Evaluation of the late stent malapposition after drug-during stent implantation by optical coherence tomography
10.3760/cma.j.issn.0253-3758.2009.07.004
- VernacularTitle:光学相干断层成像评价药物洗脱支架置入术后晚期支架贴壁不良
- Author:
Feng TIAN
1
;
Yun-Dai CHEN
;
Zhi-Jun SUN
;
Lian CHEN
;
Hong-Bin LIU
;
Ting-Shu YANG
;
Chang-Fu LIU
;
Qin-Hua JIN
;
Qi-Cai BAI
Author Information
1. 解放军总医院
- Keywords:
Coronary disease;
Tomography,optical coherence;
Stents
- From:
Chinese Journal of Cardiology
2009;37(7):585-589
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the characteristic of late stent malapposition after drug-eluting stent implantation by optical coherence tomography (OCT). Methods The study comprised of 32 patients (target vessels: 51, total stents: 71) underwent drug eluting stent implantation one year ago[average (14.8±5.2) months]. OCT images of the stent were analyzed at interval of 0. 5 mm. The stent malapposition was detected, the thickness of intima and gap between the stem strut and vessel wall were measured. Results Stent malapposition was detected in 7 patients without clinical cardiac events, including positive remodeling (n =4), overlapping stents (n = 1) and stent struts covered with thrombus (n = 2). Stent strut apposition with complete intima coverage was about 97.6%, stent struts malapposition was 2.4% including half of struts located at the ostium of side branch. The intima coverage of stent struts is similar between the struts at the side branch and others[(0.06 ± 0.05) mm vs. (0.05 ± 0.03) mm, P > 0.05]. Conclusion The causes of late stem malapposition include the primary malapposition after stent implantation, positive remodeling, overlapping stents and stent struts located at the astium of side branch.Thinner infima coverage was also observed on the stent struts with malapposition.
