Assessment of potential relationship between wall shear stress and arterial wall response after bare metal stent and sirolimus-eluting stent implantation in patients with diabetes mellitus

BACKGROUND: Wall shear stress (WSS) has been associated with neointimal hyperplasia (NIH) following bare metal stent (BMS) implantation. Drug-eluting stents (DES) almost abolish NIH. Conversely, diabetes mellitus amplifies NIH response. The association between WSS and arterial wall response following DES and BMS implantation in diabetic patients remains to be evaluated. METHODS: The study involved 20 diabetic patients randomized to BMS (n = 9) or sirolimus-eluting stent (SES; n = 11) implantation in native coronary arteries. A computational fluid dynamic model applied 3D intravascular ultrasound (IVUS) and two-plane angiographic to measure WSS (Pa). IVUS assessments were performed post-procedure and at 9-months follow-up. The target segment encompassed the stent plus 5 mm distal and proximal edges. A total of 93 subsegments were evaluated: in-stent segments divided in three subsegments (proximal, mid and distal; n = 60) and proximal and distal edges (n = 33). RESULTS: Stent length was similar between BMS (17.4 +/- 7.3 mm) and SES (19.8 +/- 6.8 mm) groups. NIH was observed in all BMS subsegments (n = 27) versus one subsegment in the SES group (n = 33). WSS ranged from 0.52 to 4.20 Pa in the BMS and from 0.42 to 3.06 Pa in the SES group. There was no correlation between WSS and NIH in either stent group. In addition, there were no correlation between the change of external elastic membrane (EEM) or plaque growth at the edges and WSS. CONCLUSION: WSS was not associated with NIH after implantation of SES or BMS in diabetic patients. Plaque growth or the change of EEM at the edges were not associated with WSS either.     

老年人冠状动脉裸金属支架植入术后冠脉造影及临床随访观察

目的观察老年人冠脉裸金属支架(bare metal stent,BMS)术后冠脉造影随访结果及临床事件。方法冠心病患者在成功冠脉内裸金属支架术后患者进行冠状动脉造影随访复查,根据患者年龄分为≥60岁的老年组及<60岁的非老年组,对两组支架植入术后冠脉造影随访资料及临床资料进行对比分析。结果老年组89名患者共植入121个裸金属支架,非老年组53例患者植入71个。两组在病变类型、狭窄程度、残余狭窄、支架长度、直径间差异无统计学意义。随访期间老年组与非老年组分别有心力衰竭10例(11.2%)与1例(1.9%)(P<0.05)。冠脉造影发现,两组分别有47个及24个支架发生支架内再狭窄,分别为38.8%及33.8%(P>0.05),再狭窄类型在两组间差异无统计学意义。老年组及非老年组中有新病变或病变进展者非别为22例(24.7)%及23例(43.4%)(P<0.05)。结论老年人成功冠脉裸金属支架植入术后,冠脉造影随访发现支架内再狭窄发生率与非老年人相似,但发生心力衰竭者明显高于非老年人。     

Long-term outcome after drug-eluting stent implantation in comparison with bare metal stents: a single centre experience

Background  

The aim of our study was to evaluate the effect of drug-eluting stents (DES) compared with bare-metal stents (BMS) on all-cause mortality and target vessel revascularization (TVR) in a “real-world” clinical setting.     

药物洗脱支架与金属支架生物相容性比较及支架置入后的血管再狭窄

药物洗脱支架与裸金属支架相比,最大的改进就是在原有裸金属支架平台上,增加了药物载体和药物.虽然冠状动脉支架的成功率和安全性有了提高,但是再狭窄仍然足限制支架应用的一个障碍.药物洗脱支架置入后的过敏反应已有报道.文章在药物洗脱支架与普通金属裸支架的生物相容性比较分析的基础上,对药物洗脱支架置入后的再狭窄进行了临床研究,探讨了支架再狭窄产生的原因并从临床实例角度综合研究了药物洗脱支架置入后再狭窄的新进展与启示.     

Changes in pro-oxidant-antioxidant balance after bare metal and drug eluting stent implantation in patients with stable coronary disease

ObjectivesIn this study we aimed to assess the changes in pro-oxidant–antioxidant balance (PAB) after the placement of either a drug-eluting-stent (DES) or bare-metal-stent (BMS) in patients with stable coronary artery disease.Design and methodsPercutaneous coronary interventions (PCI) with either BMS or DES were undertaken for 152 patients (82 in the BMS and 70 in the DES groups respectively). PAB values were measured 24 h before and after PCI.ResultsBaseline PAB values were 80.68 (64.98–99.37) and 98.86 (64.70–140.62) for BMS and DES group, respectively, which were not significantly different between the 2 groups (P > 0.05). Following PCI, median PAB values decreased to 72.10 (61.40–96.13) and 81.40 (54.15–121.90) in BMS and DES groups, respectively. The reduction was significant in both BMS and DES groups (P < 0.05). The changes in PAB values were ?2.81 (?12.76 to 2.31) for BMS and ?2.82 (?29.88 to 8.93) for DES group, which were not significantly different between the 2 groups (P > 0.05).ConclusionWe found that the reported difference in clinical outcomes following DES or BMS implantation cannot be attributed to differences in early changes in oxidative stress induction as assessed by changes in PAB values.     

冠状动脉支架置入后相关炎症因子的变化及其干预

背景:冠状动脉粥样硬化性心脏病支架置入治疗后的炎症反应以及其严重程度与再狭窄明显存在相关性,医学工作者试图从中寻找新思路预防支架置入后再狭窄,提高治疗质量.目的:评价各种干预措施以及监测手段在冠状动脉置入术后炎症治疗中的应用价值和临床前景.方法:电子检索EMbase(1980-01/2011-05),MEDLINE(1966-01/2011-05),中国生物医学文献数据库(CBM,1978/2011-05)和中国期刊全文数据库(CNKI),筛查相关文章的参考文献.中文检索词冠状动脉支架,炎症因子,炎症,CRP,再狭窄,英文检索词为Coronary stent,inflammatory cytokines,inflammation,CRP,restenosis.结果与结论:临床试验结果显示支架置入后炎症反应明显加重,使用雷帕霉素药物洗脱支架,添加地塞米松、塞来昔布、瑞舒伐他汀等可更大程度上降低支架置入后炎症反应.动物试验发现使用雷帕霉素洗脱支架可减少支架置入段新生内膜的形成和缩小炎症面积.提示各种干预措施可降低支架置入后炎症反应从而降低远期再狭窄的发生,可进一步改良加以应用于临床观察其疗效.     

冠状动脉支架置入后相关炎症因子的变化及其干预

背景：冠状动脉粥样硬化性心脏病支架置入治疗后的炎症反应以及其严重程度与再狭窄明显存在相关性,医学工作者试图从中寻找新思路预防支架置入后再狭窄,提高治疗质量。目的：评价各种干预措施以及监测手段在冠状动脉置入术后炎症治疗中的应用价值和临床前景。方法：电子检索EMbase（1980-01/2011-05）,MEDLINE（1966-01/2011-05）,中国生物医学文献数据库（CBM,1978/2011-05）和中国期刊全文数据库（CNKI）,筛查相关文章的参考文献。中文检索词＂冠状动脉支架,炎症因子,炎症,CRP,再狭窄＂,英文检索词为＂Coronary stent,inflammatory cytokines,inflammation,CRP,restenosis＂。结果与结论：临床试验结果显示支架置入后炎症反应明显加重,使用雷帕霉素药物洗脱支架,添加地塞米松、塞来昔布、瑞舒伐他汀等可更大程度上降低支架置入后炎症反应。动物试验发现使用雷帕霉素洗脱支架可减少支架置入段新生内膜的形成和缩小炎症面积。提示各种干预措施可降低支架置入后炎症反应从而降低远期再狭窄的发生,可进一步改良加以应用于临床观察其疗效。     

冠状动脉内药物洗脱支架或金属裸支架置入对患者血小板功能的影响

背景:冠状动脉内置入药物洗脱支架可以显著降低冠状动脉介入治疗后再狭窄的发生率和主要心血管不良事件,提高患者的生活质量,在临床得到了广泛应用.但近期的多项荟萃分析说明,与金属裸支架相比,药物洗脱支架显著增加晚期支架血栓形成,增加全因性死亡率.目的:观察冠状动脉支架置入前、后和随访6个月血小板膜糖蛋白的变化,对比分析短、中期内置入药物洗脱支架或金属裸支架对血小板活化影响的差异.方法:对2007-06/2009-06因急性冠脉综合征成功进行冠状动脉内支架置入治疗的104例患者进行回顾性分析,其中使用药物洗脱支架68例,金属裸支架36例.同时纳入34例因疑诊急性冠脉综合征而进行造影,证实血管完全正常的患者为对照组.比较各组患者外周血中CD62p,CD63和凝血酶敏感蛋白的阳性表达率.结果与结论:在相同抗血小板治疗6个月时,与金属裸支架组相比,药物洗脱支架置入对患者血小板活化的影响仍较明显,这可能与药物洗脱支架的晚期支架血栓形成增加有关.目前所提倡的12个月的标准抗凝治疗是否足够,以及血小板活化功能检测对支架置入治疗后抗血小板治疗的临床指导意义等仍需进一步研究.     

国产雷帕霉素洗脱支架在急性心肌梗死直接经皮冠状动脉介入治疗中的应用

目的评价国产雷帕霉素洗脱支架（SES）在ST段抬高型急性心肌梗死（AMI）直接经皮冠状动脉介入治疗（PCI）中应用的安全性和有效性。方法2005年1月至2006年3月期间在复旦大学附属中山医院行直接PCI的204例ST段抬高型AMI患者中,共143例接受国产SES（Firebird支架）或BMS植入的患者纳入本研究。其中,植入国产SES者74例,植入BMS者69例。对两组患者术后30天和180天的主要心血管不良事件（MACE）（包括死亡、非致死性再梗和靶血管再次血运重建[TVR]）进行随访和对比分析。计量资料数据以student＇s非配对t检验比较组间差别,计数资料数据以Fisher＇s检验比较组间差别。采用COX回归比例风险模型对不良事件的发生进行多因素分析。以P〈0．05为差异具有统计学意义。结果国产SES组和BMS组的手术成功率无统计学意义（94．6％vs94．2％,P=1．0）。术后30d内,国产SES组和BMS组的MACE发生率无统计学意义（5．4％vs11．6％,P=0．23）,BMS组发生1例冠脉造影证实的早期支架内血栓而国产SES无1例发生（0vs1．4％,P=0．48）。术后180d随访,国产SES植入较BMS植入能明显减少MACE的发生（6．8％vs20．3％,相对危险比为0．32,95％可信限为0．11～0．88,P=0．03）,这主要归因于SES组TVR的显著降低（0vs14．5％,P〈0．001）。术后30d至180d,两组无1例发生晚期支架内血栓形成。结论国产SES应用于ST段抬高型AMI具有良好的安全性,与传统的BMS相比,并不增加支架内血栓的发生率,而且能明显减少AMI患者的TVR发生率,改善患者的远期预后。     

Inhibition of neointimal proliferation after bare metal stent implantation with low-pressure drug delivery using a paclitaxel-coated balloon in porcine coronary arteries

A variety of mechanical and laser-based methods remove or shift atherosclerotic plaques and reopen the artery to its original lumen. Subsequent treatment with drug-coated balloons (DCB) may smooth the vessel wall but does not require high-pressure inflation. We investigated the efficacy of paclitaxel-coated balloons inflated with only 2 atm after bare metal stent implantation in coronary arteries of 24 pigs. Angiography and histomorphometry was performed on day 28. DCB inflated with 2 atm caused similar reduction of late lumen loss (LLL) as high-pressure inflation with 12 atm (0.89 ± 0.58 vs. 0.72 ± 0.39 mm, p = 0.34). Both DCB treatments significantly (p < 0.01) reduced LLL versus uncoated balloons (1.50 ± 0.51 mm). Treatment with low-pressure DCB resulted in less maximal intimal thickness (0.45 ± 0.15 vs. 0.67 ± 0.25 mm) and neointimal area (2.93 ± 0.73 vs. 3.82 ± 1.27 mm²) than treatment with uncoated balloons (p < 0.05). In conclusion, low-pressure treatment with DCB was similarly effective as high-pressure treatment justifying clinical trials in vessels which will benefit from inhibition of neointimal proliferation but may not tolerate high inflation pressure.     

Assessment of the relation between IVUS measurements and clinical outcome in elderly patients after sirolimus-eluting stent implantation for de novo coronary lesions

This study aimed to evaluate the impact of vascular response assessed by intravascular ultrasound (IVUS) imaging on clinical outcomes in elderly patients (≥75?years) undergoing percutaneous coronary intervention (PCI) for de novo lesions with sirolimus-eluting stent (SES) implantation. Repeat coronary angiography with IVUS was performed 1?year after SES-based PCI for de novo lesions in 136 elderly patients (≥75?years) and 427 younger counterparts (<75?years) (219 lesions and 635 lesions, respectively). Major adverse cardiac events (MACE) including cardiac death, non-fatal myocardial infarction, and target lesion revascularization (TLR) during 2-year follow-up were recorded. Despite similar angiographic in-stent restenosis and TLR and IVUS-detected incomplete stent apposition (ISA), absolute intimal hyperplasia and percentage of volumetric obstruction were lower in elderly than in younger patients. At 2-year follow-up, cumulative survival freedom from composite death and myocardial infarction or MACE was significantly reduced in elderly patients, but very late stent thrombosis was similar in the two groups. Cox proportional hazards model identified age, diabetes, left ventricular ejection fraction, lesion length,minimal stent cross-sectional area and plaque progression as independent predictors of non-fatal myocardial infarction or mortality. In elderly patients undergoing SES-based PCI, despite similar TLR, neointimal hyperplasia was significantly lower than in younger patients. IVUS measurements except for minimal stent cross-sectional area did not correlate with stent thrombosis and clinical outcomes at 2?years.     

金属裸支架与国产药物洗脱支架置入冠状动脉长病变后的血管重建及生物相容性效应

目的:对比国产雷帕霉素药物洗脱支架(firebird火鸟)和金属裸支架置入冠状动脉长病变血管后的安全性、生物相容性及血管重建作用.方法:选取2005-07/2007-07抚顺矿务局总医院行支架置入治疗冠状动脉长病变(单根血管病变长度≥20mm)患者215例为观察对象.置入药物洗脱支架134例,置入金属裸支架81例.支架均由微刨医疗器械(上海)有限公司提供.置入者为本科从事冠状动脉介入治疗≥10年的副丰任医师.根据病变血管近端及远端血管直径,按1:1比例选择支架,支架长度以超过病变两端3～5 mm为准,置入术中经动脉鞘管注入肝素5 000 U,术后腹壁皮下注射低分子肝素钙0.4 mg共3 d,大部分患者使用球囊进行预扩张.冠状动脉造影定量分析支架内或支架临近血管(5 mm)管腔直径狭窄程度＞50%为血管造影再狭窄.结果:共215例患者238处靶病变完成冠状动脉造影检查随访.①术后1个月复查血常规,凝血相检查,无一例出现造血系统细胞成份、数目、形态不良改变.②随访造影显示无一例支架松脱、移位;无一例血管局部增生反应.③对影响长病变支架再狭窄因素的logistic回归分析发现,支架类型是对长病变支架内再狭窄影响最大的危险因素.④置入后6个月随访置入药物洗脱支架组再狭窄率为15.49%,置入金属裸支架组再狭窄率为47.92%,两组比较差异有显著性意义(P＜0.001),药物洗脱支架组靶病变血管重建率、置入支架后扩张的比例要明显好于金属裸支架组(P＜0.001).结论:国产雷帕霉素药物洗脱支架(firebird火鸟)在置入冠状动脉长病变后无特殊生物相容性反应,在降低再狭窄率及血管重建方面优于金属裸支架.     

药物洗脱支架与裸支架置入治疗冠心病的安全性及生物相容性比较

药物洗脱支架与裸金属支架相比,最大的改进就是在原有的裸金属支架平台上,增加了药物载体和药物.药物洗脱支架的药物载体主要是多聚物涂层,其目的是用于承载足够的药量,并在药物洗脱支架置入人体后能有效控制药物的分解、扩散和释放.在临床治疗中,聚合物载体的生物相容性及完整性会影响到药物洗脱支架的安全性,而聚合物载体对药物的控释性则影响到药物洗脱支架有效性.从目前的发展趋势来看,涂层药物要具备保护内皮的功能,在最大程度上保持支架表面的光滑度,从而提高支架的生物相容性,使支架平台和多聚载体可吸收、药物释放体系更科学,将是未来药物洗脱支架的发展方向.     

冠心病患者国产与进口雷帕霉素支架置入后早期康复训练对炎性反应的影响

背景：冠心病患者支架置入后24h可见血清炎症因子水平升高,但支架置入后长期的血清炎症因子水平变化报道尚不多见。目的：观察冠心病国产雷帕霉素药物洗脱支架（Partner支架）和进口雷帕霉素药物洗脱支架（Cypher）置入后早期康复训练对血清炎症因子及患者生活质量的影响。方法：收集辽宁医学院附属第三医院2007-01/2009-12心内科介入支架治疗急性心肌梗死患者108例。根据病变及经济情况将患者分为Partner组（n=58）和Cypher组（n=50）。征询患者及家属意见,对部分患者进行早期康复训练,Partner组和Cypher组分别为34例和28例,所有患者于支架置入前、置入后3,5周抽取空腹静脉血,检测血清白细胞介素18,C-反应蛋白,肿瘤坏死因子α水平。置入后5周应用WHOQOL-BRIEF量表评估患者生活质量。结果与结论：未进行康复训练的Cypher组患者血清白细胞介素18,C-反应蛋白和肿瘤坏死因子α水平在置入前和置入后3,5周与未康复训练＋Partner组相比,差异无显著性意义（P〉0.05）。患者支架置入后5周,康复训练＋Partner/Cypher组患者世界卫生组织的简明QOL测定表评分均明显高于对应的未进行康复训练组（P〈0.05）。提示进行康复训练对2种支架置入的冠心病患者血清炎症因子水平无明显影响,但却对患者生活质量有明显改善作用。     

冠心病患者国产与进口雷帕霉素支架置入后早期康复训练对炎性反应的影响

背景:冠心病患者支架置入后24 h可见血清炎症因子水平升高,但支架置入后长期的血清炎症因子水平变化报道尚不多见.目的:观察冠心病国产雷帕霉素药物洗脱支架(Partner支架)和进口雷帕霉素药物洗脱支架(Cypher)置入后早期康复训练对血清炎症因子及患者生活质量的影响.方法:收集辽宁医学院附属第三医院2007-01/2009-12心内科介入支架治疗急性心肌梗死患者108例.根据病变及经济情况将患者分为Partner组(n=58)和Cypher组(n=50).征询患者及家属意见,对部分患者进行早期康复训练,Partner组和Cypher组分别为34例和28例,所有患者于支架置入前、置入后3,5周抽取空腹静脉血,检测血清白细胞介素18,C-反应蛋白,肿瘤坏死因子α水平.置入后5周应用WHOQOL-BRIEF量表评估患者生活质量.结果与结论:未进行康复训练的Cypher组患者血清白细胞介素18,C-反应蛋白和肿瘤坏死因子α水平在置入前和置入后3,5周与未康复训练+Partner组相比,差异无显著性意义(P > 0.05).患者支架置入后5周,康复训练+Partner/Cypher组患者世界卫生组织的简明QOL测定表评分均明显高于对应的未进行康复训练组(P < 0.05).提示进行康复训练对2种支架置入的冠心病患者血清炎症因子水平无明显影响,但却对患者生活质量有明显改善作用.     

支架置入冠状动脉分叉病变后的生物相容性

背景:通过检测CYP2C19基因分型可评估冠状动脉内支架置入患者对氯吡格雷反应性的高低,但目前国内尚缺乏通过检测CYP2C19基因分型指导分叉病变部位支架置入后抗血小板治疗的临床应用。目的:根据CYP2C19基因分型结果,优化冠状动脉分叉病变支架置入后抗血小板治疗方案的效果。方法:纳入136例冠状动脉分叉病变支架置入患者,于支架置入前进行阿司匹林联合氯吡格雷抗血小板治疗,7 d后检测CYP2C19基因分型。若CYP2C19基因分型为*1/*1的作为合格组,支架置入后服用氯吡格雷75 mg/d;若CYP2C19基因分型为*2/*2、*2/*3、*3/*3的作为不合格组,再随机分为2组,一组为常规剂量组,支架置入后即保持氯吡格雷75 mg/d治疗不变,另一组为大剂量组,即增加氯吡格雷剂量为150 mg/d长期服用。随访9个月记录主要心脏不良事件和出血事件发生情况。结果与结论:发生主要心脏不良事件14例中,合格组6例(7.9%)、常规剂量组6例(17.7%)、大剂量组2例(7.7%),合格组发生率明显低于常规剂量组(P<0.05),提示CYP2C19基因分型有较好预测主要心脏不良事件的价值;大剂量组发生率明显小于常规剂量组(P<0.05),说明在CYP2C19基因分型监测下增加抗血小板药物剂量,能明显降低主要心脏不良事件的发生率;大剂量组发生率与合格组比较差异无显著性意义(P>0.05),提示通过检测CYP2C19基因分型,优化氯吡格雷剂量可达到与合格组相同的临床效果。3组出血事件发生率比较差异无显著性意义(P>0.05),提示通过检测CYP2C19基因分型抗血小板治疗不会增加出血风险。     

急性心肌梗死置入药物洗脱支架与裸金属支架的安全性及即时效应比较

背景:药物洗脱支架越来越多应用于冠状动脉狭窄患者,效果良好.但急诊应用于急性心肌梗死患者的研究报道较少.目的:对比观察Firebird支架(雷帕霉素洗脱支架)与普通金属裸支架在急性ST段抬高型心肌梗步死急诊经皮腔内冠状动脉介入治疗中应用的安全性和临床疗效.设计、时间及地点:回顾性分析,病例来自2006-01/2008-09洛阳150医院心内科.对象:选择洛阳150医院心内科收治的ST段抬高型急性心肌梗死行直接经皮腔内冠状动脉介入治疗患者94例,男71例,女23例,年龄47～76岁.方法:94例患者随机分为2组,Firebird支架组:均在靶病变置入Firebird支架1或2枚;普通支架组:在靶病变置入金属裸支架1或2枚.主要观察指标:两组患者的安全性、临床疗效及随访情况.结果:①94例患者介入治疗均获得成功.Firebird支架组52例,共置入68枚药物涂层支架;普通支架组42例,共置入56枚普通支架.两组平均置入支架个数、手术成功率、支架置入并发症发生率、置入前置入后平均狭窄程度及操作时间等差异均无显著性意义(P＞0.05);两组选用的支架内径相比,Firebird支架明显偏小(P＜0.01);两组支架长度相比,Firebird 支架显著偏长(P＜0.05).②住院期间观察两组患者心肌酶峰值,Tnl峰值,血管开通后2h ST段下降幅度,左室功能差异均无显著性意义(P＞0.05).两组靶血管重建Firebird支架组1例,普通支架组2例,差异亦无显著性意义(P＞0.05).两组各有2例患者死亡,住院期间心脏事什发生率差异无显著性意义(P＞0.05).Firebird支架组和普通支架组平均住院时间差异无显著性意义[(11.3±4.2),(12.4±4.6)d,P＞0.05].⑨出院后随访1～10个月,平均(6.5±2.4)个月,两组患者无心源性死亡、再梗死.普通支架组心绞痛发生率35.5%较Firebird支架组21.0%显著增高(P＜0.01). Firebird支架组无心脏事件生存率95%;显著高于普通支架组78%(P＜0.01).结论:雷帕霉素药物洗脱支架与普通支架一样在ST段抬高型急性心肌梗死急诊经皮腔内冠状动脉介入中是安全有效的.     

覆膜支架置入前后宿主血清炎症因子的变化

目的:支架置入宿主体内宿主所发生的变化与置入预期效果有何关系?文章观察了急性心肌梗死患者冠状动脉内支架置入前后宿主血清炎症因子的变化,并分析与支架置入后再狭窄的关系.方法:回顾性分析沈阳市第一人民医院心内科2004-01/2006-12应用支架置入治疗急性心肌梗死患者106例,其中男61例,女45例,年龄35～79岁.均符合美国心脏病学学会,美国心脏协会(ACC/AHA)关于冠心病诊断标准.75例置入Cypher支架.31例置入Firebird支架.患者对治疗知情同意.所有患者于支架置入前、支架置入后48 h和支架置入后6个月抽取空腹静脉血,检测血清白细胞介素18,白细胞介素10,C-反应蛋白,肿瘤坏死因子α含量.结果:106例患者均进入结果分析.①支架置入后6个月冠状动脉造影显示36例患者发生了再狭窄,另70例患者没发生再狭窄.②置入后再狭窄患者血清白细胞介素10、白细胞介素18、肿瘤坏死因子α和C-反应蛋白含量随着支架置入时间的延长逐渐升高(P＜0.01),且明显高于置入后无再狭窄患者(P＜0.01).结论:急性心肌梗死患者冠状动脉内支架置入后炎症因子含量升高,在支架置入后出现再狭窄的患者中更明显.     

Role of bare metal stent in drug eluting stent era

Although drug eluting stent (DES) reduced the target vessel revascularization, there are still some unsolved concerns such as late stent thrombosis, late catch up, adequate duration of dual antiplatelet agents and surgical complication after DES implantation. Individually bare metal stent should be used considering several factors such as patient characteristic, lesion characteristic, the tolerance of dual antiplatelet therapy for long-term, informed consent and also surgery after PCI.     

冠状动脉支架置入患者血清炎症因子表达及血管再狭窄

目的:评价冠状动脉支架置入后血清炎症因子对再狭窄形成的影响.方法:以冠状动脉疾病,冠状动脉支架置入,炎症介导,支架材料为检索词,检索中国期刊文数据库及Medline数据库2001/2010相关文献.纳入研究对象为冠状动脉粥样硬化性心脏病需要支架置入治疗的患者;经冠状动脉造影检查证实为冠心病的患者;不限定患者的年龄、性别、种族及地域,且同意行冠状动脉支架置入治疗;检测指标为炎症因子表达.排除感染性疾病、出血性疾病、白血病、严重肝病、严重肾功能不全及肿瘤者.重点对23条文献进行探讨.结果:支架置入后随着血清可溶性细胞间黏附分子1浓度增加sCD40L浓度也增加.支架置入后血清可溶性细胞间黏附分子1、基质金属蛋白酶9浓度均明显升高,并上调了黏附因子血清可溶性细胞间黏附分子1、基质金属蛋白酶9的表达;对血清白细胞介素18及C-反应蛋白的水平有明显影响.结论:结果说明在支架置入过程中,球囊扩张、支架置入等一系列挤压斑块因素, 促进了炎症因子释放,增加了血清炎症因子的水平.冠脉血管损伤后血管重构及再灌注也是促其增高的原因,而升高幅度与冠脉病变程度密切相关.