关（P〈0.001）,体重指数与cfPWV负相关。结论在老年人群中,cfPWV与高血压及心血管病危险因素密切相关。     

123例飞行员臂踝脉搏波传导速度测定及相关因素分析

目的探讨飞行员臂踝脉搏波传导速度（BaPWV）的情况及其相关影响因素。方法 123例飞行员分为〈30岁、30~39岁及≥40岁3组,测定BaPWV同时确定飞行员身高、体质量、体质量指数（BMI）、收缩压、舒张压、脉压、飞行时间、是否吸烟等。对比各年龄段吸烟组与非吸烟组BaPWV,分别计算BaPWV与年龄、飞行时间、BMI、收缩压、舒张压、脉压的直线相关系数。结果 〈30岁和30~39岁飞行员吸烟组BaPWV与非吸烟组比较无统计学差异（P〉0.05）;≥40岁飞行员吸烟组BaPWV较非吸烟组升高（P〈0.05）;BaPWV与年龄、飞行时间、收缩压、舒张压、脉压、BMI呈正相关（P〈0.05）。结论 40岁以上飞行员吸烟组与非吸烟组BaPWV存在显著差异,脉压、收缩压、飞行时间、年龄、舒张压、BMI与BaPWV显著相关。     

The association between cerebral atherosclerosis and arterial stiffness in acute ischemic stroke

Objective

Arterial stiffness is associated with cardiovascular risk factors and atherosclerosis. Measurement of pulse wave velocity (PWV) is one of the most representative and noninvasive techniques for assessing arterial stiffness. We investigated the association of cerebral atherosclerosis with brachial-ankle PWV (baPWV) in acute ischemic stroke patients. If present, we sought to determine whether the relationship differed between atherosclerosis in the intracranial artery and atherosclerosis in the extracranial artery.

Methods

We included 801 patients with acute ischemic stroke who had undergone angiographic study and baPWV measurement between January 2007 and May 2010. Patients with cerebral artery atherosclerosis were categorized into those with intracranial atherosclerosis, those with extracranial atherosclerosis and those with both intracranial and extracranial atherosclerosis. We determined factors that were associated with baPWV.

Results

Univariate and multivariate analyses showed that high baPWV was significantly associated with older age, lower body mass index, higher brachial systolic pressure, and diabetes mellitus. Increased baPWV was associated with the presence of atherosclerosis (≥50% stenosis) in the intracranial cerebral artery as well as in both the intracranial and extracranial arteries, but not with atherosclerosis in the extracranial cerebral artery. The burden of intracranial cerebral atherosclerosis, which was assessed based on the number of arteries with atherosclerosis, was also closely associated with baPWV.

Conclusion

Arterial stiffness was associated with the presence and burden of intracranial cerebral atherosclerosis in stroke patients, but was not associated with the extracranial cerebral atherosclerosis. These findings suggest a potential pathophysiological association between increased arterial stiffness and intracranial cerebral atherosclerosis.     

外周血管内皮功能、炎症因子与冠状动脉粥样硬化性心脏病的关系

目的研讨外周血管内皮功能、炎症因子与冠状动脉粥样硬化性心脏病(冠心病)的相关性。方法纳入疑似冠心病受试者95例,经冠状动脉造影(coronary angiography,CAG)分为冠心病组(n=51)即CAG阳性及对照组(n=44)即CAG阴性,对入选患者进行肱动脉血流介导的血管舒张功能(flow-mediated dilatation,FMD)及硝酸甘油依赖的血管扩张(nitroglycerin-mediated dilatation,NMD)检测。并检测血液中炎症因子指标:超敏C-反应蛋白、白细胞介素-2、白细胞介素-4、白细胞介素-6、白细胞介素-10及肿瘤坏死因子-α、干扰素-γ。结果 (1)冠心病组FMD明显低于对照组,差异有统计学意义(4.13%±3.67%vs.6.52%±4.58%,P=0.006);两组NMD比较,差异无统计学意义(17.7%±0.76%vs.16.9%±6.61%,P=0.59)。(2)两变量关联性分析示FMD与吸烟(r=-0.2860,P=0.002)、原发性高血压(r=-0.177,P=0.043)、尿酸(r=-2.2,P=0.016)、冠状动脉病变(r=-0.31,P=0.001)呈负相关性;与性别(r=0.193,P=0.03)、高密度脂蛋白(r=0.175,P=0.045)呈正相关性。(3)多重线性回归分析示冠状动脉病变与FMD呈负相关性(β=-1.011,P=0.001,t=-3.277)。冠心病组白细胞介素-2浓度高于对照组,差异有统计学意义[(4.15±0.34)pg/m L vs.(3.98±0.42)pg/m L,P=0.03]。结论肱动脉FMD在冠心病预测、诊断上有一定临床应用价值,在反映冠状动脉病变上有一定的参考价值。     

血管内皮功能与血糖、胰岛素水平及心血管危险因素的相关性

目的 研究超重肥胖者血管内皮功能与血糖、胰岛素水平及心血管病危险因素的关系。方法 367例超重肥胖者被分成2型糖尿病组、糖耐量减低组、空腹血糖受损组、正常糖耐量组及单纯超重肥胖组，并与66例正常体重者对照。测定血管内皮依赖性舒张功能(血流介导)和内皮非依赖性舒张功能(硝酸甘油介导)，并测定体脂、血压、血糖、血脂和胰岛素抵抗指数(HOMA-IR)。结果 超重肥胖者的内皮依赖性舒张功能显著降低，合并代谢异常者降低更显著。血管内皮依赖性舒张功能与腰臀比、收缩压、HOMA-IR呈显著负相关。结论 超重肥胖者血管内皮功能受损，腰臀比、收缩压及HOMA—IR是影响内皮功能的主要因素。