急性冠状动脉综合征患者平均血小板体积的变化及相关因素研究

目的观察急性冠状动脉综合征(ACS)患者平均血小板体积(MPV)的变化及其相关因素。方法选取接受冠状动脉造影的ACS患者195例,慢性稳定型心绞痛(SA)患者48例和非冠心病对照73例。ACS包括非ST段抬高型ACS(NSTEACS)114例和ST段抬高型心肌梗死(STEMI)81例,又分为合并糖尿病患者66例和未合并糖尿病患者129例。测定MPV、血小板压积(PCT)等。结果与对照组[(9.59±1.40)fl]和SA组[(9.61±1.42)fl]比较,ACS组[(10.19±1.26)fl]、NSTEACS亚组[(10.12±1.35)fl]和STEMI亚组[(10.29±1.33)fl]的MPV均显著升高(均为P<0.01);与对照组(45.2%±49.9%)和SA组(49.6%±55.4%)比较,ACS组(33.1%±35.4%)及STEMI亚组(29.9%±29.8%)的PCT均显著降低(均为P<0.05);合并糖尿病亚组MPV显著高于未合并糖尿病亚组[(10.48±1.29)fl比(10.05±1.23)fl,P<0.05];多元回归分析显示,血清高敏C反应蛋白(hsCRP)和HDL-C是MPV的独立影响因素(r=0.209,-0.191,均为P<0.01)。结论ACS患者MPV显著升高,糖尿病、血清hsCRP水平和HDL-C与MPV的升高有密切关系。     

高血压患者平均血小板体积和血清高敏C反应蛋白水平的变化及相关关系

目的 观察高血压患者平均血小板体积(MPV)和血清高敏C反应蛋白(hsCRP)水平的变化及相关关系.方法 单纯原发性高血压患者106例和健康对照22例,测定MPV、血清hsCRP和尿微量白蛋白.微量白蛋白尿(MAU)的定义是尿微量白蛋白＞19 mg/L.根据尿微量白蛋白结果将高血压患者分为非MAU亚组79例和MAU亚组...     

平均血小板体积与冠心病的相关性

目的通过分析不同类型冠心病患者的平均血小板体积水平,研究平均血小板体积和冠心病的相关性。方法 237例接受冠脉造影的患者分为3组:急性冠脉综合征、稳定型心绞痛和非冠心病组。冠心病的诊断标准为至少1根血管狭窄50%,所有的冠脉造影图像是由两个医生(双盲情况下)完成。对所有入选患者测量其平均血小板体积。结果与非冠心病组相比,急性冠脉综合征组平均血小板体积显著增高(P0.05);平均血小板体积在稳定型心绞痛组与急性冠脉综合征及非冠心病组患者之间无显著差异(P0.05)。结论平均血小板体积与冠心病存在显著相关性,但与冠心病的程度无显著相关性。     

2型糖尿病伴冠心病患者平均血小板体积的影响因素研究

目的:研究血糖和血脂等对合并2型糖尿病(DM)冠心病患者平均血小板体积(MPV)的影响。方法:冠状动脉造影等确诊的无糖代谢异常冠心病患者(非DM组)115例,合并DM的冠心病患者(DM组)183例,测定外周血MPV等血小板参数和其他常规实验室指标,分析合并DM冠心病患者MPV的变化及血糖和血脂等对MPV的影响。结果:MPV于DM组显著高于非DM组[(10.30±0.88)vs.(10.04±1.03)fL,P<0.05];DM组患者各亚组间比较,肥胖亚组显著高于非肥胖亚组[(10.51±0.77)vs.(10.21±0.91)fL,P<0.05],既往DM亚组显著高于新诊断DM亚组[(10.41±0.88)vs.(10.14±0.85)fL,P<0.05],HbA1c高值(HbA1c≥7%)亚组显著高于HbA1c低值(HbA1c<7%)亚组[(10.47±0.76)vs.(10.16±0.94)fL,P<0.05];MPV分别与体质量指数(BMI)(r=0.149,P=0.044)、空腹血糖(FBG)(r=0.191,P=0.009)、HbA1c(r=0.189,P=0.01)、hs-CRP(r=0.146,P=0.048)和白细胞计数(WBC)(r=0.169,P=0.022)显著正相关,与HDL-C显著负相关(r=-0.143,P=0.053);多元回归分析显示,对MPV有独立影响的因素是HDL-C、HbA1c、hs-CRP和FBG(均P<0.05)。结论:DM冠心病患者MPV进一步升高,MPV的升高与HDL-C、HbA1c、hs-CRP和FBG有密切关系。     

急性冠脉综合征血小板平均体积的相关性研究

目的观察急性冠脉综合征（acutecoronarysyndrome,ACS）患者平均血小板体积（meanplateletvolume,MPV）的变化及其影响因素。方法测定230例接受冠状动脉造影的ACS患者,55例慢性稳定型心绞痛（SA）患者和91例非冠状动脉粥样硬化性心脏病对照患者的MPV、血小板压积等实验室检查指标并行超声心动图检查,对所得数据进行统计学分析。ACS患者包括非sT段抬高性ACS（nonSTelevatedACS,NSTEACS）亚组135例和急性sT段抬高性心肌梗死（acutemyocardialinfarction。AMI）亚组95例。结果ACS组[（10．26±1．19）fL135．（9．79±1．37）fL,P〈0．05;（10．26±1．19）fLvs（9．72±1．40）fL,P〈0．05]及NSTEACS亚组J（10．19±1．24）fLvs．（9．79±1．37）fL,P〈0．05;（10．19±1．24）fL％（9．72±1．40）fL,P〈0．05]和AMI亚组[（10．35±1．11）fL％（9．79±1．37）fL,P〈0．05;（10．35±1．11）fLUS．（9．72±1．40）fL,P〈0．05]的MPV显著高于对照组和sA组,差异有统计学意义。ACS组10．21（0．08）％VS．0．23（0．08）％,P〈0．05;0．21（0．08）％vs．0．24（0．10）％,P〈0．05]、NSTEACS亚组[0．21（0．09）％vs．0．23（0．08）％,P〈0．05;0．21（0．09）％vs．0．24（0．10）％,P〈0．05]及AMI亚组[0．21（0．08）％vs．0．23（0．08）％,P〈0．05;0．21（0．08）％眠0．24（0．10）％,P〈0．05]的血小板压积显著低于对照组和sA组,差异有统计学意义。ACS患者MPV与高密度脂蛋白胆固醇呈负相关（r=-0．175,P=0．008）,与高敏c反应蛋白呈正相关（r=0．181,P=0．008）,与左心室射血分数负相关（r=-0．157,P=0．017）。多元线性回归分析显示,MPV的预测因素依次是糖尿病、高敏C反应蛋白、左心室射血分数和高密度脂蛋白胆固醇（均P〈0．01）。结论ACS患者MPV显著升高,糖尿病、高敏C反应蛋白、左心室射血分数和高密度脂蛋白胆固醇与MPV的升高有密切关系。     

平均血小板体积/血小板计数比值与冠心病的相关性

目的 分析平均血小板体积/血小板计数比值(MPV/PLT)与冠心病的相关性.方法 回顾性分析长春中医药大学附属医院住院部冠心病患者311例为观察组,其中包括稳定型心绞痛(SAP)组、不稳定型心绞痛(UAP)组和急性心肌梗死(AMI)组,并抽取同期健康体检者为对照组,测定观察组和对照组PLT、MPV,并计算MPV/PLT...     

冠心病患者血小板聚集功能与炎症因子关系的研究

目的:探讨冠心病患者血小板聚集功能与炎症因子的关系.方法:按照标准入选150例住院治疗的冠心病患者及53例查体健康人(正常对照组).冠心病患者在基础治疗相同的情况下按美国心脏病学会/美国心脏病协会(ACC/AHA)治疗指南分为稳定性心绞痛(SAP)组47例(阿司匹林100 mg/d),不稳定性心绞痛(UAP)组50例(阿司匹林100 mg/d+达肝素5000U Q12h皮下注射),急性心肌梗死(AMI)组53例(阿司匹林100 mg/d+氯吡格雷75 mg/d+达肝素5000U Q12h皮下注射).正常对照组和所有患者入院即刻肘静脉取血,测定空腹血糖、血脂全项、血常规、血小板最大聚集率、尿11-脱氢-血栓素B_2含量、血浆高敏C反应蛋白(hsCRP).结果:AMI组血浆hsCRP水平高于UAP组[(15.46±8.22)mg/L,(7.61±6.11)mg/L P<0.01)]、UAP组高于SAP组[(7.61±6.11)mg/L,(4.25±2.95)mg/L P<0.01]、SAP组高于正常对照组[(4.25±2.95)mg/L,(2.07±1.28)mg/L P<0.05],差异均有统计学意义.二磷酸腺苷诱导的血小板最大聚集率在UAP组、AMI组显著高于正常对照组及SAP组(P<0.05),UAP组与AMI组间、SAP组与正常对照组间血小板最大聚集率无显著差异(P>0.05).花生四烯酸诱导的血小板最大聚集率和尿11-脱氢-血栓素B_2含量在各组间均有显著差异(P<0.05).血浆hsCRP水平与二磷酸腺苷诱导血小板最大聚集率呈显著的正相关(r=0.473,P=0.000);与花生四烯酸诱导血小板最大聚集率呈显著的正相关(r=0.434,P=0.000);与尿11-脱氢-血栓素B_2的含量呈显著的正相关(r=0.554,P=0.000).结论:冠心病患者体内炎症反应与血小板活化状态存在紧密关联,两者共同影响着冠心病的严重程度和稳定状态,是评价冠心病临床状态的检测指标,早期有效抗血小板治疗和减轻炎症反应会有效控制急性冠脉综合征的发生发展.     

无传统危险因素的冠心病患者心肌梗死相关危险因素分析

目的探讨无传统心血管危险因素的冠心病患者发生心肌梗死(MI)的独立危险因素。方法纳入2013年1月1日至2013年12月31日以及2017年1月1日至2018年12月31日在中国医学科学院阜外医院接受冠脉造影检查的所有患者共74612例,排除冠状动脉粥样硬化性心脏病(CHD)、合并高血压、糖尿病、高脂血症或有吸烟史的患者后,共604例患者纳入分析。根据既往病史、冠脉造影、实验室及影像学检查结果,分为无传统心血管危险因素冠心病非心肌梗死组(非心肌梗死组,n=479);和无传统心血管危险因素冠心病心肌梗死组(心肌梗死组,n=125)。收集患者基线资料、实验室检查结果,通过多因素Logistic回归模型,探讨无传统心血管危险因素冠心病人群发生心肌梗死的独立危险因素。结果与非心肌梗死组相比,心肌梗死组男性患者更多、左室射血分数(EF)更低,N端脑钠肽前体(NT-proBNP)、高敏C反应蛋白(hsCRP)、血白细胞(WBC)、血肌酐(Scr)更高。两组患者有统计意义的差异化验指标进入多因素Logistic回归分析,校正混杂因素后,hsCRP仍与无传统心血管危险因素心肌梗死的发病风险呈正相关,且有显著统计学意义(OR=1.101,95%CI:1.026-1.180,P=0.007)。ROC曲线下面积为0.584有统计学意义(P=0.004)。此外,在不同年龄及性别亚组,均有心梗组hsCRP高于非心梗组的趋势。结论本研究发现hsCRP与无传统心血管危险因素冠心病患者发生心肌梗死的风险呈正相关。因此hsCRP可能是冠心病患者发生心肌梗死的新型危险因素,并为预防心肌梗死发生的新靶点提供线索。     

2型糖尿病患者平均血小板体积与冠心病的关系

目的 观察2型糖尿病合并冠心病患者平均血小板体积（MPV）的变化及相关影响因素.方法 接受冠脉造影的2型糖尿病患者495例,其中合并冠心病者307例（合并冠心病组）,无冠心病等大血管病变者（未合并冠心病组）188例.入院时测定MPV、血生化等参数,计算冠脉病变血管支数和Gensini积分.结果 合并冠心病组MPV显著高于未合并冠心病组（P＜0.05）.据MPV将合并冠心病组患者分为MPV低值组（MPV≤9.9fL）、中值组（9.9 fL＞ MPV≤10.6 fL）和高值组（MPV＞ 10.6 fL）,高值组急性冠脉综合征、多支病变、Gensini积分、体重指数、空腹血糖和糖化血红蛋白（HbA1c）显著高于低值组（P＜0.05或P＜0.01）,高密度脂蛋白胆固醇（HDL-C）显著低于低值组（P＜0.05）.多重线性回归分析显示,合并冠心病组患者Gensini积分、多支病变、HbA1c和空腹血糖与MPV显著独立正相关,HDL-C与MPV显著独立负相关.非条件Logistic分析显示,MPV是2型糖尿病合并冠心病的危险因素.结论 2型糖尿病合并冠心病患者MPV显著升高,与冠脉病变严重程度、糖代谢和HDL-C密切相关,MPV是2型糖尿病合并冠心病的危险因素.     

幽门螺杆菌和平均血小板体积与冠心病相关性分析

【】 目的 探讨幽门螺杆菌感染(helicobacter pylori infection)和平均血小板体积(mean platelet volume MPV)与冠状动脉粥样硬化性心脏病(coronary artery disease CAD)的相关性。方法 根据冠脉造影(coronary angiography CAG)的结果,将292例研究对象分为对照组143例和冠心病组149例。冠心病组根据病变支数又分为单支病变38例、双支病变46例、多支病变65支。所有病例均行13C-呼气试验、血浆helicobacter pylori抗体(helicobacter pylori IgG)测定及各组血液平均血小板体积,并计算冠心病组Gensini积分;同时收集病史、尿酸、血脂、高敏C反应蛋白、糖化血红蛋白等指标,评价helicobacter pylori感染值、MPV水平与冠心病的相关性。结果 1、两组患者吸烟、年龄、低密度脂蛋白、高敏C反应蛋白、同型半胱氨酸比较有统计学差异(P<0.05);2、冠心病组helicobacter pylori感染值、MPV及Gensini积分明显高于对照组(P<0.05);3、helicobacter pylori感染值、MPV及Gensini积分随着病变血管数增加而升高(P<0.05);4、helicobacter pylori感染值与Gensini积分呈正相关(r=0.869,P<0.01),MPV与Gensini积分亦呈正相关(r=0.881,P<0.01),helicobacter pylori感染值与MPV呈正相关(r=0.853,P<0.01)。结论：helicobacter pylori感染值和MPV水平对冠心病有一定的预测价值。     

冠心病患者血清内脏脂肪素水平的变化及其影响因素的研究

目的:了解冠心病患者血清内脏脂肪素(visfatin)水平的变化及其影响因素.方法:观测70例冠心病患者(冠心病组)和18例健康对照(对照组)血清内脏脂肪素水平和其他临床生化指标,分析血清内脏脂肪素的变化及其影响因素.结果:冠心病组血清内脏脂肪素显著高于对照组;合并糖尿病的冠心病患者显著高于没有合并糖代谢异常的患者;冠心病患者血清内脏脂肪素与体重指数、高密度脂蛋白胆固醇(HDL-C)、胰岛素抵抗指数(HOMA-RI)显著正相关,与甘油三酯显著负相关;多因素回归分析显示,胰岛素抵抗指数和体重指数是血清内脏脂肪素的独立影响因素.结论:冠心病患者血清内脏脂肪素水平显著升高,胰岛素抵抗指数和体重指数是其升高的独立影响因素.     

平均血小板体积与血小板体积分布宽度联合对稳定性冠状动脉疾病远期预后的价值

目的:评估入院时平均血小板体积(MPV)及血小板体积分布宽度(PDW)联合对接受择期经皮冠状动脉介入治疗(PCI)的稳定性冠状动脉疾病患者远期预后的预测价值。方法:本研究共纳入4293例患者,根据MPV及PDW的中位数,将患者分为3组:低(MPV+PDW)组(n=2019);MPV+PDW异常组(即高MPV+低PDW或低MPV+高PDW,简称MPV+PDW异常组,n=333);高(MPV+PDW)组(n=1941)。应用多因素Cox回归分析比较不同组别与远期预后的相关性。结果:基线资料分析表明,与低(MPV+PDW)组患者相比,高(MPV+PDW)组患者合并糖尿病者更多,左心室射血分数(LVEF)和估算肾小球滤过率(eGFR)更低,糖化血红蛋白更高,使用β受体阻滞剂比例更低(P均<0.05)。与低(MPV+PDW)组比较,高(MPV+PDW)组患者心原性死亡率更高[17(0.9%)vs 5(0.2%),P=0.021],全因死亡发生率有升高趋势,但差异无统计学意义[25(1.3%)vs 16(0.8%),P=0.298]。Kaplan-Meier分析表明,高(MPV+PDW)组患者心原性死亡发生率显著高于其他组别(log-rank P=0.022)。多因素Cox回归分析表明,接受PCI的稳定性冠状动脉疾病患者中,高(MPV+PDW)组患者的2年心原性死亡的发生风险显著高于低(MPV+PDW)组患者(HR=3.497,95%CI:1.155~10.586,P=0.027)。结论:在接受择期PCI的稳定性冠状动脉疾病患者中,高MPV高PDW与远期预后不良相关。     

Increased Platelet Reactivity and Circulating Monocyte-Platelet Aggregates in Patients With Stable Coronary Artery Disease

Objectives. We sought to examine whether patients with stable coronary artery disease (CAD) have increased platelet reactivity and an enhanced propensity to form monocyte-platelet aggregates.Background. Platelet-dependent thrombosis and leukocyte infiltration into the vessel wall are characteristic cellular events seen in atherosclerosis.Methods. Anticoagulated peripheral venous blood from 19 patients with stable CAD and 19 normal control subjects was incubated with or without various platelet agonists and analyzed by whole blood flow cytometry.Results. Circulating degranulated platelets were increased in patients with CAD compared with control subjects (mean [±SEM] percent P-selectin–positive platelets: 2.1 ± 0.2 vs. 1.5 ± 0.2, p < 0.01) and were more reactive to stimulation with 1 μmol/liter of adenosine diphosphate (ADP) (28.7 ± 3.9 vs. 16.1 ± 2.2, p < 0.01), 1 μmol/liter of ADP/epinephrine (51.4 ± 4.6 vs. 37.5 ± 3.8, p < 0.05) or 5 μmol/liter of thrombin receptor agonist peptide (TRAP) (65.7 ± 6.8 vs. 20.2 ± 5.1, p < 0.01). Patients with stable CAD also had increased circulating monocyte-platelet aggregates compared with control subjects (percent platelet-positive monocytes: 15.3 ± 3.0 vs. 6.3 ± 0.9, p < 0.01). Furthermore, patients with stable CAD formed more monocyte-platelet aggregates than did control subjects when their whole blood was stimulated with 1 μmol/liter of ADP (50.4 ± 4.5 vs. 28.1 ± 5.3, p < 0.01), 1 μmol/liter of ADP/epinephrine (60.7 ± 4.3 vs. 48.0 ± 4.8, p < 0.05) or 5 μmol/liter of TRAP (67.6 ± 5.7 vs. 34.3 ± 7.0, p < 0.01).Conclusions. Patients with stable CAD have circulating activated platelets, circulating monocyte-platelet aggregates, increased platelet reactivity and an increased propensity to form monocyte-platelet aggregates.     

冠状动脉支架术对冠心病患者血小板活化功能的影响

目的探讨冠心病患者行冠状动脉内支架置入术前后血小板活化指标的变化,了解冠心病不同临床类型支架置入数与血小板活化指标之间的关系。方法利用流式细胞术和单克隆抗体测定48例稳定型心绞痛、45例不稳定型心绞痛患者与37例急性心肌梗死患者外周血中血小板膜糖蛋白CD62p、CD63和凝血酶敏感蛋白的阳性表达率,并与45例冠状动脉造影正常者作对照分析。结果稳定型心绞痛患者、不稳定型心绞痛患者和急性心肌梗死患者支架置入后CD62p、CD63和凝血酶敏感蛋白的阳性表达率均显著高于支架置入前(P<0.01);不稳定型心绞痛组和急性心肌梗死组治疗前亦高于对照组(P<0.01),而稳定型心绞痛组治疗前与对照组比较差异无显著性(P>0.05)。稳定型心绞痛组和不稳定型心绞痛组CD62p、CD63和凝血酶敏感蛋白的阳性表达率与支架置入个数有关,置入支架越多阳性表达率越高。结论不稳定型心绞痛患者及急性心肌梗死患者存在血小板高活化状态、动脉粥样硬化斑块破裂以及急性血栓形成。支架置入术对冠状动脉内皮的损伤加强了血小板的活化,增加了血栓形成的风险。     

Sex Differences in Compositional Plaque Volume Progression in Patients With Coronary Artery Disease

ObjectivesThis study sought to explore sex-based differences in total and compositional plaque volume (PV) progression.BackgroundIt is unclear whether sex has an impact on PV progression in patients with coronary artery disease (CAD).MethodsThe study analyzed a prospective multinational registry of consecutive patients with suspected CAD who underwent 2 or more clinically indicated coronary computed tomography angiography (CTA) at ≥2-year intervals. Total and compositional PV at baseline and follow-up were quantitatively analyzed and normalized using the analyzed total vessel length. Multivariate linear regression models were constructed.ResultsOf the 1,255 patients included (median coronary CTA interval 3.8 years), 543 were women and 712 were men. Women were older (62 ± 9 years of age vs. 59 ± 9 years of age; p < 0.001) and had higher total cholesterol levels (195 ± 41 mg/dl vs. 187 ± 39 mg/dl; p = 0.002). Prevalence of hypertension, diabetes, and family history of CAD were not different (all p > 0.05). At baseline, men possessed greater total PV (31.3 mm³ [interquartile range (IQR): 0 to 121.8 mm³] vs. 56.7 mm³ [IQR: 6.8 to 152.1 mm³] p = 0.005), and there was an approximately 9-year delay in women in developing total PV than in men. The prevalence of high-risk plaques was greater in men than women (31% vs. 20%; p < 0.001). In multivariate analysis, after adjusting for age, clinical risk factors, medication use, and total PV at baseline, despite similar total PV progression rates, female sex was associated with greater calcified PV progression (β = 2.83; p = 0.004) but slower noncalcified PV progression (β = –3.39; p = 0.008) and less development of high-risk plaques (β = –0.18; p = 0.049) than in men.ConclusionsThe compositional PV progression differed according to sex, suggesting that comprehensive plaque evaluation may contribute to further refining of risk stratification according to sex. (NCT02803411).     

冠心病患者冠状动脉病变严重程度与冠心病危险因素的相关分析

目的:研究冠心病患者的冠心病危险因素的特点及临床表现,探讨冠状动脉病变严重程度与冠心病危险因素相关性。方法:行冠脉造影的连续住院的患者731例。通过冠脉造影确定为冠心病者674例为冠心病组,57例冠状动脉粥样硬化患者狭窄程度<50%者为对照组。记录纳入样本的临床资料,分析心血管病危险因素,包括高敏C-反应蛋白hs-CRP水平、左心室射血分数等。分析冠心病危险因素与冠脉狭窄程度的关系。结果:冠心病组患者中男性、2型糖尿病和吸烟与冠心病相关[P均=0.00,OR(95%CI)分别为18.692(12.599～27.733)、17.533(10.421～29.500)和48.200(19.982～116.854)]。2型糖尿病,吸烟与冠脉病变严重程度相关[P均=0.00,OR(95%CI)分别为7.18(1.528～2.220)、10.09(1.998～2.527)]。冠心病患者伴随左心室射血功能减退[P=0.00,OR为1.041,95%CI(1.036～1.045)],肌酐清除率下降[P=0.00,OR为2.051,95%CI(5.137～17.594)],hs-CRP水平升高[P=0.00,OR为2.125,95%CI(1.863～2.423)],而且这些参数变化与冠脉病变严重程度相关。结论:在传统的冠心病危险因素中,吸烟、男性及2型糖尿病与冠心病患者联系更加紧密,而且心肾功能下降和hs-CRP水平升高与冠脉病变严重程度具有一定相关性。     

Intravascular Polarimetry in Patients With Coronary Artery Disease

ObjectivesThe aims of this first-in-human pilot study of intravascular polarimetry were to investigate polarization properties of coronary plaques in patients and to examine the relationship of these features with established structural characteristics available to conventional optical frequency domain imaging (OFDI) and with clinical presentation.BackgroundPolarization-sensitive OFDI measures birefringence and depolarization of tissue together with conventional cross-sectional optical frequency domain images of subsurface microstructure.MethodsThirty patients undergoing polarization-sensitive OFDI (acute coronary syndrome, n = 12; stable angina pectoris, n = 18) participated in this study. Three hundred forty-two cross-sectional images evenly distributed along all imaged coronary arteries were classified into 1 of 7 plaque categories according to conventional OFDI. Polarization features averaged over the entire intimal area of each cross section were compared among plaque types and with structural parameters. Furthermore, the polarization properties in cross sections (n = 244) of the fibrous caps of acute coronary syndrome and stable angina pectoris culprit lesions were assessed and compared with structural features using a generalized linear model.ResultsThe median birefringence and depolarization showed statistically significant differences among plaque types (p < 0.001 for both, one-way analysis of variance). Depolarization differed significantly among individual plaque types (p < 0.05), except between normal arteries and fibrous plaques and between fibrofatty and fibrocalcified plaques. Caps of acute coronary syndrome lesions and ruptured caps exhibited lower birefringence than caps of stable angina pectoris lesions (p < 0.01). In addition to clinical presentation, cap birefringence was also associated with macrophage accumulation as assessed using normalized SD.ConclusionsIntravascular polarimetry provides quantitative metrics that help characterize coronary arterial tissues and may offer refined insight into coronary arterial atherosclerotic lesions in patients.