1. Articles from takahiro okumura

    1-3 of 3
    1. Association of cardiorespiratory fitness with characteristics of coronary plaque: Assessment using integrated backscatter intravascular ultrasound and optical coherence tomography

      Association of cardiorespiratory fitness with characteristics of coronary plaque: Assessment using integrated backscatter intravascular ultrasound and optical coherence tomography
      Background Cardiorespiratory fitness (CRF) can predict future cardiovascular disease. Rupture of vulnerable plaque which often has a large lipid core with a thin fibrous cap causes acute coronary syndrome including sudden cardiac death. We tested our hypothesis that preserved CRF is associated with low lipid composition and thick fibrous cap thickness of coronary lesions. Methods We prospectively performed both integrated backscatter intravascular ultrasound (IB-IVUS) and optical coherence tomography (OCT) for 77 non-culprit coronary lesions in 77 consecutive angina pectoris patients who underwent percutaneous coronary intervention (PCI). Percentage of achieved of predicted peak oxygen consumption (%PPeak Vo2) calculated based on measured ...
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    2. OCT Assessment of Thin-Cap Fibroatheroma Distribution in Native Coronary Arteries

      OCT Assessment of Thin-Cap Fibroatheroma Distribution in Native Coronary Arteries

      Objectives We evaluated the geographic distribution of thin-cap fibroatheromas (TCFAs) in the coronary arteries using optical coherence tomography (OCT), a high-resolution imaging modality. Background Plaque rupture is the most frequent cause of acute myocardial infarction (AMI). It has been recognized that TCFA is the primary plaque type at the site of plaque rupture. Methods We performed 3-vessel OCT examinations in 55 patients: 35 AMI and 20 stable angina pectoris patients. The criteria for TCFA in an OCT image was a lipid-rich plaque with fibrotic cap thickness <65 µm. The distance between each TCFA location and the respective coronary artery ostium ...

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    3. Frequency and Predictor of Coronary Thin-Cap Fibroatheroma in Patients With Acute Myocardial Infarction and Stable Angina Pectoris: A 3-Vessel Optical Coherence Tomography Study

      Frequency and Predictor of Coronary Thin-Cap Fibroatheroma in Patients With Acute Myocardial Infarction and Stable Angina Pectoris: A 3-Vessel Optical Coherence Tomography Study

      (A) A 90% stenosis observed in the middle left anterior descending artery in patients with stable angina pectoris (arrow). (B) Lipid-rich plaque (L) covered by thin fibrous cap (63.3 µm) (arrowheads) observed in the target lesion of a patient with stable angina pectoris. (C) Lipid-rich plaque (L) covered by thin fibrous cap (arrowheads) detected in the noninfarct-related lesion of an acute myocardial infarction patient. (D) Magnification of (C). The thickness of the fibrous cap that existed betw

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    1-3 of 3
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    1. (2 articles) Mitsumasa Ohyanagi
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    Frequency and Predictor of Coronary Thin-Cap Fibroatheroma in Patients With Acute Myocardial Infarction and Stable Angina Pectoris: A 3-Vessel Optical Coherence Tomography Study OCT Assessment of Thin-Cap Fibroatheroma Distribution in Native Coronary Arteries Association of cardiorespiratory fitness with characteristics of coronary plaque: Assessment using integrated backscatter intravascular ultrasound and optical coherence tomography Line-field confocal optical coherence tomography-Practical applications in dermatology and comparison with established imaging methods Optical coherence tomography detection of changes in inner retinal and choroidal thicknesses in patients with early retinitis pigmentosa Feasibility of combined optical coherence tomography and autofluorescence imaging for visualization of needle biopsy placement Characterization of microvascular tortuosity in retinal vein occlusion utilizing optical coherence tomography angiography Evaluation of retinochoroidal tissues in third trimester pregnants: An optical coherence tomography angiography study Evaluation of retinal and choroidal variations in thyroid-associated ophthalmopathy using optical coherence tomography angiography OCTA Study: Retinal Vascular Changes in COVID19 Patients DIABETIC MACULAR ISCHEMIA: Correlation of Retinal Vasculature Changes by Optical Coherence Tomography Angiography and Functional Deficit OCT Risk Factors for 3-Year Development of Macular Complications in eyes with “Resolved” Chronic Central Serous Chorioretinopathy