Nine-year clinical outcomes of drug-eluting stents vs. bare metal stents for large coronary vessel lesions

Objectives To evaluate the very long-term safety and effectiveness of drug-eluting stents （DES） compared to bare-metal stents （BMS） for patients with large coronary vessels. Methods From April 2004 to October 2006, 2407 consecutive patients undergoing de novo lesion percutaneous coronary intervention with reference vessel diameter greater than or equal to 3.5 mm at Fu Wai Hospital in Beijing, China, were prospectively enrolled into this study. We obtained 9-year clinical outcomes including death, myocardial infarction （MI）, thrombosis, target lesion revascularization （TLR）, target vessel revascularization （TVR）, and major adverse cardiac events （MACE, the composite of death, MI, and TVR）. We performed Cox＇s proportional-hazards models to assess relative risks of all the outcome measures after propensity match. Results After propensity scoring, 514 DES-treated patients were matched to 514 BMS-treated patients. The patients treated with BMS were associated with higher risk ofTLR （HR： 2.55, 95%CI： 1.520-4.277, P = 0.0004） and TVR （HR： 1.889, 95%CI： 1.185-3.011, P = 0.0075）, but the rates of death/MI and MACE were not statistically different. All Academic Research Consortium definition stent thrombosis at 9-year were comparable in the two groups. Conclusions During long-term follow-up through nine years, use of DES in patients with large coronary arteries was still associated with significant reductions in the risks of TLR and TVR.

Stent fracture after transjugular intrahepatic portosystemic shunt placement using the bare metal stent/stent-graft combination technique

BACKGROUND A transjugular intrahepatic portosystemic shunt(TIPS)is widely placed to treat portal hypertension.Because the Viatorr®stent(W.L.Gore and Associates,Flagstaff,AZ,United States)is not available in all hospitals in China,the bare metal stent(BMS)/stent-graft combination technique is still popular for TIPS construction.Stent fracture is a complication after TIPS placement using this technique,with limited available literature focusing on it.AIM To assess the incidence of stent fracture after TIPS placement using the BMS/stent-graft combination technique and to identify the risk factors for stent fracture.We proposed technique modifications to improve the clinical results of TIPS placement with the BMS/stent-graft combination technique.METHODS We retrospectively analyzed the computed tomography(CT)data of all patients with portal hypertension who underwent the TIPS procedure between June 2011 and December 2021 in a single center.Patients implanted with the BMS/stent graft and had follow-up imaging data available were included.We identified patients with stent fracture and analyzed their characteristics.Multivariable logistic regression was applied to identify the potential predictors of stent fracture.RESULTS Of the 68 included patients,stent fracture occurred in seven(10.3%)patients.Based on CT images,the stent fractures were categorized into three types.Our study consisted of four(57.1%)type I fractures,one(14.3%)type II fracture,one(14.3%)type IIIa fracture,and one(14.3%)type IIIb fracture.After adjusting for covariates,multivariable logistic regression revealed that the risk factors for stent fracture were the implantation of a greater number of stents[adjusted odds ratio(aOR)=22.2,95%confidence interval(CI):1.2-415.4,P=0.038]and a larger proximal sagittal stent bending angle(aOR=1.1,95%CI:1.0-1.3,P=0.020).CONCLUSION Stent fracture occurred in approximately 10%of patients with portal hypertension who underwent TIPS with the BMS/stent-graft combination technique.The number of implanted stents and stent bending angle at the inferior vena cava end were predictors of stent fracture,which suggests that the incidence of stent fracture could potentially be reduced by procedural modifications.

Which Offers the Best? Stent Graft or Bare Metal Stent for Endovascular Treatment of Aortoiliac Disease

Background: In the present study, it was aimed to compare the stent grafts and bare-metal stents in terms of post-procedural patency, clinical recovery and complications in the subjects with symptomatic aorto-iliac arterial disease. Methods: A total of 79 subjects with symptomatic aorto-iliac arterial disease treated with endovascular methods were included in the present study. Forty three subjects received self-expendable bare metal stent (ev3 Protégé stent system, Endovascular Inc., Plymouth, Minnesota, USA) and 36 subjects received PTFE-covered stent graft (Fluency Plus Stent Graft, Bard Peripheral Vascular, Tempe, Arizona). The subjects were compared after and at Months 1, 6, and 12 following the procedure in terms of Rutherford’s classification, ankle-arm index (AAI), patency rates, and complications. Results: The subjects receiving bare metal stent and stent graft for aorto-iliac arterial disease were followed for averagely 15 months. For the subjects receiving bare metal stent, primary patency rates at months 1, 6, and 12 were 98%, 81%, and 70%, respectively, while secondary patency rate at month 12 was found to be 84%. For the group of stent graft, primary patency rates were found as 97%, 97%, and 92%, respectively and secondary patency rate at month 12 was found to be 94%. Stent grafts were applied at the same time in 2 patients who had metal bare metal because the rupture occurred during the procedure. In the comparison between two groups, the group of stent graft was found to be statistically superior to the other in terms of patency, clinical and post-procedural complications. Conclusion: In conclusion, it was found that the stent grafts were superior to the bare metal stents in terms of patency and complication rates in the subjects with symptomatic aortoiliac disease.

Twelve Months Clinical Outcomes after Percutaneous Coronary Intervention with Bare Metal Stents in Unselected Real-Life Patients with Coronary Artery Disease: Results from FLEXUS Study

Background: Though drug-eluting stent is widely used during coronary angioplasty, still there are conditions in which bare metal stents possess a priority role. Objectives: The aim of FLEXUS study is to investigate the safety and efficacy of Flexinnium stent in unselected real-life patients. Methods: The FLEXUS is a single-centric, observational, non-randomized, retrospective study performed from January to August 2014 in 216 patients who received Flexinnium stent. The end-point of study included device-oriented and patient-oriented clinical outcomes as per Academic Research Consortium consensus. These end-points were observed at in-hospital stay and 12-month follow-up. Results: Of 216 patients, 174 (80.6%) patients were male;there were 76 (35.2%) and 84 (38.9%) patients of diabetes and hypertension, respectively. Type B2 and C lesions accounted for 27 (11.3%) and 122 (50.8%), respectively. A total of 241 Flexinnium stents were implanted with an average diameter and length of 2.7 ± 0.2 mm and 21.6 ± 8.0 mm, respectively. The cumulative device-oriented composite at 12-month follow-up included 2.31% cardiac death, 1.39% myocardial infarction (MI) attributed to the target vessel, and 3.70% target lesion revascularization (TLR). Conclusion: FLEXUS study gives an idea about favorable safety and efficacy of the Flexinnium in unselected real-life patients with both simple and complex coronary lesions.

A Novel High Nitrogen Nickel-free Coronary Stents System: Evaluation in a Porcine Model

Objective To study the safety of the novel high nitrogen nickel-free austenitic stainless steel bare metal stents （BMS） in a recognized porcine coronary model and to select a better grid structure of it. Methods Three types of stents were randomly implanted in different coronary arteries of the same pig： 316L stainless steel BMS （316L-BMS） （n=12）, novel high nitrogen nickel-free stents Grid A （NF-A-BMS） （n=12） and novel high nitrogen nickel-free stents Grid B （NF-B-BMS） （n=12）. In total, eighteen animals underwent successful random placement of 36 oversized stents in the coronary arteries. Coronary angiography was performed after 36 d of stents implantation. Nine animals were respectively sacrificed after 14 d and 36 d for histomorphologic analysis. 〈br〉 Results Quantitative coronary angiography （QCA） showed similar luminal loss （LL） in the three groups：（0.21±0.17） mm for 316L-BMS, （0.16±0.12） mm for NF-A-BMS, （0.24±0.15） mm for NF-B-BMS （P=0.05）. Histomorphomeric analysis after 15 d and 36 d revealed that there was also no significant difference among the three groups in neointimal area （NA） with similar injury scores respectively. High magnification histomorphologic examination showed similar inflammation scores in the three groups, but NF-A-BMS group had poorer endothelialization scores compared with NF-B-BMS group, 2.00±0.63 vs. 2.83±0.41 （P=0.015） at 15 d, which also could be proved by the scanning electron microscope. However, the difference could not been observed at 36 d. Conclusion The novel NF-BMS showed similar safety as 316L-BMS during the short-term study. NF-B-BMS had better endothelialization than NF-A-BMS and this may owe to the specific strut units.

Coronary stenting:A matter of revascularization

In the last few decades, the recommended treatment for coronary artery disease has been dramatically improved by percutaneous coronary intervention(PCI) and the use of balloon catheters, bare metal stents(BMSs), and drug-eluting stents(DESs). Catheter balloons were burdened by acute vessel occlusion or target-lesion restenosis. BMSs greatly reduced those problems holding up the vessel structure, but showed high rates of instent re-stenosis, which is characterized by neo-intimal hyperplasia and vessel remodeling leading to a renarrowing of the vessel diameter. This challenge was overtaken by first-generation DESs, which reduced restenosis rates to nearly 5%, but demonstrated delayed arterial healing and risk for late in-stent thrombosis, with inflammatory cells playing a pivotal role. Finally, new-generation DESs, characterized by innovations in design, metal composition, surface polymers, and antiproliferative drugs, finally reduced the risk for stent thrombosis and greatly improved revascularization outcomes. New advances include bioresorbable stents potentially changing the future of revascularization techniques as the concept bases upon the degradation of the stent scaffold to inert particles after its function expired, thus theoretically eliminating risks linked with both stent thrombosis and re-stenosis. Talking about DESs also dictates to consider dual antiplatelet therapy(DAPT), which is a fundamental moment in view of the good outcome duration, but also deals with bleeding complications. The better management of patients undergoing PCI should include the use of DESs and a DAPT finely tailored in consideration of the potentially developing bleeding risk in accordance with the indications from last updated guidelines.

Major clinical and angiographic outcome of drug eluting stents in native ostial coronary artery disease

Objectives: The study was designed to evaluate the efficacy and safety of drug eluting stents (DESs) in aorto-ostial (A-O) coronary artery lesions, in terms of early and late restenosis rate;including clinical assessment, non-invasive stress testing and angiographic follow-up. Also, the study was aimed to compare the results of implantation of drug eluting stents (DES) to that of bare metal stents (BMS) in aortoostial lesions done over a previous 5 years in Royal Brompton Hospital. Background: The safety and effectiveness of DESs for the treatment of aortoostial lesions. Methods: We included 161 consecutive patients with symptoms subjective of angina pectoris or objective evidence of myocardial ischemia;who underwent percutaneous coronary interventions (PCI) in coronary ostial lesions using DES. The patients were divided into two groups based on the site of ostial lesion. The control group consisted of 125 consecutive patients who underwent percutaneous coronary intervention for ostial lesions using bare metal stents (BMS) implantation in the period immediately before the introduction of DES. The incidence of major adverse cardiac events (MACE), including death or Q-wave myocardial infarction (MI), need for repeated revascularization procedure CABG or angioplasty, were recorded in-hospital and at twelve months ± 3 months. Follow-up angiography was only performed in case of recurrent symptoms subjective of myocardial ischemia or if there was objective evidence of myocardial ischemia by stress testing. Results: The initial procedure was successful in 149 patients (92.5%) in the DES arm. There were no statistically significant major in-hospital complications in the DES group, compared to BMS group which showed 4 cases of in-hospital deaths (p = 0.017). At Twelve months ± 3 months follow-up, MACE were significantly less frequent in the DES group compared to the BMS group, including death (0.8% vs. 6.4%, p = 0.004) and need for CABG (1.7% vs. 10%, p = 0.012). Conclusions: The main finding of our study is that, compared to the BMS, implantation of the DES in coronary ostial lesions appears safe and effective. It is associated with high procedural success rate, low immediate and in-hospital complication rate, infrequent late adverse events and favourable long-term clinical and angiographic outcomes compared with bare metal stents implantation at 12-month follow-up. Advanced age, previous myocardial infarction and acute coronary syndromes at presentation were all found to be independent positive predictors for clinical events after drug eluting stent implantation in ostial lesions.

Successful stent-in-stent dilatation of the common bile duct through a duodenal prosthesis,a novel technique for malignant obstruction:A case report and review of literature

For patients suffering from both biliary and duodenal obstruction,endoscopic retrograde cholangiopancreatography(ERCP) with stent placement is the treatment of choice.ERCP through an already existing duodenal prosthesis is an uncommon procedure and furthermore no studies have reported installing a covered metal stent onto an already existing bare metal stent in the common bile duct(CBD).We describe a rare case of a stent-in-stent dilatation of the CBD through an already existing self-expanding metal stent in the second part of duodenum for the patient presenting with jaundice in setting of biliary and duodenal obstruction from pancreatic adenocarcinoma.The biliary obstruction was relieved with a decrease in bilirubin levels post-stenting.

覆膜支架与裸支架在主髂动脉闭塞症中的疗效分析

主髂动脉闭塞症(AIOD)是以盆腔缺血和/或下肢缺血为主要表现的疾病,其发病率、就诊率呈逐年上升趋势,已成为血管外科的常见疾病。随着介入材料不断发展和手术医师介入技术的不断提高,腔内治疗凭借其创伤小、操作方便、效果明确、周期短、病死率低、术后并发症少等优点,逐步成为临床医师治疗AIOD的首选治疗方式。目前关于裸支架和覆膜支架在AIOD患者中的疗效研究较少,本综述旨在探讨覆膜支架与裸支架在AIOD中的疗效,以期为AIOD患者的腔内治疗提供参考。

药物洗脱支架植入术联合氯吡格雷治疗冠心病的临床疗效

目的探讨药物洗脱支架(DES)植入术联合氯吡格雷治疗冠心病的临床疗效。方法回顾性分析2007年1月至2011年12月,该院收治的73例接受经皮冠状动脉介入治疗(PCI)的患者,对照组(DES治疗术后,除了常规二级预防以外,服用氯吡格雷12个月)28例,观察组(DES治疗术后,除了常规二级预防外,服用氯吡格雷18个月)45例。比较两组治疗2年后急性心血管事件的再发生率、再次住院率、死亡率的差别。结果对照组与观察急性心血管事件发生率(10.7%vs 4.4%,P=0.001)、再次住院率(14.3%vs 4.4%,P=0.001)、晚期血栓发生率(14.3%vs 6.3%,P=0.001)比较差异显著,有统计学意义;死亡率(0%vs 0%,P=0.95)比较差异无统计学意义(P>0.05)。两组患者治疗后血液流变学指标显著优于治疗前,差异有统计学意义(P<0.05);观察组治疗后血液流变学指标明显优于对照组,差异有统计学意义(P<0.05)。远期观察疗效良好。结论 DES植入联合氯吡格雷对冠心病治疗效果良好,值得推广。

冠心病合并糖尿病患者置入药物洗脱支架和裸金属支架2年临床观察

目的:评价冠心病合并糖尿病患者成功置入药物洗脱支架(DES)和裸金属支架(BMS)2年后的有效性和安全性。方法:本研究入选了2004-04至2006-10在我院行择期支架置入术的冠心病合并糖尿病患者1565例。入选患者分为DES组(n=1317)和BMS组(n=248例)。随访资料包括术后30天、1年和2年的死亡、心肌梗死、血栓、靶病变血运重建和靶血管血运重建。本研究比较了DES和BMS两组间各种临床事件累积发生率的差异,同时通过倾向性评分调整后的Cox比例风险模型比较两组术后2年的临床随访结果。结果:DES和BMS两组患者术后2年出现学术研究联合会(ARC)定义的支架内血栓形成率差异无统计学意义,但DES组术后30天明确血栓形成率显著低于BMS组(0.08%比0.81%,P=0.016)。术后2年与BMS相比,DES组靶病变血运重建率[3.88%比10.89%;风险比0.159(95%可信区间:0.151～0.444),P<0.0001]和靶血管血运重建率[5.48%比11.69%;风险比0.383(95%可信区间:0.232～0.633),P<0.0001]的风险均显著降低,差异均有统计学意义。两组间全因死亡率、心肌梗死发生率及全因死亡/心肌梗死发生率差异均无统计学意义。结论:对于冠心病合并糖尿病患者而言,与置入BMS相比,使用DES可以显著降低靶病变血运重建率和靶血管血运重建率,但是全因死亡率、心肌梗死发生率和血栓形成率的差异均无统计学意义。

药物洗脱支架与金属裸支架联合氯吡格雷治疗冠心病远期疗效对比

目的探讨药物洗脱支架(DES)植入术联合氯吡格雷治疗冠心病患者的临床疗效。方法回顾性分析2007年1月至2012年12月该院收治的接受经皮冠状动脉介入治疗(PCI)的患者120例,随机分为对照组(金属裸支架治疗联合氯吡格雷)61例和观察组(药物洗脱支架联合氯吡格雷治疗)59例。比较两组治疗前后的血脂、C-反应蛋白(CRP)、心功能指标以及血液流变学指标的变化。结果与治疗前比较,两组患者血脂、C-反应蛋白(CRP)、血液流变学指标、心功能各项指标得到明显改善(P<0.05),与对照组比较,观察组血脂、CRP各项指标得到明显改善(P<0.05)。远期观察疗效良好。结论 DES植入联合双联抗血小板治疗对冠心病远期疗效良好。

紫杉醇支架和金属裸支架治疗弥漫长病变的效果比较研究

目的:比较采用紫杉醇药物洗脱支架(PES)和金属裸支架(BMS)治疗弥漫长病变的近期和远期预后。方法:患者为我院接受置入单个长度>25 mm紫杉醇药物洗脱支架(PES组,n=68)或金属裸支架(BMS组,n= 132)治疗并且进行冠状动脉造影随访的200例患者。患者在支架术后6个月后接受冠状动脉造影随访。结果:在患者临床基本条件方面PES组较BMS组2型糖尿病患者更多,有显著性差异;在病变基本条件方面,PEs组术前参考血管直径明显小于BMS组,支架长度大于BMS组。6个月后的随访结果显示支架内再狭窄率PES组小于BMS组(P=0．002)。晚期腔径丢失BMS组明显大于PES组(P<0．001)。靶病变血管重建率(TLR)PES组有好于BMS组[10(13．5％)vs．35(24．3％),P=0．062]的趋势,但是没有达到统计学差异。结论:本研究发现对于弥漫长病变的治疗,PES较BMS明显减少晚期腔径丢失和支架再狭窄率,靶病变血管重建率两组并没有差异,临床效果尚需进一步观察。

药物洗脱支架与金属裸支架对冠状动脉临界病变的远期疗效

目的:评估药物洗脱支架与金属裸支架对于治疗冠状动脉临界病变的远期疗效。方法:自身冠状动脉首次介入治疗病变(在线定量冠状动脉造影分析50%≤管腔狭窄直径≤70%)的患者入选本研究,共计151例患者分为药物洗脱支架组(n=102)和金属裸支架组(n=49),两组的基本临床特征和冠状动脉造影结果差异无统计学意义。术前、术后和随访6～12个月时进行定量冠状动脉造影分析,并在住院期间、30天和6～12个月时观察严重不良心脏事件的发生。结果:151例患者支架置入成功率均为100%。住院期间严重不良心脏事件发生率,在药物洗脱支架组和金属裸支架组差异无统计学意义(0%和2.0%,P=0.15)。在随访30天时,两组均无死亡和支架内血栓形成。6～12个月随访期间,药物洗脱支架组和金属裸支架组比较①严重不良心脏事件发生率(3.9%vs8.1%,P=0.97),②靶病变重复血管重建率(2.9%vs6.1%,P=0.39),③急性心肌梗死发生率(1.96%vs2.04%,P=0.95),差异均无统计学意义。12个月时药物洗脱支架组和金属裸支架组比较,支架内血栓发生率和病死率差异也无统计学意义(1.96%vs0%,P=0.34;0%vs4.08%,P>0.05)。定量冠状动脉造影分析显示:远期管腔丢失药物洗脱支架组明显低于金属裸支架组[(0.23±0.73)mmvs(0.95±0.94)mm,P=0.01],两组比较差异有统计学意义;而支架内再狭窄率两组比较差异无统计学意义(12.9%vs25.0%,P=0.34)。结论:药物洗脱支架和金属裸支架对于治疗自身冠状动脉临界病变安全有效,两组远期严重不良心脏事件发生率差异无统计学意义。

紫杉醇药物涂层支架治疗左前降支病变临床研究

目的：探讨紫杉醇药物涂层支架（PES）治疗冠状动脉左前降支（LAD）病变的即刻疗效及预后。方法：2003年2月～2005年3月在本院造影证实连续LAD单支病变患者94例，共107处病变，按常规行经皮冠状动脉成形术加支架置入术，分析患者临床、X线影像学特征及手术成功率，并行随访。结果：94例患者中，29例置入PES，65例置入金属裸支架（BMS），手术成功率100％。病变弥漫性30例（31．9％），位于近段52例（55．3％），中段12例（12．8％）。全部患者均完成术后6个月的随访并行造影复查。PES组术后6个月时造影复查2例（6，9％）发生再狭窄；BMS组1例1个月内因急性前壁心梗死亡，6个月时造影复查21例（32．3％）发生再狭窄。结论：PES置入治疗冠状动脉LAD病变安全有效，术后心源性猝死及非Q波性心肌梗死发生率与置入BMS者相似，支架内再狭窄发生率明显降低，因再狭窄需冠脉搭桥率也显著降低，术后6个月再狭窄率与文献报道冠脉搭桥术相近。

药物涂层球囊与金属裸支架治疗下肢动脉硬化闭塞症效果和安全性对比

目的探讨国产紫杉醇药物涂层球囊(DCB)与金属裸支架(BMS)治疗下肢动脉硬化闭塞症(ASO)的效果和安全性差异,为下肢ASO治疗决策提供临床依据。方法采用回顾性临床对照研究方法收集79例泛大西洋学会联盟(TASC)ⅡA^C型股-腘动脉ASO患者,根据治疗方法不同分为DCB组(n=41)和BMS组(n=38),分析对比两组患者术前、术中资料,术后随访1、3、6、12个月。结果两组患者一般临床资料和靶病变程度差异均无统计学意义(P>0.05)。DCB组与BMS组术后1个月患肢踝-肱指数(ABI)差异无统计学意义(0.79±0.21对0.84±0.20,P=0.369),术后12个月一期通畅率差异无统计学意义[92.7%(38/41)对94.7%(36/38),P=0.863]。随访期间BMS组出现1例严重不良事件(血管内支架断裂),两组均无截肢和治疗相关死亡。结论国产紫杉醇DCB治疗股-腘动脉ASO效果良好,与BMS临床疗效和安全性相比无明显差异。临床决策中DCB是一重要选择。

国产雷帕霉素洗脱支架和裸支架植入后血管再内皮化实验研究

目的评价国产雷帕霉素洗脱支架与裸支架植入兔腹主动脉后不同时间血管再内皮化差异。方法雄性新西兰大白兔24只,高脂喂养28d后随机分为两组,分别于腹主动脉植入国产雷帕霉素洗脱支架Firebird(SES)和裸金属支架Mustang(BMS)。每组分别于术后第3、7、14和28天各处死3只动物,经处理后以扫描电镜观察支架段血管内皮,应用图像处理系统分析支架植入段血管再内皮化程度。结果支架植入术后第3天两组几乎均无新生内皮,炎症反应较明显。术后第7、14和28天,SES组内皮覆盖程度明显低于BMS组(分别为15%±8%比53%±9%;49%±16%比83%±4%和73%±3%比93%±4%,P<0.05)。结论SES植入后靶血管出现明显的再内皮化延迟。

经颈静脉肝内门腔分流术中覆膜支架两端长度与长期疗效的关系

目的探讨使用全覆膜支架行经颈静脉肝内门腔分流术(TIPS术)中支架分流道的两端长度与长期分流道通畅率、肝性脑病(HE)、生存率之间的关系。方法回顾性分析2008年1月~2011年12月在我科行TIPS术患者53例,均采用直径8mm全覆膜支架(Fluency支架,Bard)建立分流道,再视造影情况加以同等直径裸支架延长肝静脉端、门脉端。测量覆膜支架进入肝静脉长度、门静脉长度(X1、X2),肝静脉、门静脉支架总长度(X3、X4),行COX回归分析其对TIPS术后道通畅率、生存率及肝性脑病发生率的影响。结果全部患者均成功建立分流道,术前门脉压力(29.80±4.83)mm Hg,术后门脉压力(19.00±3.92)mm Hg,下降(10.80±5.15)mm Hg(t=13.44,P<0.01)。随访时间3~89月,中位随访期64月,平均39个月。期间肝性脑病发生率为23%(12/53)。16例出现分流道再狭窄,5年累积一期通畅率分别为83%、75%、63%、62%、54%。5年累积生存率分别为79%、72%、72%、69%、69%。通畅率COX回归分析显示X1有统计学意义(OR=0.42,P<0.01);生存率COX回归分析显示X4有统计学意义(OR=1.50,P=0.021);肝性脑病影响因素分析均无统计学意义。结论使用Fluency覆膜支架行TIPS术,适当增加肝静脉端覆膜支架长度、减少支架进入门静脉长度可提高分流道通畅率及生存率。

药物洗脱支架与金属裸支架置入术后对糖尿病患者远期死亡、心肌梗死和支架血栓发生情况的影响

目的本研究通过比较糖尿病患者置入金属裸支架(bare metal stents,BMS)vs药物洗脱支架(drug eluting stents,DES)后发生死亡、心肌梗死(myocardial infarction,MI)、再次血运重建和支架血栓的情况,以评价糖尿病患者置入DES后的远期安全性和有效性。方法本研究于2003年7月～2005年12月连续入选了834例因冠心病合并糖尿病在首都医科大学附属北京安贞医院心内科行经皮冠状动脉介入治疗(percutaneous coronary intervention,PCI)的患者,按置入支架类型将患者分为DES组(n=583)和BMS组(n=251)。主要终点事件为24个月时全因病死率;次要终点事件为24个月时非致死性MI、再次血运重建以及主要不良心血管事件(major adverse cardiac events,MACE)的发生率。结果本研究结果经多因素回归分析显示,DES组明显降低了24个月时死亡[3.2%vs 5.1%,危险比(hazard ratio,HR)0.34,95%可信区间(confidential interval,CI)0.12～0.94,P=0.038]和心性死亡的风险(2.2%vs 4.4%,HR=0.29,95%CI:0.13～0.87,P=0.027),非致死性MI和心性死亡与非致死性MI复合终点发生风险比较差异无统计学意义;明确和可能的支架血栓的发生风险比较差异也没有统计学意义(1.9%vs 2.0%,HR=0.96,95%CI:0.51～2.17,P=0.351)。DES明显降低了再次血运重建的风险(10.5%vs 20.7%,HR=0.24,95%CI:0.11～0.78,P<0.001)和靶血管再次血运重建的风险(8.9%vs 17.1%,HR=0.33,95%CI:0.16～0.87,P<0.001);与BMS组比较DES组的MACE的风险也明显降低,差异有统计学意义(15.8%vs 27.9%,HR=0.19,95%CI:0.09～0.85,P<0.001);其主要与DES组患者的死亡和靶血管再次血运重建的风险降低有关。结论与BMS相比,DES可显著降低糖尿病患者的24个月时死亡、再次血运重建和MACE的风险,而未增加非致死性MI和支架血栓的风险。置入DES后死亡风险的降低原因,主要与DES降低再狭窄后的死亡和MI风险,获得更高的完全血运重建率以及未增加支架血栓的风险相关。

药物洗脱性支架和裸金属支架植入治疗冠状动脉狭窄的临床随访观察

目的探讨药物洗脱性支架(DES)和裸金属支架(BMS)治疗冠状动脉狭窄的远期疗效。方法对成功进行DES植入术患者2734例和BMS植入患者216例术后6个月、1年进行随访,观察其支架内再狭窄(ISR)发生率、急性心肌梗死发生率、冠状动脉旁路移植(CABG)或再次经皮冠状动脉介入治疗(PCI)治疗率、病死率,分析术后再狭窄的独立危险因素。结果术后6个月、1年时DES组ISR发生率均低于BMS组(9.58%vs 18.98%,18.32%vs 31.94%),差异有统计学意义(P<0.05);随访6个月时,急性心肌梗死发生率、CABG或再次PCI治疗率和病死率方面比较差异无统计学意义(P>0.05),但是随访1年后,其差异有统计学意义(P<0.05);多因素分析发现,支架直径≤3 mm、吸烟和年龄是支架植入术后发生再狭窄的独立危险因素。结论在冠状动脉狭窄的治疗中,DES的远期疗效优于BMS,但临床应用还需要进一步的循证医学研究证据。