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In Vivo Evaluation of Tissue Protrusion by Using Optical Coherence Tomography and Coronary Angioscopy Immediately After Stent Implantation

Shunsuke Sakai, Akira Sato, Tomoya Hoshi, Daigo Hiraya, Hiroaki Watabe, Masaki Ieda
Published: 13 October 2020
Circulation Journal ; doi:10.1253/circj.cj-20-0306

Abstract: Background:The relationship between the characteristics of tissue protrusion detected by using optical coherence tomography (OCT) and the findings of coronary angioscopy (CAS) immediately after stent implantation were evaluated. Methods and Results:A total of 186 patients (192 stents) underwent OCT before and after stenting and were observed by using CAS immediately after stenting and at the chronic phase. Patients were assigned to irregular protrusion, smooth protrusion, and disrupted fibrous tissue protrusion groups according to OCT findings. Serum high-sensitivity C-reactive protein (hs-CRP) levels were measured before and after stent implantation. The grade of yellow color (YC) and neointimal coverage (NC), and incidence of thrombus in the stented segment were evaluated by using CAS. After stent implantation, maximum YC grade (smooth, 0.64±0.80; disrupted fibrous tissue, 0.50±0.77; irregular, 1.50±1.09; P
Keywords: optical coherence tomography / Coronary Angioscopy / Tissue Protrusion

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