OBJECTIVE: To verify whether optical coherence tomography (OCT) can accurately monitor the occurrence of arterial healing after stenting. SETTING: Delayed stent endothelialisation may predispose to stent thrombosis. OCT is a high-resolution intravascular imaging technique that accurately identifies stent struts and arterial tissues. DESIGN AND INTERVENTIONS: Eight New Zealand white rabbits underwent the implantation of single bare metal stents (diameter 2-2.5 mm, length 8-13 mm) in the right common carotid artery through the external carotid artery. After a median of 11 days (range 2-28), the stented arteries were visualised by OCT, with images acquired at a pull-back speed of 0.5 mm/sec. The rabbits were then euthanised, vessels were formalin-fixed and finally processed for histopathology. RESULTS: We analysed 32 cross-sections from eight stented carotid arteries, for a total of 384 stent struts. OCT detected all of the stent struts in 30 of 32 cross-sections (93.7%), and correctly identified the presence/absence of tissue for every strut. Histological and OCT measurements of mean neointima thickness (0.135 (SD 0.079) mm and 0.145 (SD 0.085) mm, respectively, p = NS) were similar and closely related (r = 0.85, p<0.001). Neointima area progressively increased with longer time intervals from stent deployment to sacrifice; histological and OCT measurements were similar for each time interval. The intra-observer and interobserver reproducibility of OCT neointima measurements were excellent (R2 = 0.90 and 0.88, respectively). CONCLUSIONS: OCT is a promising means for monitoring stent strut coverage and vessel wall healing in vivo, the relevance of which will become even more significant with the increasing use of drug-eluting stents.
OBJECTIVE: To verify whether optical coherence tomography (OCT) can accurately monitor the occurrence of arterial healing after stenting. SETTING: Delayed stent endothelialisation may predispose to stent thrombosis. OCT is a high-resolution intravascular imaging technique that accurately identifies stent struts and arterial tissues. DESIGN AND INTERVENTIONS: Eight New Zealand white rabbits underwent the implantation of single bare metal stents (diameter 2-2.5 mm, length 8-13 mm) in the right common carotid artery through the external carotid artery. After a median of 11 days (range 2-28), the stented arteries were visualised by OCT, with images acquired at a pull-back speed of 0.5 mm/sec. The rabbits were then euthanised, vessels were formalin-fixed and finally processed for histopathology. RESULTS: We analysed 32 cross-sections from eight stented carotid arteries, for a total of 384 stent struts. OCT detected all of the stent struts in 30 of 32 cross-sections (93.7%), and correctly identified the presence/absence of tissue for every strut. Histological and OCT measurements of mean neointima thickness (0.135 (SD 0.079) mm and 0.145 (SD 0.085) mm, respectively, p = NS) were similar and closely related (r = 0.85, p<0.001). Neointima area progressively increased with longer time intervals from stent deployment to sacrifice; histological and OCT measurements were similar for each time interval. The intra-observer and interobserver reproducibility of OCT neointima measurements were excellent (R2 = 0.90 and 0.88, respectively). CONCLUSIONS: OCT is a promising means for monitoring stent strut coverage and vessel wall healing in vivo, the relevance of which will become even more significant with the increasing use of drug-eluting stents.
Authors: Ran Xu; Qing Zhao; Tao Wang; Yutong Yang; Jichang Luo; Xiao Zhang; Yao Feng; Yan Ma; Adam A Dmytriw; Ge Yang; Shengpan Chen; Bin Yang; Liqun Jiao Journal: Transl Stroke Res Date: 2022-04-21 Impact factor: 6.829
Authors: Christian Templin; Martin Meyer; Maja Franziska Müller; Valentin Djonov; Ruslan Hlushchuk; Ivanka Dimova; Stefanie Flueckiger; Peter Kronen; Michele Sidler; Karina Klein; Flora Nicholls; Jelena-Rima Ghadri; Klaus Weber; Dragica Paunovic; Roberto Corti; Simon P Hoerstrup; Thomas F Lüscher; Ulf Landmesser Journal: Eur Heart J Date: 2010-06-05 Impact factor: 29.983
Authors: J-S Kim; I-K Jang; J-S Kim; T H Kim; M Takano; T Kume; N W Hur; Y-G Ko; D Choi; M-K Hong; Y Jang Journal: Heart Date: 2009-06-16 Impact factor: 5.994