1. Articles from Akiko Matsuo

    1-4 of 4
    1. The frequency and clinical characteristics of in-stent restenosis due to calcified nodule development after coronary stent implantation

      The frequency and clinical characteristics of in-stent restenosis due to calcified nodule development after coronary stent implantation

      The purpose of this study was to evaluated the clinical characteristics of calcified nodule-like in-stent restenosis (ISR) lesions using optical coherence tomography (OCT) in vivo. A total of 124 ISR lesions that were treated with a repeat coronary intervention under OCT guidance were included in this analysis. ISR neointimal morphology was classified as “calcified nodule-like ISR”, that appeared as a high-backscattering protruding mass with an irregular surface covered by signal-rich bands, or “non-calcified nodule-like ISR”. The maximum arc and thickness of calcium behind the stent struts was also measured. Of the 124 ISR lesions, calcified nodule-like ISR was observed in ...

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      Mentions: Kenichi Fujii
    2. Cholesterol crystal depth in coronary atherosclerotic plaques: A novel index of plaque vulnerability using optical frequency domain imaging

      Cholesterol crystal depth in coronary atherosclerotic plaques: A novel index of plaque vulnerability using optical frequency domain imaging

      Background The involvement of cholesterol crystals (CCs) in plaque progression and destabilization of atherosclerotic plaques has been recently recognized. This study aimed to evaluate the association between the intraplaque localization of CCs and plaque vulnerability. Methods We investigated 55 acute coronary syndrome (ACS) and 80 stable angina pectoris (stable AP) lesions using optical frequency domain imaging (OFDI) prior to percutaneous coronary intervention. The distance between CCs and the luminal surface of coronary plaques was defined as CC depth. Results Although the incidence of CCs had similar frequencies in the ACS and stable AP groups (95% vs. 89%, p = 0.25 ...

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    3. Optical coherence tomography findings after longitudinal ablation for an underexpanded stent in a heavily calcified lesion: a case repor

      Optical coherence tomography findings after longitudinal ablation for an underexpanded stent in a heavily calcified lesion: a case repor

      Background Heavy coronary artery calcification is responsible for stent underexpansion, which is associated with increased in-stent restenosis. Here we report a case in which optical coherence tomography (OCT) demonstrated that the metal component of an underexpanded stent previously implanted in a heavy calcified lesion had been completely removed after ablation with rotational atherectomy. Case presentation An 83-year-old man with exertional angina was referred to our hospital. Coronary angiography revealed severe stenosis in the proximal portion of the right coronary artery and left circumflex artery and chronic total occlusion (CTO) in the mid portion of the left anterior descending artery (LAD ...

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    4. Optical Coherence Tomography (OCT) Findings of Coronary Computed Tomography Angiography (CTA) Detected Vulnerable Plaque

      Optical Coherence Tomography (OCT) Findings of Coronary Computed Tomography Angiography (CTA) Detected Vulnerable Plaque

      Background: Recently, coronary computed tomography angiography (CTA) findings of positive vessel remodeling (PR) and low-attenuation plaque (LAP) have been reported to be associated with the development of acute coronary syndromes (ACS). The aim of this study was to examine the CTA detected vulnerable plaque characteristics by using intracoronary optical coherence tomography (OCT). Method and Result: A total of 16 patients with 16 lesions underwent PCI by using intracoronary OCT, after coronary CTA examination, were enrolled in this study. The CTA detected vulnerable plaque (CT-VP) was defined as LAP (<30 hounsfield unit (HU)) with PR of at least 110%. The lesions ...

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    1-4 of 4
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    1. (1 articles) Kenichi Fujii
    2. (1 articles) Terumo Corporation
    3. (1 articles) Sun Yat-Sen University
    4. (1 articles) National Institutes of Health
    5. (1 articles) University of Illinois at Urbana-Champaign
    6. (1 articles) Tianjin University
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    Optical Coherence Tomography (OCT) Findings of Coronary Computed Tomography Angiography (CTA) Detected Vulnerable Plaque Optical coherence tomography findings after longitudinal ablation for an underexpanded stent in a heavily calcified lesion: a case repor Cholesterol crystal depth in coronary atherosclerotic plaques: A novel index of plaque vulnerability using optical frequency domain imaging The frequency and clinical characteristics of in-stent restenosis due to calcified nodule development after coronary stent implantation Handheld optical coherence tomography for clinical assessment of dental plaque and gingiva Characterisation of macular superficial vessel density alteration in preclinical ethambutol-induced optic neuropathy using optical coherence tomography angiography Three-dimensional spatial reconstruction of coronary arteries based on fusion of intravascular optical coherence tomography and coronary angiography Dynamic-range compression and contrast enhancement in swept-source optical coherence tomography systems with a frequency gain compensation amplifier Healing and early stent coverage after ultrathin strut biodegradable polymer-coated sirolimus-eluting stent implantation: SiBi optical coherence tomography study Optical coherence tomography angiography of choroidal neovascularization in immune choroiditis following acute retinal necrosis Operation Night Watch: getting closer to Rembrandt despite distancing Anatomical and functional healing after resorbable magnesium scaffold implantation in human coronary vessels: A combined optical coherence tomography and quantitative flow ratio analysis