Angioscopic Assessment of Peri-Stent Contrast Staining Following Drug-Eluting Stent Implantation

作者：Ishihara Takayuki; Awata Masaki^*; Fujita Masashi; Watanabe Tetsuya; Iida Osamu; Ishida Yoshio; Nanto Shinsuke; Uematsu Masaaki

来源：Circulation Journal, 2014, 78(1): 122-127.

DOI：10.1253/circj.CJ-13-0464

• Angioscopy
• Drug-eluting stent (DES)
• Thrombus

Background: Peri-stent contrast staining (PSS) has been recognized as a predictor of late stent thrombosis following drug-eluting stent (DES) implantation. However, the intravascular conditions at PSS sites remain unclear.
Methods and Results: We evaluated 10 patients (median age 72 years, 80% male) with stable angina pectoris by coronary angioscopy. The patients had a total of 11 DES implantations (5 sirolimus-eluting stents; 4 paclitaxel-eluting stents; 2 everolimus-eluting stents) that showed PSS. Neointimal coverage (NI), presence of thrombus, and yellow plaques underneath the stent were compared between PSS and non-PSS sites for each stent. NIC was graded as: grade 0, struts exposed; grade 1, struts bulging into the lumen, although covered; grade 2, struts embedded by neointima, but translucent; grade 3, struts fully embedded and invisible. Mean follow-up was 394 206 days (median: 289). NIC grade was lower at PSS sites (P=0.021) with 8 out of 11 stents (73%) having grade 0. Angioscopy detected a thrombus more frequently at PSS sites than at non-PSS sites (64% vs. 9%, P=0.012). Yellow plaques tended to be more significant at PSS sites than at non-PSS sites (82% vs. 45%, P=0.091).
Conclusions: The angioscopic findings suggest high thrombogenicity at PSS sites.

• 出版日期2014-1