1. Articles from Fumiaki Nakao

    1-11 of 11
    1. Efficacy of the proximal optimization technique on crossover stenting in coronary bifurcation lesions in the 3D-OCT bifurcation registry

      Efficacy of the proximal optimization technique on crossover stenting in coronary bifurcation lesions in the 3D-OCT bifurcation registry

      Aim We sought to investigate the efficacy of the proximal optimization technique (POT) on crossover stenting followed by side branch (SB) dilation under optical coherence tomography guidance in a multicenter registry study. Methods and results A total of 135 bifurcation lesions in 134 patients were divided into POT (n = 52) and non-POT groups (n = 83). The POT was performed before SB dilatation (pre-POT; n = 26), finally (final-POT; n = 12), at both timing (re-POT; n = 13), and uncertain (n = 1). There were no significant intergroup differences in the success rate of guide wire re-crossing (GWR) into the optimal cell (72% vs ...

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    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 ...

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    3. Impact of Guidewire Recrossing Point into Stent Jailed Side Branch for Optimal Kissing Balloon Dilatation - Corelab 3D Optical Coherence Tomography Analysis

      Impact of Guidewire Recrossing Point into Stent Jailed Side Branch for Optimal Kissing Balloon Dilatation - Corelab 3D Optical Coherence Tomography Analysis

      AIMS: We investigated the influence of the guidewire recrossing point on the incidence of incomplete stent apposition (ISA) after kissing balloon dilatation (KBD), and clinical and angiographic outcome at 9 months in a prospective multicenter registry. METHODS AND RESULTS: One hundred five patients underwent single crossover stenting across the side branch (SB) and subsequent KBD. Jailing configuration of the SB orifice and the guidewire recrossing position were assessed by off-line 3D-OCT in the corelab. We defined the cases that achieved both Link-Free carina configuration and the distal recrossing as the LFD group (54 cases), and the other cases were defined ...

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    4. 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 ...

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    5. Three-dimensional optical coherence tomography with the current version (E.4 [Build 10457]) of Metallic Stent Optimization Software is a mirror image

      Three-dimensional optical coherence tomography with the current version (E.4 [Build 10457]) of Metallic Stent Optimization Software is a mirror image

      Interventional cardiologists can use 3-dimensional optical coherence tomography (3D-OCT) to intraprocedurally check a recrossed cell on a jailed side branch ostium (SBO) [1]. Although 3D-OCT on the console was useful, 3D-OCT with the current version (E.4 [Build 10457]) of Metallic Stent Optimization Software (St. Jude Medical, Minneapolis, MN, USA) a mirror image was presented. The struts of the Ultimaster (Terumo, Tokyo, Japan) had alternating 3- and 5-side parts between links. The photograph of the outside view of the Ultimaster, that was deployed on the phantom vessel and kissing balloon inflation was performed, this indicated that the 3-side part of ...

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    6. Instant Stent-Accentuated Three-Dimensional Optical Coherence Tomography Guided Selection of Proper Distal Cell for Side Branch Dilatation in Bifurcation Stenting

      Instant Stent-Accentuated Three-Dimensional Optical Coherence Tomography Guided Selection of Proper Distal Cell for Side Branch Dilatation in Bifurcation Stenting

      In the bifurcation stenting, the distal rewiring for the side branch postdilatation confirmed by two-dimensional modalities may not lead to favorable results in some cases. If there are two distal cells divided by the link bridging from the carina, the rewiring through the larger distal cell may be recommended for the side branch postdilatation. Detailed confirmation of the rewired cell by the intraprocedural instant stent-accentuated three-dimensional optical coherence tomography is important.

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    7. Instant stent-accentuated three-dimensional optical coherence tomography of a true bifurcation lesion treated with culotte stenting

      Instant stent-accentuated three-dimensional optical coherence tomography of a true bifurcation lesion treated with culotte stenting

      A 65-year-old woman was performed percutaneous coronary intervention for a bifurcation lesion of the left anterior descending artery (LAD) and the first diagonal branch (Dg). After pre-dilatation, the proximal LAD-Dg was stented with the platinum-chromium elevolimus-eluting stent (PtCrEES). After rewiring to LAD, the instant stent-accentuated 3-dimensional optical coherence tomography (iSA3D-OCT) was reconstructed from 2-dimensional OCT (2D-OCT) by ImageJ with self-made macro-program. Classification of overhanging struts in front of the side branch (SB) ostium was the connecting to carina type, and the recrossed wire was confirmed to pass through the large distal cell. After kissing balloon dilatation (KBD), the mid-distal LAD ...

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    8. Guide wire shadow assessed by shading index is reduced in sparse spring coil wire in optical coherence tomography

      Guide wire shadow assessed by shading index is reduced in sparse spring coil wire in optical coherence tomography

      One of the major problems of a Fourier-domain optical coherence tomography (FD-OCT) is the guide wire (GW) shadow which disturbs precise coronary assessment. If two or more GWs are used in a bifurcation PCI, the GW shadow becomes larger. In FD-OCT, GWs were usually observed as a crescent shape, but GWs with the sparse spring coil were observed as either round or crescent shape. The measured angle making GW shadow of GW without the sparse spring coil was similar to its theoretical angle (30.4 ± 1.7° vs. 30.1 ± 0.7°, p = 0.21); however, the measured angle of ...

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    9. Novel and quick coronary image analysis by instant stent-accentuated three-dimensional optical coherence tomography system in catheterization laboratory

      Novel and quick coronary image analysis by instant stent-accentuated three-dimensional optical coherence tomography system in catheterization laboratory

      In order to confirm the relation between stent struts and the jailed side branch (SB), the actual wire re-crossing position and the optimal wire re-crossing position during a bifurcation stenting, we developed the instant stent-accentuated three-dimensional optical coherence tomography (iSA 3D-OCT) system based on a novel algorithm. Stent struts in two-dimensional optical coherence tomography (2D-OCT) are represented as high-intensity line segments or spots in low-intensity background. Stent struts disappear and a vessel image is created by the mean filter followed by the minimum filter. A strut image is created by subtracting a vessel image from an original image, and accentuated ...

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    1-11 of 11
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    1. (4 articles) Kobe University Graduate School of Medicine
    2. (4 articles) Takayuki Okamura
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    5. (3 articles) National Institutes of Health
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    Novel and quick coronary image analysis by instant stent-accentuated three-dimensional optical coherence tomography system in catheterization laboratory Guide wire shadow assessed by shading index is reduced in sparse spring coil wire in optical coherence tomography Instant Stent-Accentuated 3-Dimensional Optical Coherence Tomography of a Bifurcation Lesion Treated With Reverse Minimum Overlapping Culotte Stenting Instant stent-accentuated three-dimensional optical coherence tomography of a true bifurcation lesion treated with culotte stenting Instant Stent-Accentuated Three-Dimensional Optical Coherence Tomography Guided Selection of Proper Distal Cell for Side Branch Dilatation in Bifurcation Stenting Instant Stent-Accentuated 3-Dimensional Optical Coherence Tomography of Struts Pulled Up by Pulling Stuck Wire and Folded by Kissing Balloon Dilation Three-dimensional optical coherence tomography with the current version (E.4 [Build 10457]) of Metallic Stent Optimization Software is a mirror image Feasibility and usefulness of three-dimensional optical coherence tomography guidance for optimal side branch treatment in coronary bifurcation stenting Impact of Guidewire Recrossing Point into Stent Jailed Side Branch for Optimal Kissing Balloon Dilatation - Corelab 3D Optical Coherence Tomography Analysis Data on two- and three-dimensional optical coherence tomography guidance for the treatment for the bifurcation lesion Medical treatment of inflammatory punctual stenosis monitored by anterior segment optical coherence tomography Development and Validation of a Deep Learning System for Diagnosing Glaucoma Using Optical Coherence Tomography