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calcified plaque models

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https://www.readbyqxmd.com/read/28527587/relationship-between-carotid-computed-tomography-dual-energy-and-brain-leukoaraiosis
#1
Luca Saba, Roberto Sanfilippo, Antonella Balestrieri, Fulvio Zaccagna, Giovanni Maria Argiolas, Jasjit S Suri, Roberto Montisci
BACKGROUND: The purpose of this study was to assess if there is a correlation between the carotid computed tomography (CT) Hounsfield unit (HU)-based plaque attenuation values measured using dual-energy CT (DECT) scanner and brain leukoaraiosis (LA). METHODS: Fifty consecutive patients (34 males, 16 females; mean age, 69 years; age range, 46-84 years) who underwent carotid CT and brain magnetic resonance imaging were included in the study. CT examinations were performed with a DECT scanner, and LA lesion volume quantification was performed using a semiautomated segmentation technique...
May 17, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28483812/coronary-plaque-characterization-in-psoriasis-reveals-high-risk-features-which-improve-following-treatment-in-a-prospective-observational-study
#2
Joseph B Lerman, Aditya A Joshi, Abhishek Chaturvedi, Tsion M Aberra, Amit K Dey, Justin A Rodante, Taufiq Salahuddin, Jonathan H Chung, Anshuma Rana, Heather L Teague, Jashin J Wu, Martin P Playford, Benjamin N Lockshin, Marcus Y Chen, Veit Sandfort, David A Bluemke, Nehal N Mehta
Background -Psoriasis, a chronic inflammatory disease associated with an accelerated risk of MI, provides an ideal human model to study inflammatory atherogenesis in vivo We hypothesized that the increased cardiovascular risk observed in psoriasis would be partially attributable to an elevated subclinical coronary artery disease (CAD) burden composed of non-calcified plaques with high-risk features. However, inadequate efforts have been made to directly measure CAD in this vulnerable population. As such, we sought to compare total (TB) and non-calcified (NCB) coronary plaque burden, and high-risk plaque (HRP) prevalence, between psoriasis patients (n=105), hyperlipidemic patients eligible for statin therapy under NCEP-ATP III guidelines (n=100) who were ~10 years older, and non-psoriasis healthy volunteers (HV) (n=25)...
May 8, 2017: Circulation
https://www.readbyqxmd.com/read/28483581/prognostic-value-of-segment-involvement-score-compared-to-other-measures-of-coronary-atherosclerosis-by-computed-tomography-a-systematic-review-and-meta-analysis
#3
Chadi Ayoub, Fernanda Erthal, Mahmoud A Abdelsalam, M Hassan Murad, Zhen Wang, Patricia J Erwin, Graham S Hillis, Leonard Kritharides, Benjamin J W Chow
BACKGROUND: The segment involvement score (SIS) is a semiquantitative measure of the extent of atherosclerosis burden by coronary computed tomography angiography (CTA). We sought to evaluate by meta-analysis the prognostic value of SIS, and to compare it with other CTA measures of coronary artery disease (CAD). METHODS: Electronic databases from 1946 to January 2016 were searched. Studies reporting SIS, or an equivalent measure by coronary CTA, and clinical outcomes were included...
May 3, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28392001/nakagami-m-parametric-imaging-for-atherosclerotic-plaque-characterization-using-the-coarse-to-fine-method
#4
Meng Han, Jinjin Wan, Yongfeng Zhao, Xiaodong Zhou, Mingxi Wan
The Nakagami model was used to analyze the statistical differences in ultrasound backscattered signals between different plaque types. To improve image resolution, Nakagami-m parametric imaging using the coarse-to-fine method based on the maximum likelihood estimation (CTF-BOW) was proposed for atherosclerotic plaque characterization. Simulation results confirmed that the CTF-BOW method significantly outperforms the sliding window method in precision, smoothness and resolution. Preliminary in vivo results (n = 45) indicated that the ranges of the m parameters for calcified, mixed and echolucent plaques are, respectively, 0...
June 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28343599/presence-characteristics-and-volumes-of-coronary-plaque-determined-by-computed-tomography-angiography-in-young-type-2-diabetes-mellitus
#5
Negin Nezarat, Matthew J Budoff, Yanting Luo, Sirous Darabian, Rine Nakanishi, Dong Li, Nasim Sheidaee, Michael Kim, Anas Alani, Suguru Matsumoto, Sina Rahmani, Mitsuru Kanisawa, Indre Ceponiene, Kazuhiro Osawa, Hong Qi, Sajad Hamal, Pieter Kitslaar, Alexander Broersen, Ferdinand Flores, Eli Ipp, Bahram Khazai
Prevention and management of coronary artery disease (CAD) is of great concern in patients with diabetes mellitus. Although the impact of coronary atherosclerosis is described well for subjects older than 40 years, the prevalence and types of coronary atherosclerosis in young patients are not well known. The aim of this study was to evaluate the prevalence, extent, severity, and volumes of coronary plaque in type 2 diabetes mellitus (T2DM) population younger than of 40 years. This prospective study enrolled 181 subjects (25-40 year old) undergoing coronary computed tomography angiography, with 86 T2DM and 95 nondiabetic age/gender-matched subjects...
March 1, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28292668/free-dna-precipitates-calcium-phosphate-apatite-crystals-in-the-arterial-wall-in%C3%A2-vivo
#6
Raphaël Coscas, Marie Bensussan, Marie-Paule Jacob, Liliane Louedec, Ziad Massy, Jeremy Sadoine, Michel Daudon, Catherine Chaussain, Dominique Bazin, Jean-Baptiste Michel
BACKGROUND AND AIMS: The arterial wall calcium score and circulating free DNA levels are now used in clinical practice as biomarkers of cardiovascular risk. Calcium phosphate apatite retention in the arterial wall necessitates precipitation on an anionic platform. Here, we explore the role of tissue-free DNA as such a platform. METHODS: The first step consisted of histological observation of samples from human and rat calcified arteries. Various stains were used to evaluate colocalization of free DNA with calcified tissue (alizarin red, fluorescent Hoechst, DNA immunostaining and TUNEL assay)...
April 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28219666/relation-of-iliac-artery-calcium-with-adiposity-measures-and-peripheral-artery-disease
#7
Jane J Lee, Alison Pedley, Ido Weinberg, Kathryn A Britton, Joseph M Massaro, Udo Hoffmann, Emily Manders, Caroline S Fox, Joanne M Murabito
Arterial calcification is associated with cardiovascular morbidity and mortality. To improve the understanding of the pathogenesis involved with iliac artery calcium (IAC), we sought to examine the associations between the burden of IAC with adiposity measures and peripheral artery disease (PAD). Participants (n = 1,236, 52% women, mean age 60 years) were drawn from the Framingham Heart Study Offspring cohort who underwent multidetector computed tomography. The extent of IAC was quantified based on calcified atherosclerotic plaques detected in the iliac arteries...
April 15, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28190783/a-retrospective-analysis-of-catheter-based-sources-in-intravascular-brachytherapy
#8
J DeCunha, C Janicki, S A Enger
PURPOSE: Coronary artery disease involves the deposition of plaque along the walls of a coronary artery leading to narrowed or blocked vessels (stenosis) and is one of the main causes of death in developed countries. Percutaneous transluminal coronary angioplasty (PTCA) is used to reverse stenosis. Restenosis (renarrowing) of the treated vessel is a major complication of PTCA. A metal mesh tube (stent) can be placed inside the vessel to prevent restenosis. Tissue stress incurred during PTCA and stenting can provoke neointimal cell proliferation leading to in-stent restenosis (ISR)...
May 2017: Brachytherapy
https://www.readbyqxmd.com/read/28176255/partial-volume-correction-for-improved-pet-quantification-in-18-f-naf-imaging-of-atherosclerotic-plaques
#9
Jacobo Cal-Gonzalez, Xiang Li, Daniel Heber, Ivo Rausch, Stephen C Moore, Klaus Schäfers, Marcus Hacker, Thomas Beyer
BACKGROUND: Accurate quantification of plaque imaging using (18)F-NaF PET requires partial volume correction (PVC). METHODS: PVC of PET data was implemented by the use of a local projection (LP) method. LP-based PVC was evaluated with an image quality (NEMA) and with a thorax phantom with "plaque-type" lesions of 18-36 mL. The validated PVC method was then applied to a cohort of 17 patients, each with at least one plaque in the carotid or ascending aortic arteries...
February 7, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28150055/numerical-modeling-of-nitinol-stent-oversizing-in-arteries-with-clinically-relevant-levels-of-peripheral-arterial-disease-the-influence-of-plaque-type-on-the-outcomes-of-endovascular-therapy
#10
Can Gökgöl, Nicolas Diehm, Philippe Büchler
Oversizing of the Nitinol stents in the femoro-popliteal arterial tract is commonly performed by clinicians and further encouraged by stent manufacturers. However, in spite of the procedure's supposed benefits of strong wall apposition and increased luminal gain, its effects on the mechanical behavior of arteries with peripheral arterial disease are not fully clear. In this study, finite element (FE) analyses of endovascular revascularization of an idealized artery with 70% stenosis and three different plaque types have been performed to examine the influence of Nitinol stent oversizing on the arterial stresses and acute lumen gain...
June 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28109934/coronary-plaque-burden-and-adverse-plaque-characteristics-are-increased-in-healthy-relatives-of-patients-with-early-onset-coronary-artery-disease
#11
Morten K Christiansen, Jesper M Jensen, Bjarne L Nørgaard, Damini Dey, Hans Erik Bøtker, Henrik K Jensen
OBJECTIVES: This study characterized and quantified subclinical atherosclerosis by coronary computed tomography angiography (CTA) in first-degree relatives of patients with early onset coronary artery disease (CAD). BACKGROUND: A strong family history of CAD is an important risk factor for adverse cardiovascular events. Whether predisposed individuals suffer an increased burden of coronary atherosclerosis and adverse plaque features is not known. METHODS: We included 88 healthy middle-aged first-degree relatives from 59 families with early onset CAD...
January 12, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28068560/effect-of-sarpogrelate-a-selective-5-ht2a-receptor-antagonist-on-characteristics-of-coronary-artery-disease-in-patients-with-type-2-diabetes
#12
Dong-Hwa Lee, Eun Ju Chun, Jee Hye Hur, Se Hee Min, Jie-Eun Lee, Tae Jung Oh, Kyoung Min Kim, Hak Chul Jang, Seung Jin Han, Doo Kyoung Kang, Hae Jin Kim, Soo Lim
BACKGROUND AND AIMS: Sarpogrelate, a 5-hydroxytryptamine type 2A antagonist, is a potential antiplatelet agent. We performed a randomized study to evaluate the effect of sarpogrelate on vascular health in Korean patients with diabetes. METHODS: Forty diabetic patients aged 58.6 ± 6.8 years with 10-75% coronary artery stenosis, as assessed by coronary computed tomography angiography, were randomly assigned to sarpogrelate 300 mg/day plus aspirin 100 mg/day (SPG + ASA group) or aspirin 100 mg/day alone (ASA group) for 6 months...
February 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28065380/iterative-model-reconstruction-reduces-calcified-plaque-volume-in-coronary-ct-angiography
#13
Mihály Károlyi, Bálint Szilveszter, Márton Kolossváry, Richard A P Takx, Csilla Celeng, Andrea Bartykowszki, Ádám L Jermendy, Alexisz Panajotu, Júlia Karády, Rolf Raaijmakers, Walter Giepmans, Béla Merkely, Pál Maurovich-Horvat
OBJECTIVE: To assess the impact of iterative model reconstruction (IMR) on calcified plaque quantification as compared to filtered back projection reconstruction (FBP) and hybrid iterative reconstruction (HIR) in coronary computed tomography angiography (CTA). METHODS: Raw image data of 52 patients who underwent 256-slice CTA were reconstructed with IMR, HIR and FBP. We evaluated qualitative, quantitative image quality parameters and quantified calcified and partially calcified plaque volumes using automated software...
February 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28024654/coronary-computed-tomography-angiography-derived-plaque-quantification-in-patients-with-acute-coronary%C3%A2-syndrome
#14
Christian Tesche, Damiano Caruso, Carlo N De Cecco, Darby C Shuler, Jess D Rames, Moritz H Albrecht, Taylor M Duguay, Akos Varga-Szemes, David Jochheim, Moritz Baquet, Richard R Bayer, Ullrich Ebersberger, Sheldon E Litwin, Salvatore A Chiaramida, Ellen Hoffmann, U Joseph Schoepf
This study investigated the discriminatory value of quantitative atherosclerotic plaque markers derived from coronary computed tomography angiography (cCTA) in patients with first acute coronary syndrome (ACS) compared with patients with stable coronary artery disease (CAD). Forty patients (56.9 ± 9.3 years, 55% men) admitted with their first ACS and Framingham risk score-matched controls with stable CAD were retrospectively analyzed. All patients had undergone cCTA followed by invasive coronary angiography...
March 1, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/27943103/numerical-study-to-indicate-the-vulnerability-of-plaques-using-an-idealized-2d-plaque-model-based-on-plaque-classification-in-the-human-coronary-artery
#15
Wookjin Lee, Gyu Jin Choi, Seong Wook Cho
Atherosclerosis is one of the leading causes of death in the world. In this study, an idealized 2D plaque model based on plaque classification in the coronary artery is developed. When creating the idealized 2D model for each plaque type (fibrocalcic, FC; fibrofatty, FT; calcified fibroatheroma, CaFA; fibroatheroma, FA; calcified thin-cap fibroatheroma, CaTCFA; thin-cap fibroatheroma, TCFA), the cap thickness and stenosis by diameter were set as variables. In order to establish the correlation between each plaque type and plaque rupture, a numerical simulation was performed and the stress and stress gradient were reviewed to analyze the mechanical behavior...
December 9, 2016: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/27932363/monocyte-count-as-a-predictor-of-cardiovascular-mortality-in-older-korean-people
#16
Sung Hee Choi, Jung Hee Kim, Soo Lim, Jae Young Lim, Ki Woong Kim, Kyong Soo Park, Hak Chul Jang
BACKGROUND: white blood cells (WBCs) have been known to mediate the inflammatory process, which may be a pivotal mechanism for atherosclerosis and cardiovascular mortality. OBJECTIVE: we investigated which WBC subtypes increased cardiovascular mortality and explored its connection to coronary artery diseases in a prospective study among older Koreans. STUDY DESIGN AND SUBJECTS: this study was conducted from 2005 to 2011 as a part of the Korean Longitudinal Study on Health and Aging and included 439 men and 561 women over 65-year old...
December 7, 2016: Age and Ageing
https://www.readbyqxmd.com/read/27882428/progression-of-noncalcified-and-calcified-coronary-plaque-by-ct-angiography-in-sle
#17
Aisha Khan, Armin Arbab-Zadeh, Adnan N Kiani, Laurence S Magder, Michelle Petri
Premature coronary artery disease remains the major cause of late death in systemic lupus erythematosus (SLE). Coronary artery calcium (CAC) represents an advanced stage of atherosclerosis, whereas noncalcified coronary atherosclerotic plaque (NCP) typically is more prone to trigger acute coronary events. The aim of this study was to assess the stability of NCP over time and identify factors associated with changes in NCP in patients with SLE. CT coronary angiography and calcium scanning were performed at baseline and follow-up in thirty-six SLE patients...
January 2017: Rheumatology International
https://www.readbyqxmd.com/read/27867142/impact-of-plaque-type-and-side-branch-geometry-on-side-branch-compromise-after-provisional-stent-implantation-a-simulation-study
#18
Francesco Iannaccone, Claudio Chiastra, Antonios Karanasos, Francesco Migliavacca, Frank J H Gijsen, Patrick Segers, Peter Mortier, Benedict Verhegghe, Gabriele Dubini, Matthieu De Beule, Evelyn Regar, Jolanda J Wentzel
AIMS: Mechanisms of lumen compromise after provisional side-branch (SB) stenting are poorly understood. In this study we investigated the impact of bifurcation angle, plaque composition, and procedural strategy on SB compromise. METHODS AND RESULTS: Computer simulations of stent implantation were performed in Medina (1,1,1) bifurcation models. Provisional SB stenting was replicated including post-dilation after main branch stenting. Two bifurcation angles (45°,70°) and four plaque types (fully lipid, fully fibrous, lipid with half and full calcified ring distal to the carina) were tested...
November 22, 2016: EuroIntervention
https://www.readbyqxmd.com/read/27835741/plaque-progression-assessed-by-a-novel-semi-automated-quantitative-plaque-software-on-coronary-computed-tomography-angiography-between-diabetes-and-non-diabetes-patients-a-propensity-score-matching-study
#19
Rine Nakanishi, Indre Ceponiene, Kazuhiro Osawa, Yanting Luo, Mitsuru Kanisawa, Nichelle Megowan, Negin Nezarat, Sina Rahmani, Alexander Broersen, Pieter H Kitslaar, Christopher Dailing, Matthew J Budoff
BACKGROUND AND AIMS: We aimed at investigating whether diabetes is associated with progression in coronary plaque components. METHODS: We identified 142 study subjects undergoing serial coronary computed tomography angiography. The resulting propensity score was applied 1:1 to match diabetic patients to non-diabetic patients for clinical risk factors, prior coronary stenting, coronary artery calcium (CAC) score and the serial scan interval, resulting in the 71 diabetes and 71 non-diabetes patients...
December 2016: Atherosclerosis
https://www.readbyqxmd.com/read/27609368/evaluation-of-68ga-glutamate-carboxypeptidase-ii-ligand-positron-emission-tomography-for-clinical-molecular-imaging-of-atherosclerotic-plaque-neovascularization
#20
Thorsten Derlin, Johannes Thiele, Desiree Weiberg, James T Thackeray, Klaus Püschel, Hans-Jürgen Wester, Lukas Aguirre Dávila, Axel Larena-Avellaneda, Günter Daum, Frank M Bengel, Udo Schumacher
OBJECTIVE: Intraplaque neovascularization contributes to the progression and rupture of atherosclerotic lesions. Glutamate carboxypeptidase II (GCPII) is strongly expressed by endothelial cells of tumor neovasculature and plays a major role in hypoxia-induced neovascularization in rodent models of benign diseases. We hypothesized that GCPII expression may play a role in intraplaque neovascularization and may represent a target for imaging of atherosclerotic lesions. The aim of this study was to determine frequency, pattern, and clinical correlates of vessel wall uptake of a (68)Ga-GCPII ligand for positron emission tomographic imaging...
September 8, 2016: Arteriosclerosis, Thrombosis, and Vascular Biology
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