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1、OCT在ACS中的应用,解放军总医院心内科田 峰,OCT的技术优势,高分辨率:分辨范围320m,约为IVUS的10倍高准确性:结果与组织学特征一致,OCT在ACS中的应用,识别易损斑块 评价罪犯病变特征 评价和指导治疗,易损斑块的形态学特征,结构特征薄纤维帽(65m)大脂质核(40%)核内坏死组织(10%)炎症反应 富含巨噬细胞吞噬 炎症细胞聚集,Kume.Am Heart J.2006,152:755,斑块纤维帽:脂质核心与血液间的屏障,斑块纤维帽厚度:OCT与病理学对比,斑块纤维帽厚度比较,47,53.8,102.6,0,20,40,60,80,100,120,140,160,Min.Ca
2、p Thickness(m),AMI,ACS,SAP,P 0.02,Jang.Bouma.Circulation 2005,OCT易于检出TCFA,45%,18%,65%,0%,10%,20%,30%,40%,50%,60%,70%,80%,TCFA Percent,AMI,ACS,SAP,P 0.01,TCFA:thin-cap fibroatheroma,斑块纤维帽中巨噬细胞,Circulation.2003;107:113-119,OCT:纤维帽中巨噬细胞定量分析,OCT,病理学:CD68标记,r=0.84(P0.0001),OCT评价斑块纤维帽中的巨噬细胞含量敏感性:70%-100%特
3、异性:60%-100%,Circulation.2003;107:113-119,纤维帽巨噬细胞密度,*P 0.001,*,JACC,2004,44(5)972-979,不同位置的相关性,JACC,2004,44(5)972-979,应用OCT评价斑块纤维帽中巨噬细胞与外周血白细胞的相关性研究,Arterioscler Thromb Vasc Biol.2007;27(8):1820-1827,巨噬细胞密度与斑块纤维帽厚度的相关性,Arterioscler Thromb Vasc Biol.2007;27(8):1820-1827,易损斑块常常是多发的,p=0.007,0%,38%,0%,10
4、%,20%,30%,40%,50%,60%,70%,80%,TCFA Percent,AMI,SAP,Kubo T,Am J Cardiol.2010;105(3):318-22,梗死相关及非相关血管均检出TCFA,OCT在ACS中的应用,识别易损斑块 评价罪犯病变特征 评价和指导治疗,OCT识别血栓类型,A.斑块破裂 B.红色血栓 C.白色血栓,Erosion(Ulceration),Thrombus,斑块纤维帽侵蚀及血栓形成,AMI(n=30),Plaque rupture,22(73)*#,SAP(n=63),UAP(n=11),3(27)$,2(3),0.0001,Values are
5、 given as n(%)or mean+SD.p0.05;AMI vs UAP,#p0.001;AMI vs SAP,$p0.005;UAP vs SAP.,p-value,Finding,对比斑块特征:AMI,UAP&SAP,Erosion,Thrombus,Fibrous cap thickness(m),TCFA,7(23)#,30(100)*#,49+21*#,25(83)*#,4(36)$,7(64)$,113+64$,4(36)$,1(2),3(5),305+97,2(3),0.0002,0.0001,0.0001,0.0001,Akasaka,etal,ST/NST-AMI罪
6、犯病变的形态特征,JACC Cardiovasc Interv.2011;4(1):76-82.,OCT在ACS中的应用,识别易损斑块 评价罪犯病变特征 评价和指导治疗,OCT评价他汀对AMI非罪犯斑块的干预效果,40例AMI伴高脂血症,PCI 非PCI干预的脂质斑块 他汀组(n=23);对照组(n=17)OCT:基线、9个月,Atherosclerosis.2009;202(2):491-7,结果,Atherosclerosis.2009;202(2):491-7,um,P0.01,P0.01,OCT预测NST-AMI无复流,Eur Heart J,2009;30(11):1348-55,E
7、ur Heart J,2009;30(11):1348-55,STEMI支架置入后残余血栓,Residual atherothrombotic material after stenting in acute myocardial infarction-An optical coherence tomographic evaluation.Int J Cardiol.2012,First results of the DEB-AMI,随机、多中心、单盲 150例患者,J Am Coll Cardiol.2012;59(25):2327-37.,OCT-based diagnosis and m
8、anagement of STEMI associated with intact fibrous cap,N=31 group 1:dual antiplatelet therapy without stenting,group 2:stenting Follow-up:753 days Results:all patients were asymptomatic,regardless of stent implantation,JACC Cardiovasc Imaging.2013;6(3):283-7,小 结,OCT准确评价易损斑块及ACS的罪犯病变特征 OCT指导治疗决策及精确评价治疗效果 尚需要大样本、多中心的研究进一步证实其价值,谢 谢!,