Articles that mention Hiram G. Bezerra -Optical Coherence Tomography News

Hiram G. Bezerra

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1. Mentioned In 83 Articles
2. Failure Mechanisms and Neoatherosclerosis Patterns in Very Late Drug-Eluting and Bare-Metal Stent Thrombosis
  
  Explore Circulation Sep 1 2016 Cardiology
  
  Background There are few clinical studies on the pathophysiological mechanisms of very late stent thrombosis (VLST). We report optical coherence tomography findings in patients with VLST and compare the findings between bare-metal stents (BMS) and drug-eluting stents (DES). Methods and Results We conducted a registry of stent thrombosis at 4 North American centers with optical coherence tomography imaging programs SAFE registry (The Study of Late Stent Failure Evaluated by OCT ...
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  Mentions: University of Pittsburgh Case Western Reserve University University of British Columbia
3. Dextran or Saline Can Replace Contrast for Intravascular Optical Coherence Tomography in Lower Extremity Arteries
  
  Explore Journal of Endovascular Therapy Jul 9 2016 Cardiology
  
  Purpose: To examine the hypothesis that alternative flush media could be used for lower extremity optical coherence tomography (OCT) imaging in long lesions that would normally require excessive use of contrast. Methods: The OPTical Imaging Measurement of Intravascular Solution Efficacy (OPTIMISE) trial was a single-center, prospective study ( ClinicalTrials.gov identifier NCT01743872 ) that enrolled 23 patients (mean age 6811 years; 14 men) undergoing endovascular intervention involving the superficial femoral artery. Four ...
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  Mentions: Case Western Reserve University Hiram G. Bezerra
4. Three-dimensional registration of intravascular optical coherence tomography and cryo-image volumes for microscopic-resolution validation
  
  Explore SPIE | Journal Jul 5 2016 Cardiology
  
  Evidence suggests high-resolution, high-contrast, 100 frames / s 100frames/s intravascular optical coherence tomography (IVOCT) can distinguish plaque types, but further validation is needed, especially for automated plaque characterization. We developed experimental and three-dimensional (3-D) registration methods to provide validation of IVOCT pullback volumes using microscopic, color, and fluorescent cryo-image volumes with optional registered cryo-histology. A specialized registration method matched IVOCT pullback images acquired in the catheter reference frame to a ...
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  Mentions: Case Western Reserve University Marco A. Costa Madhusudhana Gargesha
5. Optical coherence tomography assessment ruled out the need for intervention in a 'hazy' angiographic image
  
  Explore Home - Springer May 22 2016 Cardiology
  
  No abstract provided
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  Mentions: Case Western Reserve University Hiram G. Bezerra Guilherme F. Attizzani
6. Optical coherence tomography assessment of in-stent restenosis after percutaneous coronary intervention with two-stent technique in unprotected left main
  
  Explore International Journal of Cardiology May 19 2016 Cardiology
  
  Background Optical coherence tomography (OCT) has contributed to a better understanding of in-stent restenosis (ISR); however, studies evaluating ISR pattern after two-stent technique in unprotected left main (ULM) are lacking. We aim to evaluate the ISR pattern of proximal LAD and LCX after two-stent technique in ULM. Methods We performed OCT in 26 patients with isolated or combined ISR (identified by angiography as 50%) after two stent implantation in the ...
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  Mentions: National Institutes of Health Hiram G. Bezerra Wei Wang
7. Processing to determine optical parameters of atherosclerotic disease from phantom and clinical intravascular optical coherence tomography three-dimensional pullbacks
  
  Explore SPIE | Journal May 15 2016 Cardiology
  
  Analysis of intravascular optical coherence tomography (IVOCT) data has potential for real-time in vivo plaque classification. We developed a processing pipeline on a three-dimensional local region of support for estimation of optical properties of atherosclerotic plaques from coronary artery, IVOCT pullbacks. Using realistic coronary artery disease phantoms, we determined insignificant differences in mean and standard deviation estimates between our pullback analyses and more conventional processing of stationary acquisitions with frame ...
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  Mentions: Andrew M. Rollins Case Western Reserve University Guy Lamouche
8. Angiographic and Intracoronary Manifestations of Coronary Fibromuscular Dysplasia
  
  Explore Circulation Apr 18 2016 Cardiology , Oncology
  
  Background We previously described a strong association between fibromuscular dysplasia (FMD) and spontaneous coronary artery dissection. Angiographic manifestations of coronary FMD aside from dissection were considered rare. However, we observed several coronary FMD angiographic abnormalities with corresponding optical coherence tomography abnormalities. Methods and Results Baseline demographics and imaging of patients with suspected coronary FMD at Vancouver General Hospital were reviewed. Presence of multifocal (string-of-beads) extracoronary FMD was confirmed by 2 ...
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  Mentions: Hiram G. Bezerra
9. 3D registration of intravascular optical coherence tomography and cryo-image volumes for microscopic-resolution validation
  
  Explore Conference Proceedings Apr 2 2016 Cardiology
  
  High resolution, 100 frames/sec intravascular optical coherence tomography (IVOCT) can distinguish plaque types, but further validation is needed, especially for automated plaque characterization. We developed experimental and 3D registration methods, to provide validation of IVOCT pullback volumes using microscopic, brightfield and fluorescent cryoimage volumes, with optional, exactly registered cryo-histology. The innovation was a method to match an IVOCT pullback images, acquired in the catheter reference frame, to a true ...
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  Mentions: Case Western Reserve University Marco A. Costa Madhusudhana Gargesha
10. Classification of calcium in intravascular OCT images for the purpose of intervention planning
  
  Explore Conference Proceedings Mar 24 2016 Cardiology
  
  The presence of extensive calcification is a primary concern when planning and implementing a vascular percutaneous intervention such as stenting. If the balloon does not expand, the interventionalist must blindly apply high balloon pressure, use an atherectomy device, or abort the procedure. As part of a project to determine the ability of Intravascular Optical Coherence Tomography (IVOCT) to aid intervention planning, we developed a method for automatic classification of calcium ...
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  Mentions: Case Western Reserve University David L. Wilson Hiram G. Bezerra
11. Coronary optical coherence tomography: A practical overview of current clinical applications
  
  Explore ScienceDirect Feb 8 2016 Cardiology
  
  Coronary optical coherence tomography has emerged as the most powerful in-vivo imaging modality to evaluate vessel structure in detail. It is a useful research tool that provides insights into the pathogenesis of coronary artery disease. This technology has an important clinical role that is still being developed. We review the evidence on the wide spectrum of potential clinical applications for coronary optical coherence tomography, which encompass the successive stages in ...
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  Mentions: Case Western Reserve University Marco A. Costa Hiram G. Bezerra
12. Comparison of Stent Expansion Guided by Optical Coherence Tomography Versus Intravascular Ultrasound : The ILUMIEN II Study (Observational Study of Optical Coherence Tomography [OCT] in Patients Undergoing Fractional Flow Reserve [FFR] and Percutaneous Co
  
  Explore ScienceDirect Nov 21 2015 Cardiology
  
  Background The most important predictor of adverse outcomes (thrombosis and restenosis) after stent implantation with IVUS guidance is the degree of stent expansion achieved. Methods We compared the relative degree of stent expansion (defined as the minimal stent area divided by the mean of the proximal and distal reference lumen areas) after OCT-guided stenting in patients in the ILUMIEN (Observational Study of Optical Coherence Tomography [OCT] in Patients Undergoing Fractional ...
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  Mentions: Case Western Reserve University Columbia University Cardiovascular Research Foundation
13. 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 ...
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  Mentions: Imperial College London Case Western Reserve University Leiden University
14. Optical coherence tomography imaging during percutaneous coronary intervention impacts physician decision-making: ILUMIEN I Study
  
  Explore Oxford Journals Aug 6 2015 Cardiology
  
  Aims ILUMIEN I is the largest prospective, non-randomized, observational study of percutaneous coronary intervention (PCI) procedural practice in patients undergoing intra-procedural pre- and post-PCI fractional flow reserve (FFR) and optical coherence tomography (OCT). We report on the impact of OCT on physician decision-making and the association with post-PCI FFR values and early clinical events. Methods and results Optical coherence tomography and documentary FFR were performed pre- and post-PCI in 418 ...
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  Mentions: David Holmes Takashi Akasaka Junya Shite
15. 3-D Stent Detection in Intravascular OCT Using a Bayesian Network and Graph Search
  
  Explore IEEE Xplore Mar 11 2015 Cardiology
  
  Worldwide, many hundreds of thousands of stents are implanted each year to revascularize occlusions in coronary arteries. Intravascular optical coherence tomography (OCT) is an important emerging imaging technique, which has the resolution and contrast necessary to quantitatively analyze stent deployment and tissue coverage following stent implantation. Automation is needed, as current, it takes up to 16 hours to manually analyze hundreds of images and thousands of stent struts from a ...
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  Mentions: Andrew M. Rollins Case Western Reserve University Marco A. Costa
16. Machine Learning Based Analysis of Coronary Stent Images in Intravascular Optical Coherence Tomography Pullbacks (Thesis)
  
  Explore OhioLINK ETD Center Feb 15 2015 Cardiology , Student Theses
  
  ...re reproducible stent studies. Committee David Wilson, Ph.D (Advisor) Andrew Rollins, Ph.D (Committee Member) Hiram Bezerra, Ph.D (Committee Member) Soumya Ray, MD. Ph.D (Committee Member) Weihong Guo, Ph.D (Committee Me...
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  Mentions: Case Western Reserve University Hiram G. Bezerra Hong Lu
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