1. Articles from Amane Kozuki

    1-15 of 15
    1. Early and mid-term vascular responses to optical coherence tomography guided everolimus-eluting stent implantation in stable coronary artery disease

      Early and mid-term vascular responses to optical coherence tomography guided everolimus-eluting stent implantation in stable coronary artery disease

      Background Analysis of pooled clinical data has shown the safety of 3 months of dual antiplatelet therapy (DAPT) with everolimus-eluting cobalt–chromium stents (Co-Cr EESs). This study evaluated early and mid-term vascular responses to Co-Cr EESs in patients with stable coronary artery disease (CAD). Methods The MECHANISM-Elective trial (NCT02014818) is a multicenter optical coherence tomography (OCT) registry. Enrolled patients were evaluated by OCT immediately after EES implantation (post), were prospectively allocated to either 1 month (n = 50) or 3 months (n = 50) OCT follow-up, and then received a 12 months OCT evaluation. The incidences of intrastent thrombus (IS-Th) and irregular ...

      Read Full Article
    2. Data on two- and three-dimensional optical coherence tomography guidance for the treatment for the bifurcation lesion

      Data on two- and three-dimensional optical coherence tomography guidance for the treatment for the bifurcation lesion

      This article comprised the data related to the research article entitled “Feasibility and usefulness of three-dimensional optical coherence tomography guidance for optimal side branch treatment in coronary bifurcation stenting” (Nagoshi et al., In press) [1] . In this article we reports details about two patterns of guide wire (GW) recrossing position after crossover stenting in bifurcation lesion classified with three-dimensional optical coherence tomography (3D-OCT) (Okamura et al., 2014) [2] and follow-up data about the treatment with percutaneous coronary intervention(PCI) for bifurcation lesion in terms of the two- (2D) or 3D-OCT guidance. Subgroup analysis about differences in the parameters between the ...

      Read Full Article
    3. Feasibility and usefulness of three-dimensional optical coherence tomography guidance for optimal side branch treatment in coronary bifurcation stenting

      Feasibility and usefulness of three-dimensional optical coherence tomography guidance for optimal side branch treatment in coronary bifurcation stenting

      Background For the treatment of coronary bifurcation lesions, optimal guidewire (GW) recrossing after main vessel stenting is important for good stent apposition at the side branch (SB) orifice in kissing balloon inflation (KBI). Methods We analyzed 150 bifurcation lesions treated with single stenting following KBI in the three-dimensional optical coherence tomography (3D-OCT) bifurcation registry study (2015–16) and a single center experience (2012–16). OCT examination was performed after GW recrossing to the SB and after KBI. Patients were divided into two-dimensional (2D, n = 78) and 3D groups ( n = 72) according to 2D- or 3D-OCT guidance. GW recrossing position, jailing ...

      Read Full Article
    4. Optical coherence tomography study of chronic-phase vessel healing after implantation of bare metal and paclitaxel-eluting self-expanding nitinol stents in the superficial femoral artery

      Optical coherence tomography study of chronic-phase vessel healing after implantation of bare metal and paclitaxel-eluting self-expanding nitinol stents in the superficial femoral artery

      Background This study aimed to assess chronic-phase suppression of neointimal proliferation and arterial healing following paclitaxel-coated (PTX) and bare metal stent (BMS) implantation in the superficial femoral artery using optical coherence tomography (OCT). Methods Twenty-five patients with 68 stents underwent an 8-month OCT follow-up. Besides standard OCT variables, neointimal characterization and frequencies of peri-strut low-intensity area (PLIA), macrophage accumulation, and in-stent thrombi were evaluated. Results The mean neointimal thickness was significantly less with PTX stents (544.9 ± 202.2 μm vs. 865.0 ± 230.6 μm, p < 0.0001). The covered and uncovered strut frequencies were significantly smaller and larger ...

      Read Full Article
    5. Stabilizing effect of combined eicosapentaenoic acid and statin therapy on coronary thin-cap fibroatheroma

      Stabilizing effect of combined eicosapentaenoic acid and statin therapy on coronary thin-cap fibroatheroma

      Background The addition of highly purified eicosapentaenoic acid (EPA) to statin therapy prevents cardiovascular events. However, the impact of this treatment on vulnerable plaques remains unclear. The aim of this study was to assess the impact of adding EPA to a standard statin therapy on vulnerable plaques by serial optical coherence tomography (OCT). Methods Forty-nine non-culprit thin-cap fibroatheroma (TCFA) lesions in 30 patients with untreated dyslipidemia were included. Patients were randomly assigned to EPA (1800 mg/day) + statin (23 TCFA, 15 patients) or statin only (26 TCFA, 15 patients) treatment. The statin (rosuvastatin) dose was adjusted to achieve a target ...

      Read Full Article
    6. Analysis of Long-term Arterial Healing Following Implantation of Different Types of Stents by Optical Coherence Tomography

      Analysis of Long-term Arterial Healing Following Implantation of Different Types of Stents by Optical Coherence Tomography

      Background Although drug-eluting stents have significantly reduced the mid-term incidence of target lesion revascularization, however, in vivo studies on long-term vessel healing of sirolimus-eluting and paclitaxel-eluting stents (SES and PES) are limited. So the aim of this study was to compare long-term arterial healing in SES and PES. Methods We evaluated 27 SES (23 patients) and 21 PES (20 patients) by serial optical coherence tomography (OCT) at 6 months (mid-phase) and ≥3 years (late-phase) after stenting and evaluated the change of neointimal thickness (NIT), the percentages of uncovered and malapposed struts, peri-strut low intensity area (region around stent struts homogenously ...

      Read Full Article
    7. Natural consequence of post-intervention stent malapposition, thrombus, tissue prolapse, and dissection assessed by optical coherence tomography at mid-term follow-up

      Natural consequence of post-intervention stent malapposition, thrombus, tissue prolapse, and dissection assessed by optical coherence tomography at mid-term follow-up

      Aims We performed this study to clarify natural consequences of abnormal structures (stent malapposition, thrombus, tissue prolapse, and stent edge dissection) after percutaneous coronary intervention (PCI). Methods and results Thirty-five patients treated with 40 drug-eluting stents underwent serial optical coherence tomography (OCT) imaging immediately after PCI and at the 8-month follow-up. Among a total of 73 929 struts in every frame, 431 struts (26 stents) showed malapposition immediately after PCI. Among these, 49 remained malapposed at the follow-up examination. The mean distance between the strut and vessel wall (S–V distance) of persistent malapposed struts on post-stenting OCT images was ...

      Read Full Article
    8. Qualitative and Quantitative Assessment of Stent Restenosis by Optical Coherence Tomography

      Qualitative and Quantitative Assessment of Stent Restenosis by Optical Coherence Tomography

      We hypothesized that the tissue components of in-stent restenosis (ISR) might differ between drug-eluting stents (DES) and bare-metal stents (BMS) and that these differences could be distinguished by qualitative and quantitative optical coherence tomography (OCT) analyses. Methods and Results:  One-hundred and twenty-two initial ISR lesions (sirolimus-eluting stents: n=28; paclitaxel-eluting stents: n=51; BMS: n=43) were evaluated with OCT. Based on their OCT appearance, the lesions were classified as homogeneous, layered or heterogeneous. The optical properties of backscatter, attenuation and signal intensity of the neointimal tissue (NIT) were quantified. To evaluate the vascular response after balloon angioplasty (BA), the ...

      Read Full Article
    9. Effect of Cytochrome P450 2C19 Polymorphism on Target Lesion Outcome After Drug-Eluting Stent Implantation in Japanese Patients Receiving Clopidogrel

      Effect of Cytochrome P450 2C19 Polymorphism on Target Lesion Outcome After Drug-Eluting Stent Implantation in Japanese Patients Receiving Clopidogrel

      Background: Cytochrome P450 (CYP) 2C19 polymorphism is associated with reduced responsiveness to clopidogrel and poor clinical outcome after drug-eluting stent (DES) implantation, but its contribution to lesion outcome after DES implantation is unclear. Methods and Results: The study included 160 Japanese patients who received clopidogrel and underwent DES implantation with follow-up angiography. Patients were divided into 3 groups by CYP2C19 polymorphism: extensive metabolizers (EM), intermediate metabolizers (IM), and poor metabolizers (PM). The incidence of major adverse cardiac events (MACE) and target lesion revascularization (TLR) were compared among the 3 groups. Optical coherence tomography (OCT) was performed for 120 patients to ...

      Read Full Article
    10. Optical coherence evaluation for everolimus-eluting stents at 8 months after implantation

      Optical coherence evaluation for everolimus-eluting stents at 8 months after implantation
      Objective The aim of this study was to evaluate detailed vessel response after everolimus-eluting stents (EES) implantation in human de novo coronary lesions by optical coherence tomography (OCT). Design, setting and patients Between November 2008 and October 2009, 25 patients (14 men, 65.5±8.6 years) with de novo native coronary artery lesions were implanted with 30 EES, and OCT was performed at 8 months post-implantation. Main Outcome Measures Neointimal thickness (NIT) on each strut, strut apposition to the vessel wall, the frequency of struts surrounded by low intensity area and the incidence of intra-stent thrombus were analysed. To ...
      Read Full Article
    11. The Ability of Optical Coherence Tomography to Monitor Percutaneous Coronary Intervention: Detailed Comparison with Intravascular Ultrasound

      The Ability of Optical Coherence Tomography to Monitor Percutaneous Coronary Intervention: Detailed Comparison with Intravascular Ultrasound
      ABSTRACT: Background. We investigated the usefulness of optical coherence tomography (OCT) to evaluate vessel response after stent implantation by comparing with that of intravascular ultrasound (IVUS). Methods and Results. Eighteen cases undergoing percutaneous coronary intervention (PCI) who provided consent for both IVUS and OCT usage pre- and post-PCI procedure were enrolled. The lumen area at the distal site of the culprit lesion was smaller on OCT images than on IVUS images due to proximal vessel occlusion, whereas the lumen area at the proximal site of the lesion did not differ between OCT and IVUS images (distal site: 4.6 ± 2 ...
      Read Full Article
    12. Comparison by Optical Coherence Tomography of Paclitaxel-Eluting Stents With Sirolimus-Eluting Stents Implanted in One Coronary Artery in One Procedure: 6-Month Follow-up

      Comparison by Optical Coherence Tomography of Paclitaxel-Eluting Stents With Sirolimus-Eluting Stents Implanted in One Coronary Artery in One Procedure: 6-Month Follow-up
      Differences between paclitaxel-eluting stents (PES) and sirolimus-eluting stent (SES) in neointimal proliferation under strictly matched conditions remain to be clarified by optical coherence tomography (OCT). Methods and Results: Between May and December 2007, 27 patients were implanted with a PES and a SES, randomized to either the proximal or distal site in a single coronary artery, and underwent follow-up angiography and OCT examination at 6 months. The frequency of vessel wall apposition with neointima was greater for PES than for SES (92.6% vs 85.8%, P<0.01). The median (25th, 75th percentiles) neointimal thickness (NIT) in PES was ...
      Read Full Article
    13. Factors That Influence Measurements and Accurate Evaluation of Stent Apposition by Optical Coherence Tomography

      Factors That Influence Measurements and Accurate Evaluation of Stent Apposition by Optical Coherence Tomography
      kground: Factors influencing measurements and accurate evaluation of stent apposition by optical coherence tomography (OCT) are not established. Methods and Results: Phantom models of known luminal sizes and lengths were evaluated by OCT under various conditions and measurements were compared with actual values. Stents implanted into phantom models were examined by OCT to validate the measurement point on the stent strut surface for accurate evaluation of stent apposition. Strut thickness was measured at 3 points (midpoint, inner and outer surfaces of the stent shadow). The precision of OCT measurements of lumen diameter and area was satisfactory when the image wire ...
      Read Full Article
    14. Low plasma adiponectin levels are associated with presence of thin-cap fibroatheroma in men with stable coronary artery disease

      Abstract: Background: Previous studies demonstrated the inverse association of adiponectin with coronary artery disease (CAD) especially in men with acute coronary syndrome, however their association with in vivo plaque vulnerability in stable CAD, which may be reflected by the thin-cap fibroatheroma (TCFA) prevalence, remains unknown.Methods: In 50 men with stable CAD, we identified TCFA with multi-vessel examination of combined use of virtual histology intravascular ultrasound (VH-IVUS) and optical coherence tomography (OCT). The definition of TCFA was described as follows; necrotic-core rich lesion (% necrotic-core >10%) without evidence of an overlying fibrous component and % plaque-volume >40% in at least 3 consecutive ...
      Read Full Article
    1-15 of 15
  1. Categories

    1. Applications:

      Art, Cardiology, Dentistry, Dermatology, Developmental Biology, Gastroenterology, Gynecology, Microscopy, NDE/NDT, Neurology, Oncology, Ophthalmology, Other Non-Medical, Otolaryngology, Pulmonology, Urology
    2. Business News:

      Acquisition, Clinical Trials, Funding, Other Business News, Partnership, Patents
    3. Technology:

      Broadband Sources, Probes, Tunable Sources
    4. Miscellaneous:

      Jobs & Studentships, Student Theses, Textbooks
  2. Topics in the News

    1. (15 articles) Kobe University Graduate School of Medicine
    2. (15 articles) Toshiro Shinke
    3. (14 articles) Junya Shite
    4. (12 articles) Hiromasa Otake
    5. (12 articles) Ken-ichi Hirata
    6. (8 articles) Hiroyuki Kawamori
    7. (5 articles) St. Jude Medical
    8. (4 articles) Lightlab M3 Imaging Console
    9. (3 articles) Takayuki Okamura
    10. (1 articles) Volcano Corporation
  3. Popular Articles

  4. Picture Gallery

    Factors That Influence Measurements and Accurate Evaluation of Stent Apposition by Optical Coherence Tomography Comparison by Optical Coherence Tomography of Paclitaxel-Eluting Stents With Sirolimus-Eluting Stents Implanted in One Coronary Artery in One Procedure: 6-Month Follow-up The Ability of Optical Coherence Tomography to Monitor Percutaneous Coronary Intervention: Detailed Comparison with Intravascular Ultrasound Optical coherence evaluation for everolimus-eluting stents at 8 months after implantation Natural Consequence of Stent Malaposition Assessed by Optical Coherence Tomography Effect of Cytochrome P450 2C19 Polymorphism on Target Lesion Outcome After Drug-Eluting Stent Implantation in Japanese Patients Receiving Clopidogrel Qualitative and Quantitative Assessment of Stent Restenosis by Optical Coherence Tomography Natural consequence of post-intervention stent malapposition, thrombus, tissue prolapse, and dissection assessed by optical coherence tomography at mid-term follow-up Analysis of Long-term Arterial Healing Following Implantation of Different Types of Stents by Optical Coherence Tomography Structure–Function Correlation Using OCT Angiography And Microperimetry In Diabetic Retinopathy Response to Re: Evaluation of choroidal changes in adolescent idiopathic scoliosis using enhanced depth imaging optical coherence tomography OCT Image-Guided Treatment of Scars (Book Chapter)