All Articles from Yoshinobu Onuma -Optical Coherence Tomography News

Articles from Yoshinobu Onuma

1-24 of 77 1 2 3 4 »
1. Optical coherence tomography substudy of a prospective multicentre randomised post-market trial to assess the safety and effectiveness of the Firehawk cobalt-chromium coronary stent (rapamycin target-eluting) system for the treatment of atherosclerotic le
  
  Explore eurointervention.org Nov 21 2018 Cardiology
  
  Aims: Durable polymer drug-eluting stents (DP-DES) may contribute to persistent inflammation, delayed endothelial healing and subsequent late DES thrombosis. The aim of this optical coherence tomography (OCT) substudy was to compare healing and neointimal coverage of a novel bioabsorbable polymer sirolimus-eluting stent (Firehawk ® ) (BP-DES) versus the DP-DES (XIENCE) at 90 days in an all-comers patient population. Methods and results: The TARGET All Comers study is a prospective multicentre randomised post-market trial of 1,656 patients randomised 1:1 to Firehawk or XIENCE at 21 centres in 10 European countries. The TARGET OCT substudy enrolled 36 consecutive patients with 52 lesions ...
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  Mentions: Yale University University College London Patrick W. Serruys
2. Multimodality Imaging to Detect Vulnerable Plaque in Coronary Arteries and Its Clinical Application (Book Chapter)
  
  Explore intechopen.com May 19 2018 Cardiology , Textbooks
  
  Postmortem studies have described the association between the thin-cap fibroatheroma (TCFA) and the occurrence of acute coronary syndrome (ACS). Both noninvasive and invasive techniques have been refined and used as a research tool to visualize the plaque at a high risk of disruption. There has been a considerable effort to develop the imaging modalities that offer detailed visualization of coronary pathology and accurately predict the adverse cardiac outcomes. This chapter provides an overview of the current and experimental coronary imaging methods to detect vulnerable plaque and discuss the potential implication of multimodality imaging in clinical practice.
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  Mentions: Patrick W. Serruys Yoshinobu Onuma Erasmus University
3. Quality difference of neointima following the implantation of bioresorbable scaffold and metallic stent in patients with ST elevation myocardial infarction: quantitative assessments by light intensity, light attenuation, and backscatter on optical coheren
  
  Explore eurointervention.org Mar 8 2018 Cardiology
  
  Aims: We aimed to assess possible difference of the neointimal quality after everolimus-eluting bioresorbable scaffold (BVS) implantation in comparison with cobalt chromium everolimus-eluting scaffold (CoCr-EES) by optical frequency domain imaging (OFDI). Methods and results: This study is a post-hoc analysis of TROFI II trial assessing neointimal quality 6-month after the implantation of BVS(N=82) and CoCr-EES(N=87) in STEMI patients. Neointimal light property analysis by OFDI full-automatically computed light attenuation, backscatter and light intensity for superficial and deep neointima. High light attenuation/backscatter and high light intensity are reportedly associated with lipidic change and tissue maturation, respectively. Superficial ...
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  Mentions: Imperial College London Leiden University Academic Medical Center at the University of Amsterdam
4. Coronary calcification as a mechanism of plaque/media shrinkage in vessels treated with bioresorbable vascular scaffold: A multimodality intracoronary imaging study
  
  Explore atherosclerosis-journal.com Nov 28 2017 Cardiology
  
  Background and aims Whether coronary calcification is correlated with plaque/media shrinkage (PS) remains unclear. The aim of this study was to assess the relationship between the calcification process and PS, combining serial optical coherence tomography (OCT) and intravascular ultrasound (IVUS) in vessels treated with bioresorbable vascular scaffolds (BVS). Methods In 15 patients (16 vessels), OCT and IVUS images were matched using anatomic landmarks at post-procedure and five years. PS was defined as relative decrease in plaque/media area >5%. The association between the calcification process and PS was investigated. Mixed effects model was used to assess correlations and changes ...
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  Mentions: Patrick W. Serruys Nico Bruining Yoshinobu Onuma
5. Serial Assessment of Tissue Precursors and Progression of Coronary Calcification Analyzed by Fusion of IVUS and OCT
  
  Explore ScienceDirect Oct 3 2017 Cardiology
  
  Objectives The aim of this study was to assess calcium growth with fused grayscale intravascular ultrasound (IVUS), IVUS–virtual histology, and optical coherence tomography (OCT) from baseline to 5-year follow-up in patients treated with bioresorbable vascular scaffolds. Background IVUS and OCT have individual strengths in assessing plaque composition and volume. Fusion of images obtained using these methods could potentially aid in coronary plaque assessment. Methods Anatomic landmarks and endoluminal radiopaque markers were used to fuse OCT and IVUS images and match baseline and follow-up. Results Seventy-two IVUS–virtual histology and OCT paired matched cross-sectional in- and out-scaffold segments were fused ...
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  Mentions: Imperial College London Leiden University Capital Medical University
6. Effect of Post-Dilatation Following Primary PCI With Everolimus-Eluting Bioresorbable Scaffold Versus Everolimus-Eluting Metallic Stent Implantation: An Angiographic and Optical Coherence Tomography TROFI II Substudy
  
  Explore ScienceDirect Sep 24 2017 Cardiology
  
  Objectives This study sought to investigate the effect of post-dilatation on angiographic and intracoronary imaging parameters in the setting of primary percutaneous coronary intervention comparing the everolimus-eluting bioresorbable scaffold (BRS) with the everolimus-eluting metallic stent (EES). Background Routine post-dilatation of BRS has been suggested to improve post-procedural angiographic and subsequent device-related clinical outcomes. Methods In the ABSORB STEMI TROFI II trial, 191 patients with ST-segment elevation myocardial infarction were randomly assigned to treatment with BRS (n = 95) or EES (n = 96). Minimal lumen area and healing score as assessed by optical coherence tomography at 6 months were compared between BRS- ...
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  Mentions: Academic Medical Center at the University of Amsterdam Patrick W. Serruys Stephan Windecker
7. Tissue characterization with depth-resolved attenuation coefficient and backscatter term in intravascular optical coherence tomography images
  
  Explore SPIE Digital Library Sep 17 2017 Cardiology
  
  An important application of intravascular optical coherence tomography (IVOCT) for atherosclerotic tissue analysis is using it to estimate attenuation and backscatter coefficients. This work aims at exploring the potential of the attenuation coefficient, a proposed backscatter term, and image intensities in distinguishing different atherosclerotic tissue types with a robust implementation of depth-resolved (DR) approach. Therefore, the DR model is introduced to estimate the attenuation coefficient and further extended to estimate the backscatter-related term in IVOCT images, such that values can be estimated per pixel without predefining any delineation for the estimation. In order to exclude noisy regions with a weak ...
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  Mentions: Leiden University Academic Medical Center at the University of Amsterdam Patrick W. Serruys
8. Serial 5-Year Evaluation of Side Branches Jailed by Bioresorbable Vascular Scaffolds Using 3-Dimensional Optical Coherence Tomography
  
  Explore Circulation Sep 17 2017 Cardiology
  
  Background— The long-term fate of Absorb bioresorbable vascular scaffold (Abbott Vascular, Santa Clara, CA) struts jailing side branch ostia has not been clarified. We therefore evaluate serially (post-procedure and at 6 months, 1, 2, 3, and 5 years) the appearance and fate of jailed Absorb bioresorbable vascular scaffold struts. Methods and Results— We performed 3-dimensional optical coherence tomographic analysis of the ABSORB Cohort B trial (A Clinical Evaluation of the Bioabsorbable Everolimus Eluting Coronary Stent System in the Treatment of Patients With De Novo Native Coronary Artery Lesions) up to 5 years using a novel, validated cut-plane analysis method. We ...
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  Mentions: Patrick W. Serruys Stephan Windecker Yoshinobu Onuma
9. Report of an ESC-EAPCI Task Force on the evaluation and use of bioresorbable scaffolds for percutaneous coronary intervention: executive summary
  
  Explore Journals Aug 28 2017 Cardiology
  
  BRS require careful lesion assessment, to determine the need and extent of lesion preparation, as well as to select the appropriate size and length of the device. The use of pre-and post-procedural intracoronary imaging (Intravascular ultrasound, optical coherence tomography), as well as online quantitative coronary angiography, is encouraged to optimize device implantation. The use of BRS in heavily calcified vessels is strongly discouraged. Bioresorbable scaffolds should be avoided in stenoses with reference diameter smaller than 2.5 mm and in ostial lesions.
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  Mentions: Patrick W. Serruys European Society of Cardiology Stephan Windecker
10. Hemodynamic analysis of a novel bioresorbable scaffold in porcine coronary artery model
  
  Explore Wiley Online Library Aug 26 2017 Cardiology
  
  Background The shear stress distribution assessment can provide useful insights for the hemodynamic performance of the implanted stent/scaffold. Our aim was to investigate the effect of a novel bioresorbable scaffold, Mirage on local hemodynamics in animal models. Method The main epicardial coronary arteries of 7 healthy mini-pigs were implanted with 11 Mirage Microfiber sirolimus-eluting Bioresorbable Scaffolds (MMSES). Optical coherence tomography (OCT) was performed post scaffold implantation and the obtained images were fused with angiographic data to reconstruct the coronary artery anatomy. Blood flow simulation was performed and Endothelial Shear Stress(ESS) distribution was estimated for each of the 11 ...
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  Mentions: Patrick W. Serruys Yoshinobu Onuma Erasmus University
11. Imaging outcomes of bioresorbable scaffold overlap: an optical coherence tomography analysis from the ABSORB EXTEND trial
  
  Explore ResearchGate Mar 25 2017 Cardiology
  
  Aims: The purpose of this study was to assess the vascular response and vessel healing of overlapped Absorb scaffolds (Abbott Vascular, Santa Clara, CA, USA) compared to non-overlapped devices in human coronary arteries as assessed by optical coherence tomography (OCT) in the same treated segment. Methods and results: The ABSORB EXTEND (NCT01023789) trial is a prospective, single-arm, openlabel clinical study which enrolled 800 patients. The planned overlap OCT subgroup in the ABSORB EXTEND trial was analysed and two-year OCT follow-up was performed in seven patients. In cross-section level analysis at baseline, lumen and abluminal scaffold areas were larger in overlap ...
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  Mentions: Imperial College London University of Manchester Patrick W. Serruys
12. Is quantitative coronary angiography reliable in assessing the late lumen loss of the everolimus eluting bioresorbable polylactide scaffold in comparison with the cobalt chromium metallic stent?
  
  Explore eurointervention.org Mar 11 2017 Cardiology
  
  Aims: Immediately after stent/scaffold implantation, quantitative coronary angiography (QCA) with respect to optical coherence tomography (OCT) more severely underestimates the lumen diameter (LD) in Absorb than in XIENCE. This OCT-QCA discrepancy has not been evaluated at long-term follow-up. The present study aimed to assess the accuracy of QCA with reference to OCT in Absorb as compared to XIENCE.
  
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  Mentions: Beth Israel Deaconess Medical Center Columbia University Leiden University
13. Fate of post-procedural malapposition of everolimus-eluting polymeric bioresorbable scaffold and everolimus-eluting cobalt chromium metallic stent in human coronary arteries: sequential assessment with optical coherence tomography in ABSORB Japan trial
  
  Explore Journals Feb 7 2017 Cardiology
  
  Aims The natural course of post-procedural incomplete strut apposition (ISA) after the implantation of bioresorbable scaffolds (BVS) remains unknown. The purpose of the present study was to evaluate the fate of post-procedural ISA after everolimus-eluting Absorb BVS in comparison with the second-generation everolimus-eluting cobalt chromium stent (CoCr-EES). Methods and results Fate of post-procedural ISA was evaluated by serial optical coherence tomography (OCT) in the ABSORB Japan randomized trial [OCT-1 subgroup: 110 paired lesions of post-procedure and 2-year follow-up (BVS 73 lesions vs. CoCr-EES 37 lesions)] with respect to ISA distance. Post-procedure ISA struts were categorized into either ‘resolved’ or ‘persistent ...
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  Mentions: Patrick W. Serruys Yoshinobu Onuma Erasmus University
14. Intracoronary optical coherence tomography: Clinical and research applications and intravascular imaging software overview
  
  Explore Wiley Online Library Jan 21 2017 Cardiology
  
  By providing valuable information about the coronary artery wall and lumen, intravascular imaging may aid in optimizing interventional procedure results and thereby could improve clinical outcomes following percutaneous coronary intervention (PCI). Intravascular optical coherence tomography (OCT) is a light-based technology with a tissue penetration of approximately 1 to 3 mm and provides near histological resolution. It has emerged as a technological breakthrough in intravascular imaging with multiple clinical and research applications. OCT provides detailed visualization of the vessel following PCI and provides accurate assessment of post-procedural stent performance including detection of edge dissection, stent struts apposition, tissue prolapse, and healing ...
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  Mentions: Imperial College London Leiden University University College London
15. Accuracy of coronary computed tomography angiography for bioresorbable scaffold luminal investigation: a comparison with optical coherence tomography
  
  Explore Home - Springer Dec 3 2016 Cardiology
  
  To establish the accuracy of coronary computed tomography angiography (CTA) for in-scaffold quantitative evaluation with optical coherence tomography (OCT) as a reference. The translucent backbone of the bioresorbable scaffold allow us to evaluate non-invasively the coronary lumen with coronary CTA. In the ABSORB first-in-man studies, coronary CTA was shown to be feasible for quantitative luminal assessment. Nevertheless, a comparison with an intravascular modality with higher resolution has never been performed. In the ABSORB Cohort B trial, 101 patient with non-complex lesions were treated with the fully biodegradable vascular scaffold. For this analysis, all patients who underwent coronary CTA at 18 ...
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  Mentions: Patrick W. Serruys Yoshinobu Onuma Erasmus University
16. Two-year clinical, angiographic, and serial optical coherence tomographic follow-up after implantation of an everolimus-eluting bioresorbable scaffold and an everolimus-eluting metallic stent: insights from the randomised ABSORB Japan trial
  
  Explore eurointervention.org Sep 14 2016 Cardiology
  
  Aims: We sought to investigate two-year clinical and serial optical coherence tomography (OCT) outcomes after implantation of a fully bioresorbable vascular scaffold (BVS) or a cobalt-chromium everolimus-eluting stent (CoCr-EES). Methods and results: In the ABSORB Japan trial, 400 patients were randomised in a 2:1 ratio to BVS (N=266) or CoCr-EES (N=134). A pre-specified OCT subgroup (N=125, OCT-1 group) underwent angiography and OCT post procedure and at two years. Overall, the two-year TLF rates were 7.3% and 3.8% in the BVS and CoCr-EES arms (p=0.18), respectively. Very late scaffold thrombosis (VLST) beyond one ...
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  Mentions: Gregg W. Stone Patrick W. Serruys Yoshinobu Onuma
17. Evaluation of vascular healing of polymer-free sirolimus-eluting stents in native coronary artery stenosis: a serial follow-up at three and six months with optical coherence tomography imaging
  
  Explore eurointervention.org Aug 9 2016 Cardiology
  
  Aims: Our aim was to assess vascular response after polymer-free sirolimus-eluting stent (SES) implantation by using an optical coherence tomography (OCT)-derived vascular healing score (HS), quantifying the deficiency of healing. Methods and results: In a prospective, multicentre, single-arm, open-label study, OCT examinations were performed at three months in 45 patients (47 lesions). Per protocol, 24 lesions which had not reached adequate vascular healing according to study criteria were scheduled for OCT examination at six months. The HS was calculated at two time points. Serial OCT imaging demonstrated that the proportion of covered stent struts increased from a median of ...
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  Mentions: Patrick W. Serruys Hector M. Garcia-Garcia Yoshinobu Onuma
18. Bioresorption and Vessel Wall Integration of a Fully Bioresorbable Polymeric Everolimus-Eluting Scaffold Optical Coherence Tomography, Intravascular Ultrasound, and Histological Study in a Porcine Model With 4-Year Follow-Up
  
  Explore interventions.onlinejacc.org Apr 22 2016 Cardiology
  
  Objectives The aim of the present study was to investigate the relationship between the integration process and luminal enlargement with the support of light intensity (LI) analysis on optical coherence tomography (OCT), echogenicity analysis on intravascular ultrasound, and histology up to 4 years in a porcine model. Background In pre-clinical and clinical studies, late luminal enlargement has been demonstrated at long-term follow-up after everolimus-eluting poly-l-lactic acid coronary scaffold implantation. However, the time relationship and the mechanistic association with the integration process are still unclear. Methods Seventy-three nonatherosclerotic swine that received 112 Absorb scaffolds were evaluated in vivo by OCT, intravascular ...
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  Mentions: Imperial College London Leiden University Academic Medical Center at the University of Amsterdam
19. Edge Vascular Response After Resorption of the Everolimus-Eluting Bioresorbable Vascular Scaffold　– A 5-Year Serial Optical Coherence Tomography Study –
  
  Explore jstage.jst.go.jp Mar 7 2016 Cardiology
  
  Background: The edge vascular response (EVR) has been linked to important prognostic implications in patients treated with permanent metallic stents. We aimed to investigate the relationship of EVR with the geometric changes in the everolimus-eluting bioresorbable scaffold using serial optical coherence tomography (OCT) analysis. Methods and Results: In the first-in-man ABSORB trial, 28 patients (29 lesions) underwent serial OCT at 4 different time points (Cohort B1: post-procedure, 6, 24, and 60 months [n=13]; Cohort B2: post-procedure, 12, 36, and 60 months [n=15]) following implantation of the scaffold. In Cohort B1, there was no significant luminal change at the ...
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  Mentions: Imperial College London Patrick W. Serruys Yoshinobu Onuma
20. Quantitative assessment of the stent/scaffold strut embedment analysis by optical coherence tomography
  
  Explore Home - Springer Feb 23 2016 Cardiology
  
  The degree of stent/scaffold embedment could be a surrogate parameter of the vessel wall-stent/scaffold interaction and could have biological implications in the vascular response. We have developed a new specific software for the quantitative evaluation of embedment of struts by optical coherence tomography (OCT). In the present study, we described the algorithm of the embedment analysis and its reproducibility. The degree of embedment was evaluated as the ratio of the embedded part versus the whole strut height and subdivided into quartiles. The agreement and the inter- and intra-observer reproducibility were evaluated using the kappa and the interclass correlation ...
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  Mentions: Imperial College London Leiden University Patrick W. Serruys
21. Progression of calcification after implantation of a fully bioresorbable scaffold: A serial and combined IVUS-OCT follow-up of 5 years
  
  Explore International Journal of Cardiology Jan 28 2016 Cardiology
  
  A 72-year-old female enrolled in the ABSORB Cohort B2 trial underwent successful percutaneous coronary intervention of the proximal left anterior descending artery with a 3 × 18 mm Absorb everolimus-eluting Bioresorbable scaffold (Absorb BVS, Abbott Vascular, CA). Optical coherence tomography (OCT) and intravascular ultrasound (IVUS) images after the procedure showed optimal scaffold expansion without any mechanical complication (Fig. 1: Post-A, C). As protocol mandated, follow-up invasive coronary imagings (angiography, OCT, IVUS) were scheduled at 1-, 3- and 5-year, respectively.
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  Mentions: Patrick W. Serruys Yoshinobu Onuma Erasmus University
22. Bioresorbable vascular scaffold treatment induces the formation of neointimal cap that seals the underlying plaque without compromising the luminal dimensions: a concept based on serial optical coherence tomography data
  
  Explore eurointervention.org Dec 3 2015 Cardiology
  
  Aims: To evaluate the implications of an Absorb bioresorbable vascular scaffold (Absorb BVS) on the morphology of the superficial plaques. Methods and results: Forty-six patients who underwent Absorb BVS implantation and 20 patients implanted with bare metal stents (BMS) who had serial optical coherence tomographic examination at baseline and follow-up were included in this analysis. The thin-capped fibroatheromas (TCFA) were identified in the device implantation regions and in the adjacent native coronary segments. Within all regions, circumferential locations of TCFA and calcific tissues were identified, and the neointimal thickness was measured at follow-up. At six to 12-month follow-up, only 8 ...
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  Mentions: Patrick W. Serruys Hector M. Garcia-Garcia Stephan Windecker
23. Incidence and potential mechanism of resolved, persistent and newly acquired malapposition three days after implantation of self-expanding or balloon-expandable stents in a STEMI population: insights from optical coherence tomography in the APPOSITION II
  
  Explore eurointervention.org Nov 10 2015 Cardiology
  
  Aims: The aim of the current study was to investigate the frequency and mechanisms of sequential incomplete stent apposition (ISA) changes such as persistent, resolved or newly acquired ISA during the first three days after primary PCI (pPCI) in a matched segment-level analysis, with the comparison between self-expanding and balloon-expandable stents assessed by optical coherence tomography (OCT). Methods and results: The current analysis is a substudy of the APPOSITION II study that included 69 patients (self-expanding: 35, balloon-expandable: 34) using serial optical coherence tomography (OCT) post procedure and three days after pPCI. In order to evaluate a temporal change in ...
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  Mentions: Imperial College London Corrado Tamburino University of Catania
24. Comparative analysis method of permanent metallic stents (XIENCE) and bioresorbable poly-L-lactic (PLLA) scaffolds (Absorb) on optical coherence tomography at baseline and follow-up
  
  Explore eurointervention.org Oct 9 2015 Cardiology
  
  Aims: Fully bioresorbable Absorb poly-L-lactic-acid (PLLA) scaffolds (Abbott Vascular, Santa Clara, CA, USA) are a novel approach for the treatment of coronary narrowing. Due to the translucency of the material (PLLA), the optical coherence tomography (OCT) measurement methods used in the ABSORB trials were unique but not applicable for permanent metallic stents. When the Absorb scaffold and metallic stents are compared in the context of randomised trials, it is challenging to compare the two devices using the conventional methods. The primary purpose of this report is to explain the biases in conventional methodologies applied for metallic stents and for PLLA ...
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  Mentions: Imperial College London Case Western Reserve University Leiden University
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