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https://www.readbyqxmd.com/read/28943493/the-european-collaborative-project-on-inflammation-and-vascular-wall-remodeling-in-atherosclerosis-intravascular-ultrasound-atheroremo-ivus-study
#1
Sanneke P M de Boer, Yael Baran, Hector M Garcia-Garcia, Itamar Eskin, Mattie Lenzen, Marcus E Kleber, Evelyn Regar, Peter J de Jaegere, Jurgen M Ligthart, Robert Jan van Geuns, Tehro Lehtimäki, Reijo Laaksonen, Eric Boersma, Winfried März, Erin Halperin, Patrick W Serruys, Wolfgang Koenig
AIMS: The European Collaborative Project on Inflammation and Vascular Wall Remodelling in Atherosclerosis - Intravascular Ultrasound (ATHEROREMO-IVUS) study has been designed as an exploratory clinical study to investigate the associations between genetic variation, coronary atherosclerosis phenotypes, and plaque vulnerability as determined by IVUS. METHODS AND RESULTS: The ATHEROREMO-IVUS study is a prospective, observational study of 581 patients with stable angina pectoris or acute coronary syndrome (ACS) who were referred for coronary angiography to the Thoraxcenter, Rotterdam, enriched with 265 IBIS-2 participants (total population, n=846)...
September 26, 2017: EuroIntervention
https://www.readbyqxmd.com/read/28939676/the-protective-effect-of-middle-cerebral-artery-calcification-on-symptomatic-middle-cerebral-artery-infarction
#2
Jang-Hyun Baek, Joonsang Yoo, Dongbeom Song, Young Dae Kim, Hyo Suk Nam, Ji Hoe Heo
BACKGROUND AND PURPOSE: The presence of intracranial artery calcification is associated with an increased risk for stroke. However, calcified atherosclerotic plaques are also known to be less vulnerable to rupture. Given this discrepancy, we investigated whether the vulnerability of intracranial arterial atherosclerosis differed based on the presence or absence of calcification. METHODS: We considered consecutive patients with acute stroke in the unilateral middle cerebral artery (MCA) territory...
September 22, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28938968/the-lipid-rich-plaque-study-of-vulnerable-plaques-and-vulnerable-patients-study-design-and-rationale
#3
Ron Waksman, Rebecca Torguson, Mia-Ashley Spad, Hector Garcia-Garcia, James Ware, Rui Wang, Sean Madden, Priti Shah, James Muller
BACKGROUND: It has been hypothesized that the outcome post-PCI could be improved by the detection and subsequent treatment of vulnerable patients and lipid-rich vulnerable coronary plaques (LRP). A near-infrared spectroscopy (NIRS) catheter capable of detecting LRP is being evaluated in The Lipid-Rich Plaque Study. STUDY DESIGN: The LRP Study is an international, multicenter, prospective cohort study conducted in patients with suspected coronary artery disease (CAD) who underwent cardiac catheterization with possible ad hoc PCI for an index event...
October 2017: American Heart Journal
https://www.readbyqxmd.com/read/28931265/diagnostic-and-interventional-optical-angioscopy-in-ex-vivo-carotid-arteries
#4
Luis E Savastano, Neeraj Chaudhary, Carlos Murga-Zamalloa, Michael Wang, Thomas Wang, B Gregory Thompson
BACKGROUND: Angioscopy - or endovascular endoscopy - is a catheter-based technique employing a flexible fiberoptic angioscope to directly visualize arterial lumen. Poor resolution and excessive stiffness of pre-existent angioscopes limited their use clinically. Recent advances resulted in novel fused optical fiber bundle angioscopes with improved flexibility and imaging resolution. Use of these devices in endovascular neurosurgery is still largely unexplored. OBJECTIVE: To evaluate image quality and feasibility of optical angioscopes for diagnostic and interventional neuro-angioscopy in carotid arteries of human cadavers...
February 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28924344/the-return-of-the-vulnerable-plaque-optical-coherence-tomography-imaging-of-a-case-of-a-late-in-stent-restenotic-chronic-total-occlusion
#5
Dilbahar S Mohar, Pranav M Patel, Alisha K Grewal, Prabhsimran Mohar, Morton J Kern
Although the use of drug-eluting stents (DES) has dramatically decreased the incidence of in-stent restenosis (ISR), concerns regarding the late manifestations of ISR remain. Optical coherence tomography (OCT) imaging provides unique insights into characteristics and patterns of ISR. We report a case of late DES ISR with unusual heterogeneous intracoronary luminal characteristics suggestive of vulnerable atherosclerotic plaque activity by OCT imaging. This case demonstrates that late ISR after DES may involve more than mere neointimal hyperplasia with lesion-associated craters, septae, and neoatherosclerosis...
September 2017: International Journal of Angiology: Official Publication of the International College of Angiology, Inc
https://www.readbyqxmd.com/read/28921914/comparison-of-relation-between-multiple-parameters-of-glycemic-variability-and-coronary-plaque-vulnerability-assessed-by-virtual-histology-intravascular-ultrasound
#6
Natsu Otowa-Suematsu, Kazuhiko Sakaguchi, Hisako Komada, Tomoaki Nakamura, Anna Sou, Yushi Hirota, Masaru Kuroda, Toshiro Shinke, Ken-Ich Hirata, Wataru Ogawa
AIMS/INTRODUCTION: Increased glycemic variability is an important contributing factor to coronary artery disease. Although various parameters of glycemic variability can be derived by continuous glucose monitoring, the clinical relevance of individual parameters has remained unclear. We have now analyzed the relation of such parameters to coronary plaque vulnerability MATERIALS AND METHODS: The standard deviation of glucose levels (SD glucose), mean amplitude of glycemic excursions (MAGE), continuous overlapping net glycemic action calculated every 1 h (CONGA-1), and mean of daily differences (MODD) were calculated from continuous glucose monitoring data for 53 subjects hospitalized for percutaneous coronary intervention...
September 16, 2017: Journal of Diabetes Investigation
https://www.readbyqxmd.com/read/28917119/a-mechanistic-model-for-drug-release-from-plga-based-drug-eluting-stent-a-computational-study
#7
Jahed Naghipoor, Timon Rabczuk
Atherosclerosis in the coronary artery is one of the leading causes of death in the world. The stenting as a minimally invasive technique was considered as an effective tool to reduce the severity of atherosclerotic stenosis. In-stent restenosis is the main drawback of the stenting in the coronary artery. Understanding the mechanism of drug release from drug-eluting stents and drug uptake in the arterial wall and obtaining more information about their functionality using mathematical modeling and numerical simulation, could be considered as a predictive tool to investigate in-stent restenosis growth which is experimentally expensive to study...
September 8, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28916789/whole-body-and-hematopoietic-adam8-deficiency-does-not-influence-advanced-atherosclerotic-lesion-development-despite-its-association-with-human-plaque-progression
#8
Kosta Theodorou, Emiel P C van der Vorst, Marion J Gijbels, Ine M J Wolfs, Mike Jeurissen, Thomas L Theelen, Judith C Sluimer, Erwin Wijnands, Jack P Cleutjens, Yu Li, Yvonne Jansen, Christian Weber, Andreas Ludwig, Jacob F Bentzon, Jörg W Bartsch, Erik A L Biessen, Marjo M P C Donners
Although A Disintegrin And Metalloproteinase 8 (ADAM8) is not crucial for tissue development and homeostasis, it has been implicated in various inflammatory diseases by regulating processes like immune cell recruitment and activation. ADAM8 expression has been associated with human atherosclerosis development and myocardial infarction, however a causal role of ADAM8 in atherosclerosis has not been investigated thus far. In this study, we examined the expression of ADAM8 in early and progressed human atherosclerotic lesions, in which ADAM8 was significantly upregulated in vulnerable lesions...
September 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28893252/association-between-carotid-plaque-characteristics-and-acute-cerebral-infarction-determined-by-mri-in-patients-with-type-2-diabetes-mellitus
#9
Beibei Sun, Xiao Li, Xiaosheng Liu, Xiaoqian Ge, Qing Lu, Xihai Zhao, Jun Pu, Jianrong Xu, Huilin Zhao
BACKGROUND: Type 2 diabetes mellitus (T2DM) might aggravate the carotid plaque vulnerability, and increase the risk for ischemic stroke. Few studies reported the acute stroke subtype with carotid plaque characteristics in T2DM patients. This study aimed to investigate the association between carotid plaque characteristics and acute cerebral infarct (ACI) lesion features determined by MRI in T2DM patients. METHODS: Patients with acute cerebrovascular syndrome in internal carotid artery territory were recruited...
September 11, 2017: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/28891324/relationship-between-monocyte-to-lymphocyte-ratio-and-coronary-plaque-vulnerability-in-patients-with-stable-angina
#10
Zeyuan Fan, Hanhua Ji, Yang Li, Xinwen Jian, Li Li, Tao Liu
AIM: To investigate the relationship between monocyte-to-lymphocyte ratio (MLR) and plaque vulnerability assessed by virtual histology intravascular ultrasound in patients with stable angina. METHODS: 133 patients with stable angina were enrolled. RESULTS: MLR was found to be an independent risk factor of thin cap fibrous atheroma (OR: 2.61; p = 0.025). MLR could differentiate thin cap fibrous atheroma with a sensitivity of 73.7% and a specificity of 61...
September 11, 2017: Biomarkers in Medicine
https://www.readbyqxmd.com/read/28888073/selective-decline-of-neurotrophin-and-neurotrophin-receptor-genes-within-ca1-pyramidal-neurons-and-hippocampus-proper-correlation-with-cognitive-performance-and-neuropathology-in-mild-cognitive-impairment-and-alzheimer-s-disease
#11
Stephen D Ginsberg, Michael H Malek-Ahmadi, Melissa J Alldred, Shaoli Che, Irina Elarova, Yinghua Chen, Freddy Jeanneteau, Thorsten M Kranz, Moses V Chao, Scott E Counts, Elliott J Mufson
Hippocampal CA1 pyramidal neurons, a major component of the medial temporal lobe memory circuit, are selectively vulnerable during the progression of Alzheimer's disease (AD). The cellular mechanism(s) underlying degeneration of these neurons and the relationship to cognitive performance remains largely undefined. Here, we profiled neurotrophin and neurotrophin receptor gene expression within microdissected CA1 neurons along with regional hippocampal dissections from subjects who died with a clinical diagnosis of no cognitive impairment (NCI), mild cognitive impairment (MCI), or AD using laser capture microdissection (LCM), custom-designed microarray analysis, and qPCR of CA1 subregional dissections...
September 9, 2017: Hippocampus
https://www.readbyqxmd.com/read/28886156/loss-of-sprr3-in-apoe-mice-leads-to-atheroma-vulnerability-through-akt-dependent-and-independent-effects-in-vsmcs
#12
Caressa D Lietman, Amanda K Segedy, Bin Li, Sergio Fazio, James B Atkinson, MacRae F Linton, Pampee P Young
Vascular smooth muscle cells (VSMCs) represent important modulators of plaque stability in advanced lesions. We previously reported that loss of small proline-rich repeat protein 3 (Sprr3), leads to VSMC apoptosis in a PI3K/Akt-dependent manner and accelerates lesion progression. Here, we investigated the role of Sprr3 in modulating plaque stability in hyperlipidemic ApoE-/- mice. We show that loss of Sprr3 increased necrotic core size and reduced cap collagen content of atheromas in brachiocephalic arteries with evidence of plaque rupture and development of intraluminal thrombi...
2017: PloS One
https://www.readbyqxmd.com/read/28877718/aortic-atheroma-as-a-source-of-stroke-assessment-of-embolization-risk-using-3d-cmr-in-stroke-patients-and-controls
#13
Thomas Wehrum, Iulius Dragonu, Christoph Strecker, Florian Schuchardt, Anja Hennemuth, Johann Drexl, Thomas Reinhard, Daniel Böhringer, Werner Vach, Jürgen Hennig, Andreas Harloff
BACKGROUND: It was our purpose to identify vulnerable plaques in the thoracic aorta using 3D multi-contrast CMR and estimate the risk of cerebral embolization using 4D flow CMR in cryptogenic stroke patients and controls. METHODS: One hundred patients (40 with cryptogenic stroke, 60 ophthalmologic controls matched for age, sex and presence of hypertension) underwent a novel 3D multi-contrast (T1w, T2w, PDw) CMR protocol at 3 Tesla for plaque detection and characterization within the thoracic aorta, which was combined with 4D flow CMR for mapping potential embolization pathways...
September 6, 2017: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/28877655/developing-a-strategy-for-interventional-molecular-imaging-of-oxidized-low-density-lipoprotein-in-atherosclerosis
#14
Samata S Pandey, Dorian O Haskard, Ramzi Y Khamis
The identification of vulnerable coronary artery atherosclerotic plaques offers the prospect of either localized or systematic therapeutic targeting in order to prevent myocardial infarction. Molecular imaging of atherosclerosis adds to morphological imaging by focusing on the immunobiology hidden in and behind the endothelium and therefore may be able to improve the identification of prospective culprit lesions. Our focus has been on identifying arterial accumulation of oxidized low-density lipoprotein (oxLDL) by exploiting advances in knowledge of vascular pathobiology...
January 2017: Molecular Imaging
https://www.readbyqxmd.com/read/28877564/intracranial-atherosclerosis-from-microscopy-to-high-resolution-magnetic-resonance-imaging
#15
Wen-Jie Yang, Ka-Sing Wong, Xiang-Yan Chen
Intracranial atherosclerosis is one of the leading causes of ischemic stroke and occurs more commonly in patients of Asian, African or Hispanic origin than in Caucasians. Although the histopathology of intracranial atherosclerotic disease resembles extracranial atherosclerosis, there are some notable differences in the onset and severity of atherosclerosis. Current understanding of intracranial atherosclerotic disease has been advanced by the high-resolution magnetic resonance imaging (HRMRI), a novel emerging imaging technique that can directly visualize the vessel wall pathology...
September 6, 2017: Journal of Stroke
https://www.readbyqxmd.com/read/28875290/evaluation-of-99m-tc-radiolabeled-macrophage-mannose-receptor-specific-nanobodies-for-targeting-of-atherosclerotic-lesions-in-mice
#16
Gezim Bala, Henri Baudhuin, Isabel Remory, Kris Gillis, Pieterjan Debie, Ahmet Krasniqi, Tony Lahoutte, Geert Raes, Nick Devoogdt, Bernard Cosyns, Sophie Hernot
PURPOSE: Macrophage accumulation characterizes the development of atherosclerotic plaques, and the presence of certain macrophage subsets might be an indicator of plaque phenotype and (in)stability. The macrophage mannose receptor (MMR) is expressed on alternatively activated macrophages and found at sites of intraplaque hemorrhage and neovascularization. It has been proposed as target to identify vulnerable plaques. Therefore, we aimed to assess the feasibility of using anti-MMR nanobodies (Nbs) as molecular tracers for nuclear imaging in an animal model of atherosclerosis...
September 5, 2017: Molecular Imaging and Biology: MIB: the Official Publication of the Academy of Molecular Imaging
https://www.readbyqxmd.com/read/28866908/high-burden-of-coronary-atherosclerosis-in-patients-with-a-new-diagnosis-of-type-2-diabetes
#17
Monija Mrgan, Kristian L Funck, Sara Gaur, Kristian A Øvrehus, Damini Dey, Martin W Kusk, Bjarne L Nørgaard, Jørgen B Gram, Michael H Olsen, Jeppe Gram, Niels Peter R Sand
PURPOSE: The purposes of this study were to compare the presence, extent and composition of coronary plaques in asymptomatic patients with newly diagnosed type 2 diabetes to age- and sex-matched controls. METHODS: Patients with newly diagnosed (<1 year) type 2 diabetes ( n = 44) and controls ( n = 44) underwent contrast-enhanced coronary computed tomography angiography. Advanced plaque analysis including total plaque volume and volumes of plaque components (calcified plaque and non-calcified plaque, including low-attenuation [low-density non-calcified plaque]) was performed using validated semi-automated software...
September 1, 2017: Diabetes & Vascular Disease Research
https://www.readbyqxmd.com/read/28856989/from-vulnerable-plaque-to-blood-healthy-therapy
#18
Sun Yuhua, Wang Baoping
Cardiovascular atherosclerotic disease is the leading cause of death in China and in Western nations. People with plaque or stenosis in the coronary artery or the carotid artery are the most susceptible population to suffer from acute events. Current investigations showed that plaque with the characteristics of intra-plaque hemorrhage or a thin cap with a large lipid core was causally associated with vulnerable plaque and plaque rupture. Of the many plaque ruptures occurring in patients with atherosclerotic disease, very few will trigger symptomatic events, rendering it exceedingly difficult to predict adverse outcomes...
August 1, 2017: Perfusion
https://www.readbyqxmd.com/read/28855886/advanced-imaging-of-intracranial-atherosclerosis-lessons-from-interventional-cardiology
#19
Davor Pavlin-Premrl, Rahul Sharma, Bruce C V Campbell, J Mocco, Nicholas L Opie, Thomas J Oxley
Intracranial atherosclerosis is a major cause of ischemic stroke. Patients with a high degree of stenosis have a significant rate of stroke despite medical therapy. Two randomized trials of stenting have failed to show benefit. Improving periprocedural complication rates and patient selection may improve stenting outcomes. Fractional flow reserve (FFR), intravascular ultrasound (IVUS), and optical coherence tomography (OCT) are intravascular imaging techniques employed to improve patient selection and stent placement in interventional cardiology...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28818260/transcranial-doppler-monitoring-for-microemboli-a-marker-of-a-high-risk-carotid-plaque
#20
REVIEW
J David Spence
In the United States, 90% of carotid intervention is being performed for asymptomatic carotid stenosis, even though 90% of patients would be better treated with intensive medical therapy. This is being justified by comparing risks of stroke or death with medical therapy during clinical trials completed decades ago (approximately 2% per year) with risks of intervention with carotid artery stenting (CAS) versus carotid endarterectomy in recent trials that did not have a medical arm. Such extrapolations are, simply put, invalid...
March 2017: Seminars in Vascular Surgery
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