医学
四分位间距
血管内超声
支架
血栓
药物洗脱支架
经皮冠状动脉介入治疗
光学相干层析成像
血栓形成
内科学
放射科
心脏病学
再狭窄
心肌梗塞
作者
Giulio Guagliumi,Vasile Sirbu,Giuseppe Musumeci,Robert Gerber,Giuseppe Biondi‐Zoccai,Hideyuki Ikejima,Elena Ladich,Nikoloz Lortkipanidze,Aleksandre Matiashvili,Orazio Valsecchi,Renu Virmani,Gregg W. Stone
标识
DOI:10.1016/j.jcin.2011.09.018
摘要
This study investigated the role of uncovered stent struts on late stent thrombosis (LST) after drug-eluting stent (DES) implantation with optical coherence tomography (OCT). Autopsy studies have identified delayed healing and lack of endothelialization of DES struts as the hallmarks of LST. DES strut coverage has not previously been examined in vivo in patients with LST. We studied 54 patients, including 18 with DES LST (median 615 days after implant) undergoing emergent percutaneous coronary interventions and 36 matched DES control subjects undergoing routine repeat OCT and intravascular ultrasound (IVUS) who did not experience LST for ≥3 years. Thrombus aspiration was performed during emergent percutaneous coronary intervention before OCT and IVUS assessment. By OCT, patients with LST—compared with control subjects—had a higher percentage of uncovered (median [interquartile range]) (12.27 [5.50 to 23.33] vs. 4.14 [3.00 to 6.22], p < 0.001) and malapposed (4.60 [1.85 to 7.19] vs. 1.81 [0.00 to 2.99], p < 0.001) struts. The mean neointimal thickness was similar in the 2 groups (0.23 ± 0.17 mm vs. 0.17 ± 0.09 mm, p = 0.28). By IVUS, stent expansion was comparable in the 2 groups, although positive remodeling was increased in patients with LST (mean vessel cross-section area 19.4 ± 5.8 mm2 vs. 15.1 ± 4.6 mm2, p = 0.003). Thrombus aspiration demonstrated neutrophils and eosinophils in most cases. By multivariable analysis, the length of segment with uncovered stent struts by OCT and the remodeling index by IVUS were independent predictors of LST. In this in vivo case-controlled study, the presence of uncovered stent struts as assessed by OCT and positive vessel remodeling as imaged by IVUS were associated with LST after DES.
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