1. Masanori Yamamoto

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    1. Mentioned In 21 Articles

    2. Soluble lectin-like oxidized LDL receptor-1 (sLOX-1) as a valuable diagnostic marker for rupture of thin-cap fibroatheroma: Verification by optical coherence tomography

      Soluble lectin-like oxidized LDL receptor-1 (sLOX-1) as a valuable diagnostic marker for rupture of thin-cap fibroatheroma: Verification by optical coherence tomography
      ... + Division of Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Kobe Gakuin University, Kobe, Japan , * Masanori Yamamoto Affiliations + Cardiovascular Center, Chiba-Hokusoh Hospital, Nippon Medical School, Chiba, ...
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    3. Identification of high-risk plaques associated with peri-procedural myocardial injury following elective percutaneous coronary intervention: Assessment by high-sensitivity troponin-T measurements and optical coherence tomography

      Identification of high-risk plaques associated with peri-procedural myocardial injury following elective percutaneous coronary intervention: Assessment by high-sensitivity troponin-T measurements and optical coherence tomography
      ...nary intervention: Assessment by high-sensitivity troponin-T measurements and optical coherence tomography☆ * Masanori Yamamoto Affiliations + Department of Cardiology, Nippon Medical School Chiba-Hokusoh Hospital, Chiba...
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    4. Six-month follow-up evaluation for everolimus-eluting stents by intracoronary optical coherence tomography: Comparison with paclitaxel-eluting stents

      Six-month follow-up evaluation for everolimus-eluting stents by intracoronary optical coherence tomography: Comparison with paclitaxel-eluting stents
      Background Although several clinical trials have shown the superior efficacy and safety of second-generation everolimus-eluting stents (EES) in comparison with first-generation paclitaxel-eluting stents (PES), the differences in the vascular healing process between EES and PES in a human coronary artery during an early stage are unknown. Methods A prospective optical coherence tomography (OCT) observation was performed for 25 EES in 21 patients and 27 PES in 21 patients at 6months ...
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    5. Utilization of frequency domain optical coherence tomography and fractional flow reserve to assess intermediate coronary artery stenoses: conciliating anatomic and physiologic information

      Utilization of frequency domain optical coherence tomography and fractional flow reserve to assess intermediate coronary artery stenoses: conciliating anatomic and physiologic information
      Fractional flow reserve (FFR) and intravascular imaging respectively provide hemodynamic and anatomical assessments of angiographic intermediate stenoses. Frequency domain optical coherence tomography (FD-OCT) is a promising high-resolution imaging modality, but its clinical use in determining severity of coronary disease has yet to be determined. There, we set out to determine the role of FD-OCT to complement FFR in the evaluation of intermediate coronary artery stenoses. FD-OCT was planned in 176 ...
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    6. Late Vascular Responses From 2 to 4 Years After Implantation of Sirolimus-Eluting Stents: Serial Observations by Intracoronary Optical Coherence Tomography

      Late Vascular Responses From 2 to 4 Years After Implantation of Sirolimus-Eluting Stents: Serial Observations by Intracoronary Optical Coherence Tomography
      Background—Late vascular responses after implantation of drug-eluting stents may play a key role in steadily increasing occurrence of very late stent thrombosis have not yet been fully investigated in human beings. Methods and Results—Serial optical coherence tomography observations at 2 and 4 years were collected for 17 patients treated with 21 sirolimus-eluting stents. Corresponding 376 cross sections within single-stent segments at intervals of 1 mm were selected for ...
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    7. Optical coherence tomography analysis for restenosis of drug-eluting stents

      Optical coherence tomography analysis for restenosis of drug-eluting stents
      Although drug-eluting stents (DES) dramatically reduce the risk of in-stent restenosis (ISR) in comparison to bare-metal stents (BMS) , DES ISR still remains at 5 to 10% in real-world . According to pathological researches, BMS ISR is mainly composed of proliferating smooth muscle cells (SMC). A recent study showed lower effectiveness of DES for target lesion revascularization (TLR) of DES ISR than that of BMS ISR . Therefore, a hypothesis that tissues constituting ...
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    8. Impact of small thrombus formation in restenotic bare-metal stent lesions associated with acute coronary syndrome: Identification by optical coherence tomography

      Abstract: Background: Although in-stent restenosis (ISR) after bare-metal stent (BMS) implantation is considered to be clinically benign, ISR is often associated with adverse complications, such as acute coronary syndrome (ACS). The frequency, type, and location of thrombi in ISR lesions and their clinical presentation have not yet been precisely validated.Methods: Thirty angiographic ISR lesions occurring within 3 to 8months after stenting were evaluated by optical coherence tomography (OCT). A ...
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    9. Appearance of Lipid-Laden Intima and Neovascularization After Implantation of Bare-Metal Stents: Extended Late-Phase Observation by Intracoronary Optical Coherence Tomography

      ...om peristent to intraintima contributes to atherosclerotic progression of neointima. Masamichi Takano, MD*,*, Masanori Yamamoto, MD, Shigenobu Inami, MD*, Daisuke Murakami, MD, Takayoshi Ohba, MD, Yoshihiko Seino, MD and...
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    10. Advanced Neointimal Growth is Not Associated With a Low Risk of In-Stent Thrombus: Optical Coherence Tomographic Findings After

      Advanced Neointimal Growth is Not Associated With a Low Risk of In-Stent Thrombus: Optical Coherence Tomographic Findings After
      Background: There is a hypothesis that advanced neointimal stent coverage may protect against stent thrombosis. In the present study, differences in neointimal growth and prevalence of in-stent thrombus between paclitaxel- and sirolimus-eluting stent (PES and SES) were evaluated by optical coherence tomography (OCT). Methods and Results: Follow-up angiographic and OCT examinations at approximately 6 months were performed for 40 patients (20 PES, 20 SES). Late loss was measured by quantitative ...
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    11. Optical coherence tomography after new scoring balloon angioplasty for in-stent restenosis and de novo coronary lesions

      The AngioSculpt™ scoring balloon catheter (AngioScore, Inc., Fremont, California) has recently been developed for percutaneous intervention in coronary and peripheral arteries. This device is composed of two major components, a minimally compliant balloon and three nitinol wore. The three wires encapsulate the low-compliant balloon in a spiral configuration. The concept is for the spiral wires to score the lumen surface during balloon expansion. However, the precise mechanisms and efficacy of ...
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    12. Delayed Endothelialization After Polytetrafluoroethylene-Covered Stent Implantation for Coronary Aneurysm

      A polytetrafluoroethylene (PTFE)-covered stent is specially used to treat coronary perforation complicating percutaneous intervention in order to prevent the aneurysm from rupturing, but until now it has not been known if endothelialization occurs inside this type of stent. A patient with a giant aneurysm of the right coronary artery underwent successful implantation of a PTFE-covered stent. Angiography at 9-month follow-up showed focal restenosis at the proximal edge of the ...
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    13. 1-15 of 21 1 2 »
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  2. About Masanori Yamamoto

    Masanori Yamamoto is at the Department of Internal Medicine, Chiba-Hokusoh Hospital, Nippon Medical School, Chiba, Japan