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血浆纤维蛋白凝块特性的改变与支架内血栓形成有关。

Altered plasma fibrin clot properties are associated with in-stent thrombosis.

机构信息

Institute of Cardiology, Jagiellonian University School of Medicine, 31-202 Cracow, Poland.

出版信息

Arterioscler Thromb Vasc Biol. 2010 Feb;30(2):276-82. doi: 10.1161/ATVBAHA.109.194936. Epub 2009 Nov 12.

DOI:10.1161/ATVBAHA.109.194936
PMID:19910643
Abstract

OBJECTIVE

We sought to investigate whether patients with in-stent thrombosis (IST) display altered plasma fibrin clot properties.

METHODS AND RESULTS

We studied 47 definite IST patients, including 15 with acute, 26 subacute and 6 late IST, and 48 controls matched for demographics, cardiovascular risk factors, concomitant treatment and angiographic/stent parameters. Plasma clot permeability (K(s)), which indicates a pore size, turbidity (lag phase, indicating the rate of fibrin clot formation, DeltaAbs(max), maximum absorbance of a fibrin gel, reflecting the fiber thickness), lysis time (t(50%)) and maximum rate of D-dimer release from clots (D-D(rate)) were determined 2 to 73 (median 14.7) months after IST. Patients with IST had 21% lower K(s), 14% higher DeltaAbs(max), 11% lower D-D(rate), 30% longer t(50%) (all P<0.0001) and 5% shorter lag phase compared to controls (P=0.042). There were no correlations between clot variables and the time of IST or that from IST to blood sampling. Multiple regression analysis showed that K(s) (odds ratio=0.36 per 0.1 microm(2), P<0.001), D-D(rate) (odds ratio=0.16 per 0.01 mg/L/min, P<0.001) and stent length (odds ratio=1.1 per 1 mm, P=0.043) were independent predictors of IST (R(2)=0.58, P<0.001).

CONCLUSIONS

IST patients tend to form dense fibrin clots resistant to lysis, and altered plasma fibrin clot features might contribute to the occurrence of IST.

摘要

目的

本研究旨在探讨支架内血栓(IST)患者的血浆纤维蛋白凝块特性是否发生改变。

方法和结果

本研究共纳入 47 例确诊 IST 患者,其中急性 IST 患者 15 例,亚急性 IST 患者 26 例,迟发性 IST 患者 6 例,并选择 48 例具有相似人口统计学、心血管危险因素、合并治疗和支架参数的对照患者。分别于 IST 后 2-73 个月(中位数 14.7 个月)检测血浆纤维蛋白凝块的通透性(K(s))、浊度(反映纤维蛋白凝块形成速度的迟滞期,Lag phase)、最大吸光度(DeltaAbs(max))、纤维蛋白凝胶的最大吸光度(反映纤维厚度)、纤维蛋白溶解时间(t(50%))和最大 D-二聚体释放速率(D-D(rate))。与对照组相比,IST 患者的 K(s)降低 21%(P<0.0001),DeltaAbs(max)升高 14%(P<0.0001),D-D(rate)降低 11%(P<0.0001),t(50%)延长 30%(P<0.0001),Lag phase 缩短 5%(P=0.042)。纤维蛋白凝块的各项指标与 IST 时间或 IST 至采血时间之间均无相关性。多元回归分析显示,K(s)(每增加 0.1μm2,比值比=0.36,P<0.001)、D-D(rate)(每增加 0.01mg/L/min,比值比=0.16,P<0.001)和支架长度(每增加 1mm,比值比=1.1,P=0.043)是 IST 的独立预测因素(R(2)=0.58,P<0.001)。

结论

IST 患者倾向于形成致密的纤维蛋白凝块,抵抗溶解,而改变的血浆纤维蛋白凝块特征可能导致 IST 的发生。

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