新型口服抗凝药物治疗高龄非瓣膜性房颤患者的疗效分析

目的 比较新型口服抗凝药物(NOAC)利伐沙班、达比加群酯和传统抗凝药物华法林用于高龄非瓣膜性房颤患者抗凝治疗的有效性和安全性.方法 将264例高龄非瓣膜性房颤患者分为3组,利伐沙班组88例,述比加群酯组88例;华法林组88例,根据国际标准化比值(INR)调整剂量,将INR控制在2.00～2.50.结果 卒中或血栓栓塞事件在利伐沙班组发生2例(2.27％);达比加群酯组发生3例(3.41％);华法林组发生4例(4.55％).出血事件在利伐沙班组发生7例(7.95％);达比加群酯组发生6例(6.82％);华法林组发生13例(14.77％).3组间卒中或血栓栓塞的发生率比较差异无统计学意义(P＞0.05);利伐沙班组和达比加群酯组出血事件的发生率低于华法林组(P＜0.05),但利伐沙班组与达比加群酯组比较差异无统计学意义(P＞0.05).结论 NOAC利伐沙班、达比加群酯与华法林比较,在降低高龄非瓣膜性房颤患者卒中和血栓栓塞事件方面,治疗效果与华法林相当,而出血事件的发生率低于华法林.     

低强度华法林抗凝治疗脑卒中风险房颤患者的临床研究

目的应用CHADS2卒中危险评分和HEMORR2HAGES出血风险评分,观察低强度华法林抗凝治疗高卒中风险、高出血风险房颤患者的抗栓疗效和安全性。方法选择CHADS2卒中危险评分3～6分、HEMORR2HAGES评分≥2分的房颤患者60例,随机分成两组：每组各30例,组Ⅰ为低强度华法林治疗组[1.5≤国际标准化比值（INR）≤2.0];组Ⅱ为阿司匹林对照组,观察各组卒中和出血事件的发生率。结果治疗组的血栓发生率明显低于对照组,出血发生率和对照组差异无统计学意义。结论对于脑卒中风险的房颤患者,低强度华法林抗凝能有效减少血栓事件发生,使用安全可靠。     

房颤患者支架介入术后不同抗凝方案效果及出血风险比较

目的比较房颤(AF)患者药物洗脱支架介入后不同抗凝方案治疗的出血风险以及心脑血管事件发生风险。方法选取本院2012年1月至2015年1月期间收治的行药物洗脱支架介入术AF患者161例为研究对象,根据患者医生的推荐和患者家家属的意愿分为三联抗栓组(TT组)、双联抗栓组(DT组)、华法林联合氯吡格雷组(W+C组)和利伐沙班组(R组)。TT组采用华法林、阿司匹林联合氯吡格雷三联抗栓治疗,DT组采用阿司匹林、氯吡格雷双联抗栓治疗,W+C组采用华法林、氯吡格雷治疗,R组采用利伐沙班治疗。门诊或电话随访2年,统计患者出血事件、主要心脑血管事件发生率以及INR达标率。结果 TT组出血事件总发生率为16.00%,显著高于DT组、W+C组和R组(P0.05),DT组、W+C组和R组出血事件总发生率之间差异无统计学意义(P0.05);TT组主要心脑血管事件总发生率为6.00%,R组主要心脑血管事件总发生率为5.71%,显著低于DT组(P0.05),TT组、R组和W+C组主要心脑血管事件总发生率之间差异无统计学意义(P0.05),DT组和W+C组主要心脑血管事件总发生率之间差异无统计学意义(P0.05);TT组每月INR达标率低于W+C组,但差异无统计学意义(P0.05)。结论 AF患者药物洗脱支架介入后采用三联抗栓治疗可显著减少脑卒中、心肌梗死等主要心脑血管事件发生率,但出血风险相对较大;双联抗栓治疗和华法林、氯吡格雷联合治疗虽降低出血风险,但心脑血管事件发生率较高,利伐沙班治疗不仅可减少出血事件,还可减少心脑血管事件。     

不同强度华法林与利伐沙班对高龄心房颤动患者的抗凝疗效与安全性比较

目的利用食管超声对高龄心房颤动伴血栓形成患者经不同强度华法林与利伐沙班抗凝治疗后作血栓检出率及安全性比较。方法选取确诊有左心房血栓形成的非瓣膜性高龄房颤（75～80岁）患者54例,随机分为低强度华法林抗凝组（低强度组）,标准强度华法林抗凝组（标准强度组）,利伐沙班抗凝组（利伐沙班组）,每组18例。观察期为12个月。比较3组患者左心房血栓检出率、血栓栓塞事件率及严重出血发生率。结果12个月时低强度组左心房血栓检出率22.2%,标准强度组检出率22.2%,利伐沙班组检出率16.7%,3组比较差异无统计学意义（P＞0.05）。低强度组血栓栓塞事件发生率为16.7％,标准强度组发生率为11.1%,利伐沙班组发生率为11.1％,3组比较差异无统计学意义（P＞0.05）。低强度华法林组严重出血事件发生率为16.7%,标准强度华法林组为27.8%,利伐沙班组为11.1%,低强度组与利伐沙班组比较,严重出血事件发生率无统计学意义（P＞0.05）,标准强度组的出血发生率高于低强度组以及利伐沙班组患者,差异均有统计学意义（均P＜0.05）。结论应用低强度华法林与利伐沙班抗凝在高龄房颤伴血栓形成的患者治疗中,两者治疗左心房血栓的疗效确切,出血风险无增加,安全性好。     

高龄老年房颤患者抗栓治疗的疗效及安全性研究?

目的：比较高龄老年心房颤动(房颤)患者不同抗栓方案的疗效及安全性。方法选择该院完成2年随访的住院和门诊房颤患者共157例,根据服用抗栓药物将患者分为3组,即华法林组、阿司匹林组、阿司匹林联合氯吡格雷(双抗)组,观察3组患者心血管血栓事件及出血事件。结果双抗组冠心病和糖尿病患病率高于其他两组(P <0.05),双抗组和华法组脑梗死发生率明显低于阿司匹林组(P <0.05),而双抗组患者在抗栓效果中和华法林组患者无明显区别。在不良事件方面,华法林及双抗组患者的皮肤淤斑明显高于阿司匹林组(P <0.05),双抗组患者皮肤瘀斑的发生率高于华法林组(P <0.05)。结论房颤患者口服华法林或双联抗血小板对抗栓疗效优于阿司匹林,但出血风险明显增加。     

不同抗凝强度的华法林对非瓣膜病性房颤抗栓的疗效和安全性

目的 探讨不同抗凝强度的华法林对非瓣膜病性房颤患者抗栓治疗的疗效和安全性.方法 选择150例非瓣膜病性房颤患者,随机分为3组:组Ⅰ为标准强度华法林治疗组[2.0＜国际标准化比值(INR)≤2.5)]50例,组Ⅱ为低强度华法林治疗组(1.6＜INR≤2.0)50例,组Ⅲ为阿斯匹林对照组50例.应用华法林抗凝并行INR监测,分析血栓栓塞和出血事件发生与INR的关系以及D-二聚体浓度的变化.结果 治疗后组Ⅰ血栓栓塞发生率低于组Ⅱ和组Ⅲ.3组患者出血发生率比较无统计学意义.3组治疗后D-二聚体浓度均显著低于治疗前(P＜0.001),其中组ⅠD-二聚体浓度治疗前后变化最显著,且治疗后组Ⅰ的D-二聚体水平显著低于其它两组(P＜0.001),组Ⅱ的D-二聚体水平低于组Ⅲ(P＜0.001).结论 组Ⅰ对非瓣膜病性房颤患者抗栓治疗的疗效优于组Ⅱ和组Ⅲ,且INR维持在标准强度(2.0～2.5)范围内,出血的发生率低,使用安全可靠.     

单中心非瓣膜性心房颤动患者抗栓现状分析及建议

背景　非瓣膜性心房颤动（NVAF）是临床常见的心律失常疾病,脑卒中是心房颤动（简称房颤）最常见的危害之一。目前临床研究主要集中在房颤合并冠心病抗栓方案或抗栓达标情况探讨方面,对于不同用药方案之间远期安全性及有效性的研究少有报道。目的　对房颤各抗栓方案有效性及安全性、各年龄组用药方案及1年内房颤相关终点事件进行对比分析。方法　选取2018年1-10月于广东省中医院心血管科住院的NVAF患者354例为研究对象,记录患者的性别、年龄、房颤类型（阵发性、永久性、持续性、长程持续性）、合并症﹝脑卒中/短暂性脑缺血发作（TIA）、心力衰竭、高血压、糖尿病、冠心病、高脂血症﹞、肌钙蛋白T（cTnT）、卒中风险评分（CHA2DS2-VASc评分）、出血风险评分（HAS-BLED评分）及随访1年内血栓栓塞事件、出血事件、全因死亡及再入院情况。按抗栓方案不同分为无抗栓组（42例）、阿司匹林组（21例）、氯吡格雷组（51例）、联合组（25例）、华法林组（49例）、达比加群组（89例）、利伐沙班组（77例）,按年龄不同分为<65岁（60例）、65~75岁（92例）、>75岁（202例）,并比较不同抗栓方案及年龄间各项指标有无差异。结果　联合组男性占比高于无抗栓组,华法林组年龄小于氯吡格雷组,利伐沙班组阵发性房颤占比低于联合组,无抗栓组、华法林组冠心病占比低于氯吡格雷组、联合组,联合组冠心病占比高于利伐沙班组、达比加群组,联合组cTnT水平高于无抗栓组、阿司匹林组、氯吡格雷组、华法林组、利伐沙班组、达比加群组,氯吡格雷组HAS-BLED评分高于达比加群组（P<0.05）。不同抗栓方案治疗 1年内总血栓栓塞事件发生率比较,差异有统计学意义（χ2=12.404,P=0.054）,全因死亡率比较,差异无统计学意义（χ2=9.925,P=0.128）。不同抗栓方案治疗1年内总出血事件发生率比较,差异有统计学意义（χ2=14.420,P=0.019）。不同年龄段患者再入院率比较,差异有统计学意义（P<0.05）。结论　早期识别房颤并行抗栓治疗在预防血栓栓塞方面具有重要意义。抗栓首选新型口服抗凝药物（NOAC）或者华法林,NOAC在预防血栓形成及出血方面不劣于华法林,但需注意消化道出血风险。对于高龄房颤患者,抗凝更需个体化。     

华法林对老年2型糖尿病合并心房颤动患者的效果观察

目的:观察华法林对老年2型糖尿病合并心房颤动(房颤)患者抗凝治疗的效果。方法:选择132例75岁以上2型糖尿病合并房颤患者,随机分为华法林中等强度组[国际标准化比值(INR)维持在2.1～2.5],华法林低等强度组(INR维持在1.5～2.0),对照组(口服阿司匹林),每组44例。随访1年,记录血栓栓塞和出血事件发生率。结果:华法林中等强度组、低等强度组和对照组血栓栓塞事件呈逐渐增多,对照组血栓栓塞发生率高于华法林中等和低等强度组(P<0.05),中等和低等强度组血栓栓塞发生率差异无统计学意义(P>0.05)。中等强度组、低等强度组和对照组出血事件呈逐渐减少,中等强度组出血发生率均高于低等强度组和对照组(P<0.05),但对照组出血发生率与低等强度组差异无统计学意义(P>0.05)。结论:华法林治疗老年2型糖尿病合并房颤患者,INR维持在1.5～2.0,不仅能够取得最佳的抗凝效果,同时能够有效地避免出血事件的发生。     

926例房颤患者抗栓治疗效果观察

目的探讨对房颤患者抗栓治疗的效果。方法选择2008年1月至2011年12月该院住院或门诊就诊的非瓣膜性房颤患者926例,按患者目前正在接受的抗栓治疗策略的不同进行分组,采用华法林抗栓治疗的329例为华法林组,每日口服华法林2.5mg并适时调整剂量使国际标准化比值(international normalized ratio,INR)达到2～3;采用阿司匹林抗栓治疗的299例为阿司匹林组,每日口服阿司匹林100mg;另298例仅接受常规治疗,未接受任何抗栓药物治疗的患者为对照组。比较各组患者缺血性脑卒中发生率和与抗栓治疗相关的出血事件发生率。结果华法林和阿司匹林治疗后患者缺血性脑卒中发生率低于对照组(P<0.05);华法林组比阿司匹林组缺血性脑卒中的发生率降低更为显著(P<0.05);3组患者出血事件发生率比较差异无统计学意义(P>0.05)。结论阿司匹林或华法林治疗均能显著降低房颤患者缺血性脑卒中发生率,华法林的效果更为显著。     

不同剂量华法林对高龄稳定性冠心病合并非瓣膜性AF患者的疗效和安全性研究

目的 探讨不同剂量华法林抗凝治疗对高龄稳定性冠状动脉粥样硬化性心脏病(简称冠心病)合并非瓣膜性心房颤动(AF)患者的临床效果和安全性.方法 选取2013年6月至2015年6月该院心内科收治的141例高龄稳定性冠心病合并非瓣膜性AF患者的临床资料,分为低剂量华法林组和标准剂量华法林组.低剂量组开始口服华法林1.25 mg,国际标准化比值(INR)达标范围为1.5～2.1;标准剂量组开始口服华法林2.5 mg,INR达标范围为2.2～2.7,随访患者临床复合终点(全因死亡和血栓时间)和安全终点事件(出血事件),并分析血栓事件和出血安全事件与INR的关系.结果 共有135例患者临床资料纳入数据分析,两组患者分别在性别、年龄、BMI、左室射血分数(LEVF)、合并症数量、肌酐清除率、CHA2DS2VASc评分、HAS-BLED评分等方面比较,差异无统计学意义(P＞0.05),具有可比性;两组全因死亡、缺血性脑卒中、无症状脑卒中、肺栓塞比较,差异无统计学意义(P＞0.05),低剂量组腔隙性脑梗死及外周血管栓塞发生率显著高于标准剂量组,差异有统计学意义(P＜0.05);两组患者脑出血、胃出血发生率比较,差异无统计学意义(P＞0.05),而标准剂量组在肾脏出血、皮肤黏膜出血、牙龈出血等方面发生率显著高于低剂量组,差异有统计学意义(P＜0.05);两组华法林服用剂量和INR水平比较,差异有统计学意义(P＜0.05),低剂量组患者INR水平明显低于标准组,INR值越小,患者出血事件发生率越低,而栓塞事件发生率越高,INR值越大,患者出血事件发生率越高,而栓塞事件发生率越低.结论 不同强度华法林抗凝治疗均对高龄稳定性冠心病合并非瓣膜性AF患者的治疗有效且安全,低剂量华法林安全性优于标准剂量.     

Earlier application of loading doses of aspirin and clopidogrel decreases rate of recurrent cardiovascular ischemic events for patients undergoing percutaneous coronary intervention

Background  Aspirin and clopidogrel resistance plays a significant role in the development of cardiovascular ischemic events for ninety patients undergoing percutaneous coronary intervention. Recent studies have indicated that increasing the dose of antiplatelet drugs maybe a potent method to improve the inhibition of platelet aggregation.

Methods  Thrombelastograph (TEG) determinations were used to evaluate the effect of antiplatelet therapy. According to the results, 90 patients were divided into three groups and given different doses of aspirin and clopidogrel. Thirty patients with both an inhibition rate of aspirin >50% and an inhibition rate of clopidogrel >50% were defined as the control group. Sixty patients with an inhibition rate for aspirin <50% and an inhibition rate for clopidogrel <50% were defined as the resistance group. Patients in resistance group were randomly assigned to be given a routine dose (100 mg aspirin plus 75 mg clopidogrel per day, which we called a resistance plus routine dose group, R+R) and a loading dose (200 mg aspirin and 150 mg clopidogrel per day, which we called resistance plus loading dose group, R+L) of antiplatelet therapy. A 12-month follow-up was observed to examine the change of inhibition rate of antiplatelet therapy and to estimate the relationship between inhibition rate and the occurrence of cardiovascular ischemic events.

Results  After 6 months of antiplatelet therapy, the inhibition rate of aspirin in the R+L group increased from (31.4±3.7)% to (68.6±7.1)%, which was significantly higher than that in R+R group, (51.9±8.2)% (P <0.01). The inhibition rate of clopidogrel in the R+L group increased from (22.1±3.8)% to (60.2±7.4)%, which was significantly higher than in the R+R group, (45.9±4.3)% (P <0.01). The occurrence rates of cardiovascular ischemic events, stent thrombosis, recurrent unstable angina and myocardial infarction in the R+R group were 20%, 36% and 17%, respectively. Occurrence was significantly increased compared with that in the control group, 3%, 10% and 1%, respectively (P <0.01). In contrast, the occurrence rates in the R+L group (10%, 23% and 6%, respectively) were attenuated compared with those in the R+R group (P <0.01), although still higher than in the control group (P <0.01).

Conclusions  Almost all of the cardiovascular ischemic events occurred in the first six months after percutaneous coronary intervention. According to the result of TEG determinations, earlier application of a loading dose of aspirin and clopidogrel can decrease the rate of recurrent cardiovascular ischemic events.

     

房颤合并冠心病患者经皮冠状动脉介入治疗术后不同抗栓方案的比较

目的 关于房颤(atrial fibrillation,AF)合并冠心病经皮冠状动脉介入治疗(percutaneous coronary intervention,PCI)术后患者不同抗栓方案的比较。 方法 收集2015年1月-2016年6月间在滁州市第一人民医院住院治疗的90例房颤合并冠心病PCI术后患者,依据患者出院后使用的不同抗栓方案分为3组,即三联抗栓组(TT组,30例)、华法林联合氯吡格雷组(WS组,30例)、双抗组(DT组,30例)。3组其他辅助用药基本相同。记录随访12个月的临床终点事件并进行统计分析。 结果 患者总体卒中风险较高(CHA2DS2-VASc评分 ≥ 2分占58%),出血风险稍低(HAS-BLED ≥ 3分占49%),3组总体差异均无统计学意义(P>0.05)。三联抗栓治疗组的MACCE发生率最低(6.7%),且3组差异有统计学意义(χ2=6.193,P=0.045)。采用Bonferroni法进行两两比较,结果显示,TT组和DT组有差异(χ2=5.454,P=0.021),其余两组之间无统计学差异(P>0.05)。3组间TIMI主要出血发生率无差异(χ2=0.000,P=1.000),三联抗栓治疗组TIMI次要出血发生率较高(13.3%),但3组差异无统计学意义(χ2=1.098,P=0.577)。 结论 对于房颤合并冠心病PCI术后患者,从缺血性卒中率和MACCE率来看,TT组要优于DT组,WS组与DT组和TT组之间无差异。      

房颤抗栓治疗临床分析

目的:分析房颤患者抗栓治疗和抗凝治疗的疗效和安全性。方法:回顾性分析我院住院的患者140例,分为阿司匹林组85例和华法林组55例;观察两组的疗效和安全性。结果:阿司匹林组缺血性事件发生率明显高于华法林组(P<0.05);但华法林组出血性事件发生率明显高于阿司匹林两组(P<0.05)。结论:对于房颤患者,不仅应积极进行栓塞的危险分层管理,还需进行出血的危险分层,权衡出血和栓塞的风险,把好抗栓治疗与预防出血的平衡,使患者最大程度受益于抗栓治疗。     

Anticoagulation therapy in Chinese patients with non-valvular atrial fibrillation: a prospective, multi-center, randomized,

Background  Non-valvular atrial fibrillation is associated with an increased risk of ischemic stroke; however, the appropriate intensity of anticoagulation therapy for Chinese patients has not been determined. The purpose of this study was to compare the safety and the efficacy of standard-intensity warfarin therapy, low-intensity warfarin therapy, and aspirin therapy for the prevention of ischemic events in Chinese patients with non-valvular atrial fibrillation (NVAF).

Methods  A total of 786 patients from 75 Chinese hospitals were enrolled in this study and randomized into three therapy groups: standard-intensity warfarin (international normalized ratio (INR) 2.1 to 2.5) group, low-intensity warfarin (INR 1.6 to 2.0) group and aspirin (200 mg per day) group. All patients were evaluated by physicians at 1, 3, 6, 9, 12, 15, 18, 21 and 24 months after randomization to obtain a patient questionnaire, physical examination and related laboratory tests.

Results  The annual event rates of ischemic stroke, transient ischemic attack (TIA) or systemic thromboembolism were 2.6%, 3.1% and 6.9% in the standard-intensity warfarin, low-intensity warfarin and aspirin groups, respectively (P=0.027). Thromboembolic event rates in both warfarin groups were significantly lower than that in the aspirin group (P=0.018, P=0.044), and there was no significant difference between the two warfarin groups. Severe hemorrhagic events occurred in 15 patients, 7 (2.6%) in the standard-intensity warfarin group, 7 (2.4%) in the low-intensity warfarin group and 1 (0.4%) in the aspirin group. The severe hemorrhagic event rates in the warfarin groups were higher than that in the aspirin group, but the difference did not reach statistical significance (P=0.101). The mild hemorrhagic and total hemorrhagic event rates in the warfarin groups (whether in the standard-intensity warfarin group or low-intensity warfarin group) were much higher than that in the aspirin group with the annual event rates of total hemorrhages of 10.2%, 7.6% and 2.2%, respectively, in the 3 groups (P=0.001). Furthermore, there was no significant difference in all cause mortality among the three study groups.

Conclusion  In Chinese patients with NVAF, the warfarin therapy (INR 1.6–2.5) for the prevention of thromboembolic events was superior to aspirin.

     

华法林对78例非瓣膜性心房颤动患者抗凝疗效及安全性观察

目的比较华法林在非瓣膜性心房颤动患者中的抗凝疗效及安全性。方法2007年11月～2010年9月在我院门诊及住院的非瓣膜性心房颤动患者156例,随机分为华法林组及阿司匹林组各78例。比较两组患者血栓栓塞等终点事件和不良反应发生率。结果华法林组血栓栓塞等终点事件发生率显著低于阿司匹林组（P〈0．05）,两组不良反应发生率差异无统计学意义（P〉0．05）。结论华法林对非瓣膜性心房颤动患者的抗凝疗效优于阿司匹林组。     

Efficacy and safety of triple-antiplatelet therapy after percutaneous coronary intervention: a meta-analysis

Background The combination of cilostazol,aspirin and clopidogrel (triple antiplatelet therapy,TAT) after a percutaneous coronary intervention has been used as an alternative therapy.We performed a meta...     

外周动脉支架成形术后抗血小板药物预防再狭窄的临床观察

目的 研究抗血小板药物在外周动脉支架成形术后预防再狭窄的疗效.方法 将2003年1月至2006年7月在复旦大学附属华山医院血管外科行外周动脉支架植入术后且符合入组条件的动脉硬化闭塞症病人103例分为治疗组(56例)及对照组(47例).治疗组每日口服氯吡格雷(75 mg/d)+拜阿司匹林(100 mg/d);对照组术后每日皮下注射低分子肝素1周,并从术后第3天起口服华法令.主要终点事件为支架内闭塞、再狭窄以及临床出血率,次要终点事件为心血管事件、死亡以及药物不良反应等.结果 两组病人基线特征比较差异无统计学意义(P＞0.05).治疗组和对照组急性支架内血栓形成的发生率分别为1例(1.8%)和0例(0%),18个月的再闭塞率分别是3例(5.4%)和5例(10.6%),支架内再狭窄率分别是8例(14.3%)和12例(25.5%,P＞0.05).治疗组在出血并发症方面显著低于对照组(1.8%vs 19.1%,P＜0.01).两组的心血管事件发生率和病死率无统计学意义.结论 氯吡格雷联合阿司匹林可以预防外周动脉支架成形术后的再狭窄.     

华法林和阿司匹林对非瓣膜性心房颤动患者的抗凝疗效比较

目的 比较华法林和阿司匹林对非瓣膜性心房颤动患者的抗凝疗效.方法 比较阿司匹林组和华法林组患者的血栓栓塞和不良反应发生率.结果 华法林组血栓栓塞发生率显著低于阿司匹林组（P＜0.05）;两组不良反应发生率差异无统计学意义（P＞0.05）.结论 华法林对非瓣膜性心房颤动患者的抗凝疗效优于阿司匹林.     

Predictive value of antiplatelet resistance on early stent thrombosis in patients with acute coronary syndrome

Background  Despite outstanding antiplatelet properties of aspirin and clopidogrel, some patients taking these drugs continue to suffer complications. Antiplatelet resistance appears to be a new prognostic factor in acute coronary syndrome patients for clinical events associated with stent thrombosis (ST). However, there is no optimal method to identify it and assess its correlation to clinical outcomes. This study sought to evaluate the predictive value of antiplatelet resistance assessed by whole blood impedance aggregometry for the risk of early ST in patients with acute coronary syndrome who underwent coronary stenting.

Methods  Platelet responses to aspirin and clopidogrel in 86 patients with acute coronary syndrome were measured by whole blood impedance aggregometry. Spontaneous platelet aggregation was defined as antiplatelet resistance identified by the increased electrical impedance. The clinical endpoint was early stent thrombosis during 30-day follow-up after coronary stenting.

Results  The prevalence of aspirin resistance, clopidogrel resistance and dual resistance of combined clopidogrel and aspirin resistance were 19.8%, 12.8% and 5.8% respectively. Diabetes, female and higher platelet counts were more frequently detected in clopidogrel-resistant and dual-resistant patients. During 30-day follow-up, the patients with clopidogrel resistance and dual resistance had higher incidence of early stent thrombosis (18.2% vs. 1.3%, 40.0% vs. 1.2%, P <0.05). Binary Logistic Regression analysis indicated that dual resistance remained an independent predicator for early stent thrombosis (odds ratio 34.064, 95% CI 1.919–604.656, P=0.016).

Conclusions  Antiplatelet resistance assessed by whole blood impedance aggregometry is paralleled to clinical events, and dual antiplatelet resistance is an independent predicator for early stent thrombosis in patients with acute coronary syndrome. As a physiological assessment of platelet reactivity, whole blood impedance aggregometry is a convenient and accurate option for measuring antiplatelet resistance and hence predicting early stent thrombosis.