1. Articles from Makoto Watanabe

    1-8 of 8
    1. Usefulness of longitudinal reconstructed optical coherence tomography images for predicting the need for the reverse wire technique during coronary bifurcation interventions

      Usefulness of longitudinal reconstructed optical coherence tomography images for predicting the need for the reverse wire technique during coronary bifurcation interventions

      Objectives The aim is to investigate the usefulness of longitudinal reconstructed optical coherence tomography (OCT) images in selecting the reverse wire (RW) technique for inserting a guidewire into a side branch (SB). Background It is sometimes necessary to protect the SB with a guidewire to prevent SB complications in PCI for bifurcation lesions. The RW is a novel method for guidewire insertion into an extremely angulated SB when the standard antegrade wire (AW) approach is difficult. Methods This retrospective study included 46 consecutive patients who underwent OCT‐guided PCI in bifurcation lesions with significant SB stenosis. Patients were divided into ...

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    2. Plaque modification of severely calcified coronary lesions by scoring balloon angioplasty using Lacrosse non-slip element: insights from an optical coherence tomography evaluation

      Plaque modification of severely calcified coronary lesions by scoring balloon angioplasty using Lacrosse non-slip element: insights from an optical coherence tomography evaluation

      Percutaneous coronary intervention (PCI) for heavily calcified lesions is challenging because these lesions are resistant to balloon dilatation and stenting. Lacrosse non-slip element (NSE) may have the potential to dilate heavily calcified lesions. We aimed to investigate predictors of successful lesion modification using Lacrosse NSE angioplasty via optical coherence tomography (OCT)-guided PCI. We investigated 32 patients with severe target lesion calcification treated with OCT-guided PCI. Successful lesion modification was defined as the complete fracture of calcification after Lacrosse NSE angioplasty. Before PCI, 172 segments with calcification were identified. After pre-dilatation using Lacrosse NSE, successful lesion modification was achieved in ...

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    3. Impact of branching angle on neointimal coverage of drug-eluting stents implanted in bifurcation lesions

      Impact of branching angle on neointimal coverage of drug-eluting stents implanted in bifurcation lesions

      Objectives: To investigate the impact of branching angle (BA) on neointimal coverage of drug-eluting stents (DESs) in bifurcation lesions. Background: Previous experimental studies indicated that BA influences the local flow turbulence and wall shear stress, which are associated with neointimal coverage of DESs. Methods: Fifty-five bifurcation lesions in 47 patients were evaluated by serial optical coherence tomography (OCT) before DES implantation and at follow-up. Neointimal coverage was assessed in cross-sectional OCT images containing the side branch; regions including the side branch ostium (SO) and vessel wall (VW) were assessed separately. BA was measured using angiography (Angio-BA) and longitudinal OCT imaging ...

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    4. Thin-cap fibroatheroma and large calcification at the proximal stent edge correlate with a high proportion of uncovered stent struts in the chronic phase

      Thin-cap fibroatheroma and large calcification at the proximal stent edge correlate with a high proportion of uncovered stent struts in the chronic phase

      Objective: A high proportion of uncovered stent struts is associated with late stent thrombosis after drug-eluting stent (DES) implantation, which frequently results in myocardial infarction or death. However, the predictors of uncovered stent struts remain unknown. Here, using optical coherence tomography (OCT), we studied the baseline tissue characteristics of the target coronary segment and evaluated their influence on the neointimal coverage of the strut in the chronic phase. Methods: We analyzed 118 coronary lesions treated with OCT-guided DES implantation. OCT examinations of target lesions were performed before and after DES implantation, and tissue characteristics were evaluated within 5 mm outer ...

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    5. Colocalization of thin-cap fibroatheroma and spotty calcification is a powerful predictor of procedure-related myocardial injury after elective coronary stent implantation

      Colocalization of thin-cap fibroatheroma and spotty calcification is a powerful predictor of procedure-related myocardial injury after elective coronary stent implantation

      Objectives Percutaneous coronary intervention (PCI)-related cardiac enzyme elevation is an independent risk factor for adverse clinical outcomes, but preprocedural predictors of this complication have not been established. This study evaluated the morphological characteristics of culprit lesions by frequency-domain optical coherence tomography (FD-OCT), and examined their predictive value for procedure-related myocardial injury in patients undergoing elective PCI. Methods Sixty-eight patients treated by FD-OCT-guided elective PCI were studied. On the basis of the presence or absence of postprocedural plasma cardiac troponin T (cTnT) elevation, patients were divided into elevation (cTnT-E, n =25) and nonelevation (cTnT-nonE, n =43) groups. FD-OCT examinations of ...

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    6. Side branch complication after a single-stent crossover technique: prediction with frequency domain optical coherence tomography

      Side branch complication after a single-stent crossover technique: prediction with frequency domain optical coherence tomography

      Objectives: To identify preprocedural predictors of side branch (SB) complications after coronary bifurcation stent implantation using frequency domain optical coherence tomography (FD-OCT). Background: Coronary bifurcation lesions are common but difficult to treat. Longitudinal reconstruction images of FD-OCT have high image quality and less motion artifacts. Methods: Among 49 patients (age: 69.9 years) who underwent elective coronary stenting, 52 bifurcation lesions without baseline SB stenosis were studied. SB complication was defined as angiographic worsening of SB stenosis (>75%). On the basis of preprocedural FD-OCT imaging, plaque distribution, SB angle, carina tip angle (CT angle), and length between proximal branching point ...

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    1-8 of 8
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  2. Topics in the News

    1. (8 articles) Tsunenari Soeda
    2. (8 articles) Yoshihiko Saito
    3. (7 articles) Nara Medical University
    4. (6 articles) Hiroyuki Okura
    5. (4 articles) Shiro Uemura
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    Side branch complication after a single-stent crossover technique: prediction with frequency domain optical coherence tomography Colocalization of thin-cap fibroatheroma and spotty calcification is a powerful predictor of procedure-related myocardial injury after elective coronary stent implantation Multifocal coronary thrombosis on nondisrupted plaque: observation with optical coherence tomography Thin-cap fibroatheroma and large calcification at the proximal stent edge correlate with a high proportion of uncovered stent struts in the chronic phase Impact of branching angle on neointimal coverage of drug-eluting stents implanted in bifurcation lesions Progression of a Calcified Nodule Causing Acute Myocardial Infarction in a Patient on Hemodialysis ― Serial Optical Coherence Tomography ― Plaque modification of severely calcified coronary lesions by scoring balloon angioplasty using Lacrosse non-slip element: insights from an optical coherence tomography evaluation Usefulness of longitudinal reconstructed optical coherence tomography images for predicting the need for the reverse wire technique during coronary bifurcation interventions Optical coherence tomography features of neovascularization in proliferative diabetic retinopathy: a systematic review Retinal microvascular metrics in untreated essential hypertensives using optical coherence tomography angiography Optical coherence tomography angiography findings of fellow eye of proliferative macular telangiectasia type 2: Long term study Reorganization of the perifoveal microvasculature after macular hole closure assessed via optical coherence tomography angiography