1. Hiram G. Bezerra

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    1. Mentioned In 66 Articles

    2. Differences determined by optical coherence tomography volumetric analysis in non-culprit lesion morphology and inflammation in ST-segment elevation myocardial infarction and stable angina pectoris patients

      Differences determined by optical coherence tomography volumetric analysis in non-culprit lesion morphology and inflammation in ST-segment elevation myocardial infarction and stable angina pectoris patients
      ...dial infarction and stable angina pectoris patients 1. Micheli Zanotti Galon MD^1,*, 2. Zhao Wang PhD^2, 3. Hiram G. Bezerra MD, PhD^3, 4. Pedro Alves Lemos MD, PhD^1, 5. Audrey Schnell PhD^3, 6. David L. Wilson PhD^2,...
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    3. Mechanisms of Atherothrombosis and Vascular Response to Primary Percutaneous Coronary Intervention in Women Versus Men With Acute Myocardial Infarction : Results of the OCTAVIA (Optical Coherence Tomography Assessment of Gender Diversity in Primary Angiop

      Mechanisms of Atherothrombosis and Vascular Response to Primary Percutaneous Coronary Intervention in Women Versus Men With Acute Myocardial Infarction : Results of the OCTAVIA (Optical Coherence Tomography Assessment of Gender Diversity in Primary Angiop

      Objectives This study sought to assess in vivo sex differences in the pathophysiology of ST-segment elevation myocardial infarction (STEMI) and vascular response to primary percutaneous coronary intervention (PCI). Background There is no consensus on whether differences in the pathophysiology of STEMI and response to primary PCI between women and men reflect biological factors as opposed to differences in age. Methods In this prospective, multicenter study, 140 age-matched men and women with STEMI undergoing primary PCI with everolimus-eluting stent were investigated with intravascular optical coherence tomography, histopathology-immunohistochemistry of thrombus aspirates, and serum biomarkers. Primary endpoints were the percentages of culprit plaque ...

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    4. Impact of Main-Branch Calcified Plaque on Side-Branch Stenosis in Bifurcation Stenting: An Optical Coherence Tomography Study

      Impact of Main-Branch Calcified Plaque on Side-Branch Stenosis in Bifurcation Stenting: An Optical Coherence Tomography Study

      Percutaneous coronary intervention (PCI) in bifurcations is routinely performed, however this procedure is associated with higher rates of adverse events compared non-bifurcation PCI [1,2]. While bifurcation PCI per se leads to progressively higher rates of periprocedural myocardial infarction as its complexity increases (i.e., 1- vs. 2-stent technique) [3], side-branch (SB) stenosis (SBS) after main-branch (MB) stenting may further contribute to myocardial ischemia and necrosis; in addition, it might require additional intervention and resource utilization.

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    5. Intravascular Frequency-Domain Optical Coherence Tomography Assessment of Carotid Artery Disease in Symptomatic and Asymptomatic Patients

      Intravascular Frequency-Domain Optical Coherence Tomography Assessment of Carotid Artery Disease in Symptomatic and Asymptomatic Patients

      Objectives The goal of this study was to investigate carotid plaque characteristics in symptomatic versus asymptomatic patients with the use of nonocclusive optical coherence tomography (OCT). Background The identification of asymptomatic patients with carotid disease who are at risk of stroke remains a challenge. There is an increasing awareness that plaque characteristics may best risk-stratify this population. We hypothesized that OCT, a new high-resolution (∼10 μm) imaging modality, might be useful for the identification of low-risk versus high-risk carotid plaque features and help us to understand the relationship between carotid diameter stenosis and plaque morphology to ischemic stroke. Methods Fifty-three ...

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    6. Segmentation and quantification for intravascular optical coherence tomography images

      Segmentation and quantification for intravascular optical coherence tomography images

      A system and related methods for automatic or semi-automatic segmentation and quantification of blood vessel structure and physiology, including segmentation and quantification of lumen, guide wire, vessel wall, calcified plaques, fibrous caps, macrophages, metallic and bioresorbable stents are described, and including visualization of results. Calcified plaque segmentation can be used to estimate the distribution of superficial calcification and inform strategies stenting. Volumetric segmentation and quantification of fibrous caps can provide more comprehensive information of the mechanisms behind plaque rupture. Quantification of macrophages can aid diagnosis and prediction of unstable plaque and associated acute coronary events. Automated detection and quantification of ...

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    7. Feasibility of Optical Coherence Tomography in Children with Kawasaki Disease and Pediatric Heart Transplant Recipients

      Feasibility of Optical Coherence Tomography in Children with Kawasaki Disease and Pediatric Heart Transplant Recipients

      Background —Optical Coherence Tomography (OCT) is a high-resolution intravascular imaging technique used in adults. We tested the hypothesis that OCT could identify coronary abnormalities not seen by angiography in children with a history of Kawasaki Disease (KD) and pediatric heart transplant (TX) recipients. Methods and Results —KD patients and TX recipients were evaluated between December 2012 and October 2013 with angiography and OCT (Ilumien System, LightLabs, St Jude Medical, Westford, MA). Modifications were made to the adult OCT protocol to adapt this technique for children. Serial cross sectional area (CSA) measurements of the lumen, intima and media were made. Entire ...

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    8. Optical coherence tomography and intravascular ultrasound of double kissing crush coronary bifurcation stenting

      Optical coherence tomography and intravascular ultrasound of double kissing crush coronary bifurcation stenting

      A 55-year-old male underwent percutaneous coronary intervention (PCI) of a Medina 1,1,1 circumflex (LCx) and a first obtuse marginal (OM1) bifurcation lesion. A double kissing crush technique was performed, utilising a 2.75×12 mm everolimus-eluting stent (EES) in OM1 and a XIENCE V 4.0×15 mm EES (Abbott Vascular, Santa Clara, CA, USA) in the LCx (Online Figure 1). Intravascular ultrasound (IVUS) and optical coherence tomography (OCT) runs were performed (Online Figure 2, Online Figure 3, Moving image 1). 3D reconstruction of the OCT further clarified the reconstruction of the bifurcation carina and paving, in particular ...

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    9. Optical coherence tomography of the intracranial vasculature and Wingspan stent in a patient

      Optical coherence tomography of the intracranial vasculature and Wingspan stent in a patient

      A 67-year-old man with medically refractory vertebrobasilar insufficiency and short segment occlusions of the intracranial vertebral arteries was treated with angioplasty and stent placement. Fifteen hours after the procedure the patient developed symptoms of posterior fossa ischemia and repeat angiography showed thrombus formation within the stent which was treated with thrombolytic and aggressive antiplatelet therapy. Angiography revealed lysis of the clot, but concerns regarding the mechanism of the thrombotic phenomenon prompted frequency-domain optical coherence tomography (FDOCT) assessment. FDOCT provided excellent visualization of the stent and vessel wall interactions, as well as excluding residual flow-limiting stenosis, obviating the need for further ...

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    10. Frequency-domain optical coherence tomography evaluation of a patient with Kawasaki disease and severely calcified plaque

      Frequency-domain optical coherence tomography evaluation of a patient with Kawasaki disease and severely calcified plaque
      ...ons + New Tokyo Hospital, Chiba, Japan , * Kensuke Takagi Affiliations + New Tokyo Hospital, Chiba, Japan , * Hiram G. Bezerra Affiliations + University Hospitals, Case Medical Center, Cleveland, OH, United States , * Su...
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    11. Comprehensive overview of definitions for optical coherence tomography-based plaque and stent analyses

      Comprehensive overview of definitions for optical coherence tomography-based plaque and stent analyses

      Optical coherence tomography (OCT) is the current state-of-the-art intracoronary imaging modality that allows visualization of detailed morphological characteristics of both atherosclerotic plaque and stent. So far, three expert review documents have been released for standardization of OCT image analysis. In the real world, a variety of definitions are being used by different groups and by different core laboratories to analyze OCT findings because of different clinical/procedural contexts in which OCT research has been carried out. This comprehensive overview is aimed to summarize different applicable definitions used by different research groups in plaque and stent analysis using OCT. In addition ...

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    12. Frequency-Domain Optical Coherence Tomography Assessment of Unfavorable Kissing-Balloon Result in Unprotected Left Main Intervention

      Frequency-Domain Optical Coherence Tomography Assessment of Unfavorable Kissing-Balloon Result in Unprotected Left Main Intervention

      A 67-year-old man with a history of hypertension and dyslipidemia was admitted because of angina symptoms. Coronary angiography (CAG) showed an eccentric lesion of the distal unprotected left main coronary artery (ULMCA) involving the ostium of the left anterior descending coronary artery (LAD) (Figure 1 A). ULMCA/LAD crossover stent implantation was conducted with a 3.5 × 18-mm everolimus-eluting stent (EES) (XIENCE PRIME, Abbott Vascular, Santa Clara, California) at 12 atm, followed by the kissing-balloon technique (KBT). Despite a favorable CAG result (Figure 2 A), frequency-domain optical coherence tomography (FD-OCT) revealed stent strut deformation towards the LAD, leading to a ...

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    13. Serial assessment of vessel interactions after drug-eluting stent implantation in unprotected distal left main coronary artery disease using frequency-domain optical coherence tomography

      Serial assessment of vessel interactions after drug-eluting stent implantation in unprotected distal left main coronary artery disease using frequency-domain optical coherence tomography

      Objectives This study sought to assess stent-vessel interactions after drug-eluting stent (DES) implantation in unprotected left main coronary artery (ULM) by frequency-domain optical coherence tomography (FD-OCT). Background Percutaneous coronary intervention using DES in ULM has been increasingly performed in routine practice. Recently, FD-OCT assessments of DES-vessel interactions have been used as surrogates for DES safety; however, there are no FD-OCT studies in ULM. Methods We prospectively enrolled 33 consecutive patients with ULM disease treated with sirolimus- (n = 11) and everolimus-eluting stents (n = 22). FD-OCT assessments were performed post-percutaneous coronary intervention and at 9-month follow-up. Three different segments of ULM were ...

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    14. Novel use of optical coherence tomography

      Novel use of optical coherence tomography

      Currently in use by interventional cardiology for the intravascular evaluation of coronary arteries, optical coherence tomography (OCT) has proven to be effective in the evaluation of atherosclerotic disease and further therapeutic management. We report a novel use of OCT technology in the case of a 46-year-old man with sudden onset blurred vision and greater than 70% stenosis of his left vertebral artery. To date, no detailed descriptions or case reports have previously been reported regarding the use of neuroendovascular OCT in diseased arteries.

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  2. About Hiram G. Bezerra

    Hiram G. Bezerra, M.D., is with the University Hospitals Case Medical Center-Interventional Cardiovascular Center and Research & Innovation Center.