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Cardiovascular tomography

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https://www.readbyqxmd.com/read/28923845/high-sensitivity-cardiac-troponin-i-as-a-gatekeeper-for-coronary-computed-tomography-angiography-and-stress-testing-in-patients-with-acute-chest-pain
#1
Maros Ferencik, Thomas Mayrhofer, Michael T Lu, Pamela K Woodard, Quynh A Truong, W Frank Peacock, Fabian Bamberg, Benjamin C Sun, Jerome L Fleg, John T Nagurney, James E Udelson, Wolfgang Koenig, James L Januzzi, Udo Hoffmann
BACKGROUND: Most patients presenting to the emergency department (ED) with suspected acute coronary syndrome (ACS) undergo noninvasive cardiac testing with a low diagnostic yield. We determined whether a combination of high-sensitivity cardiac troponin I (hs-cTnI) and cardiovascular risk factors might improve selection of patients for cardiac testing. METHODS: We included patients from the Rule Out Myocardial Infarction/Ischemia Using Computer Assisted Tomography (ROMICAT) I and II trials who presented to the ED with acute chest pain and were referred for cardiac testing...
September 18, 2017: Clinical Chemistry
https://www.readbyqxmd.com/read/28922364/association-of-epicardial-adipose-tissue-with-serum-level-of-cystatin-c-in-type-2-diabetes
#2
Tomomi Murai, Noriko Takebe, Kan Nagasawa, Yusuke Todate, Riyuki Nakagawa, Rieko Nakano, Mari Hangai, Yutaka Hasegawa, Yoshihiko Takahashi, Kunihiro Yoshioka, Yasushi Ishigaki
OBJECTIVE: Accumulation of epicardial adipose tissue (EAT) is considered to be a cardiovascular risk factor independent from visceral adiposity, obesity, hypertension and diabetes. We explored the parameters related to EAT accumulation, aiming to clarify the novel pathophysiological roles of EAT in subjects with type 2 diabetes (T2DM). METHODS: We examined the laboratory values, including cystatinC, and surrogate markers used for evaluating atherosclerosis. EAT was measured as the sum of the adipose tissue area, obtained by plain computed tomography scans in 208 subjects with T2DM but no history of coronary artery disease...
2017: PloS One
https://www.readbyqxmd.com/read/28917157/density-of-calcium-in-the-ascending-thoracic-aorta-and-risk-of-incident-cardiovascular-disease-events
#3
Isac C Thomas, Robyn L McClelland, Erin D Michos, Matthew A Allison, Nketi I Forbang, W T Longstreth, Wendy S Post, Nathan D Wong, Matthew J Budoff, Michael H Criqui
BACKGROUND AND AIMS: The volume and density of coronary artery calcium (CAC) both independently predict cardiovascular disease (CVD) beyond standard risk factors, with CAC density inversely associated with incident CVD after accounting for CAC volume. We tested the hypothesis that ascending thoracic aorta calcium (ATAC) volume and density predict incident CVD events independently of CAC. METHODS: The Multi-Ethnic Study of Atherosclerosis (MESA) is a prospective cohort study of participants without clinical CVD at baseline...
September 7, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28916148/chemokine-receptor-directed-imaging-and-therapy
#4
REVIEW
Andreas K Buck, Antje Stolzenburg, Heribert Hänscheid, Andreas Schirbel, Katharina Lückerath, Margret Schottelius, Hans-Jürgen Wester, Constantin Lapa
The C - X - C chemokine receptor 4 (CXCR4) and its natural ligand CXCL12 are key factors in the process of cell migration, homing of hematopoietic stem cells to the bone marrow, and represent important mediators of angiogenesis and cell proliferation. The CXCR4/CXCL12 interplay can be disrupted by CXCR4 antagonists such as Plerixafor which are already in daily clinical use, i.e. for mobilization and subsequent harvesting of hematopoietic progenitor cells and stem cell transplantation. In a pathological condition, involvement in the process of metastasis and homing of cancer cells to a protective niche has been described, making CXCR4 an attractive target for imaging and treatment of malignant diseases...
September 12, 2017: Methods: a Companion to Methods in Enzymology
https://www.readbyqxmd.com/read/28914973/comparison-of-mid-to-long-term-clinical-outcomes-between-anatomical-testing-and-usual-care-in-patients-with-suspected-coronary-artery-disease-a-meta-analysis-of-randomized-trials
#5
In-Chang Hwang, Sol Ji Choi, Ji Eun Choi, Eun-Bi Ko, Jae Kyung Suh, Insun Choi, Hyun-Jae Kang, Yong-Jin Kim, Joo Youn Kim
BACKGROUND: Controversies remain regarding clinical outcomes following initial strategies of coronary computed tomography angiography (CCTA) vs usual care with functional testing in patients with suspected coronary artery disease (CAD). HYPOTHESIS: CCTA as initial diagnostic strategy results in better mid- to long-term outcomes than usual care in patients with suspected CAD. METHODS: We searched PubMed, Embase, and Cochrane Library for randomized controlled trials comparing clinical outcomes during ≥6 months' follow-up between initial anatomical testing by CCTA vs usual care with functional testing in patients with suspected CAD...
September 15, 2017: Clinical Cardiology
https://www.readbyqxmd.com/read/28913626/role-of-18-f-fdg-pet-ct-in-the-diagnosis-of-cardiovascular-implantable-electronic-device-infections-a-meta-analysis
#6
Maryam Mahmood, Ayse Tuba Kendi, Saira Farid, Saira Ajmal, Geoffrey B Johnson, Larry M Baddour, Panithaya Chareonthaitawee, Paul A Friedman, M Rizwan Sohail
OBJECTIVE: We performed a meta-analysis evaluating the use of fluorine-18-fluorodeoxyglucose ((18)F-FDG) positron-emission tomography (PET)/computed tomography (CT) in the diagnosis of cardiovascular implantable electronic device (CIED) infections. BACKGROUND: PET/CT may be helpful in the diagnosis of CIED infection, particularly in patients with the absence of localizing signs or definitive echocardiographic findings. METHODS: PubMed, Embase, Cochrane library, CINAHL, Web of Knowledge, and www...
September 14, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28912188/modern-imaging-techniques-in-cardiomyopathies
#7
REVIEW
M Fuad Jan, A Jamil Tajik
Modern advanced imaging techniques have allowed increasingly more rigorous assessment of the cardiac structure and function of several types of cardiomyopathies. In contemporary cardiology practice, echocardiography and cardiac magnetic resonance imaging are widely used to provide a basic framework in the evaluation and management of cardiomyopathies. Echocardiography is the quintessential imaging technique owing to its unique ability to provide real-time images of the beating heart with good temporal resolution, combined with its noninvasive nature, cost-effectiveness, availability, and portability...
September 15, 2017: Circulation Research
https://www.readbyqxmd.com/read/28899908/activation-of-the-splenocardiac-axis-by-electronic-and-tobacco-cigarettes-in-otherwise-healthy-young-adults
#8
Zachary Boas, Pawan Gupta, Roya S Moheimani, May Bhetraratana, Fen Yin, Kacey M Peters, Jeffrey Gornbein, Jesus A Araujo, Johannes Czernin, Holly R Middlekauff
The "Splenocardiac Axis" describes an inflammatory signaling network underlying acute cardiac ischemia, characterized by sympathetic nerve stimulation of hematopoietic tissues, such as the bone marrow and spleen, which then release proinflammatory monocytes that populate atherosclerotic plaques, thereby promoting ischemic heart disease. Electronic (e) cigarettes, like tobacco cigarettes trigger sympathetic nerve activation, but virtually nothing is known about their influence on hematopoietic and vascular tissues and cardiovascular risks...
September 2017: Physiological Reports
https://www.readbyqxmd.com/read/28899385/coronary-artery-calcium-score-plays-an-important-role-for-cardiovascular-risk-stratification-in-the-statin-benefit-groups-of-asymptomatic-individuals
#9
Dong-Hyeon Lee, Ho-Joong Youn, Hae-Ok Jung, Kiyuk Chang, Yun-Seok Choi, Jung Im Jung
BACKGROUND: The purpose of this study was to describe and analyze the relationship between statin benefit groups based on statin-intensity class of drugs and coronary artery calcium score (CACS) using multidetector computed tomography (MDCT) in an asymptomatic Korean population. METHODS: A total of 3914 asymptomatic individuals (mean age: 55 ± 10 years; male: female = 2649: 1265) who underwent MDCT for health examination between January 2009 and December 2012 were retrospectively enrolled...
September 12, 2017: Lipids in Health and Disease
https://www.readbyqxmd.com/read/28893088/double-locus-lymphoplasmacytic-aortitis
#10
Szabolcs Miskolczi, Mary N Sheppard, Gábor Bogáts, Laszlo Göbölös
Thoracic aortic aneurysm is an indication for major cardiovascular operative procedures. The etiology is usually hypertension and/or atherosclerotic disease; reaching a certain diameter often results in acute aortic syndrome. Immunoglobulin G4-related aortitis, characterized by lymphoplasmacytic vascular tunica media induration without well-defined underlying infectious or autoimmune systemic causes, is uncommon. Histological similarity to immunoglobulin G4 disease in other organs suggests that this aortitis might be a manifestation of systemic pathology...
January 1, 2017: Asian Cardiovascular & Thoracic Annals
https://www.readbyqxmd.com/read/28882238/unraveling-vascular-inflammation-from-immunology-to-imaging
#11
REVIEW
Heather L Teague, Mark A Ahlman, Abass Alavi, Denisa D Wagner, Andrew H Lichtman, Matthias Nahrendorf, Filip K Swirski, Frank Nestle, Joel M Gelfand, Mariana J Kaplan, Steven Grinspoon, Paul M Ridker, David E Newby, Ahmed Tawakol, Zahi A Fayad, Nehal N Mehta
Inflammation is a critical factor in early atherosclerosis and its progression to myocardial infarction. The search for valid surrogate markers of arterial vascular inflammation led to the increasing use of positron emission tomography/computed tomography. Indeed, vascular inflammation is associated with future risk for myocardial infarction and can be modulated with short-term therapies, such as statins, that mitigate cardiovascular risk. However, to better understand vascular inflammation and its mechanisms, a panel was recently convened of world experts in immunology, human translational research, and positron emission tomographic vascular imaging...
September 12, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28881141/elongated-plant-virus-based-nanoparticles-for-enhanced-delivery-of-thrombolytic-therapies
#12
Andrzej Stanislaw Pitek, Yunmei Wang, Sahil Gulati, Huiyun Gao, Phoebe L Stewart, Daniel I Simon, Nicole F Steinmetz
Thrombotic cardiovascular disease, including acute myocardial infarction, ischemic stroke, and venous thromboembolic disease, is the leading cause of morbidity and mortality worldwide. While reperfusion therapy with thrombolytic agents reduces mortality from acute myocardial infarction and disability from stroke, thrombolysis is generally less effective than mechanical reperfusion and is associated with fatal intra-cerebral hemorrhage in up to 2-4% of patients. To address these limitations, we propose the tobacco mosaic virus (TMV)-based platform technology for targeted delivery of thrombolytic therapies...
September 7, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28877068/mc225-a-novel-probe-for-p-glycoprotein-pet-imaging-at-the-blood-brain-barrier-in-vitro-cardiovascular-safety-evaluation
#13
Fabio Fusi, Miriam Durante, Beatrice Gorelli, Maria Grazia Perrone, Colabufo Nicola Antonio, Simona Saponara
The P-glycoprotein (P-gp) substrate MC225, at concentrations ≤ 10 nM, is a valuable radiotracer for positron emission tomography (PET) imaging of P-gp function in rats and mice.The aim of this study was to evaluate its potential toxic hazard towards the cardiovascular system through an in-depth analysis of its effects on rat aorta rings, on CaV1.2 channel current (ICa1.2) of A7r5 cells and on Langendorff perfused rat heart.In aortic rings, MC225 relaxed phenylephrine-induced contraction in a concentration-dependent and endothelium-independent manner, with an IC50 value of about 1 µM...
September 1, 2017: Journal of Cardiovascular Pharmacology
https://www.readbyqxmd.com/read/28874743/automated-analysis-of-liver-fat-muscle-and-adipose-tissue-distribution-from-ct-suitable-for-large-scale-studies
#14
Joel Kullberg, Anders Hedström, John Brandberg, Robin Strand, Lars Johansson, Göran Bergström, Håkan Ahlström
Computed Tomography (CT) allows detailed studies of body composition and its association with metabolic and cardiovascular disease. The purpose of this work was to develop and validate automated and manual image processing techniques for detailed and efficient analysis of body composition from CT data. The study comprised 107 subjects examined in the Swedish CArdioPulmonary BioImage Study (SCAPIS) using a 3-slice CT protocol covering liver, abdomen, and thighs. Algorithms were developed for automated assessment of liver attenuation, visceral (VAT) and subcutaneous (SAT) abdominal adipose tissue, thigh muscles, subcutaneous, subfascial (SFAT) and intermuscular adipose tissue...
September 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28871240/in-vivo-and-in-vitro-analysis-in-coronary-artery-disease-related-to-type-2-diabetes
#15
Teresa Infante, Ernesto Forte, Marco Aiello, Marco Salvatore, Carlo Cavaliere
AIM: The leading cause of morbidity and mortality in patients with type 2 diabetes mellitus (DM) is coronary artery disease (CAD), a condition often asymptomatic but severe in these patients. Although glucose metabolism impairment and oxidative stress are known actors in the endothelial dysfunction/remodeling that occurs in diabetic patients, the relationship between cardiovascular disorders and DM is not fully understood. We have performed both an in vivo imaging and in vitro molecular analysis to investigate diabetic-specific CAD alterations...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28870682/association-of-arterial-calcification-with-chronic-limb-ischemia-in-patients-with-peripheral-artery-disease
#16
Sara L Zettervall, Andre P Marshall, Paul Fleser, Raul J Guzman
OBJECTIVE: Arterial calcification is associated with an increased risk of limb events, including amputation. The association between calcification in lower extremity arteries and the severity of ischemia, however, has not been assessed. We thus sought to determine whether the extent of peripheral artery calcification (PAC) was correlated with Rutherford chronic ischemia categories and hypothesized that it could independently contribute to worsening limb status. METHODS: We retrospectively reviewed all patients presenting with symptomatic peripheral artery disease who underwent evaluation by contrast and noncontrast computed tomography scan of the lower extremities as part of their assessment...
September 1, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28870679/acc-aats-aha-ase-asnc-hrs-scai-scct-scmr-sts-2017-appropriate-use-criteria-for-multimodality-imaging-in-valvular%C3%A2-heart-disease-a-report-of-the-american-college-of-cardiology-appropriate-use-criteria-task-force-american-association-for-thoracic-surgery-american
#17
https://www.readbyqxmd.com/read/28867681/effect-of-intensive-and-standard-pitavastatin-treatment-with-or-without-eicosapentaenoic-acid-on-progression-of-coronary-artery-calcification-over-12-months%C3%A3-prospective-multicenter-study
#18
Toru Miyoshi, Kunihisa Kohno, Hirohiko Asonuma, Satoru Sakuragi, Makoto Nakahama, Yusuke Kawai, Tadahisa Uesugi, Takefumi Oka, Mitsuru Munemasa, Natsuki Takahashi, Naoki Mukohara, Seiji Habara, Yasushi Koyama, Kazufumi Nakamura, Hiroshi Ito
BACKGROUND: The effect of lipid-lowering agents on progression of coronary artery calcification (CAC) remains unclear. We evaluated the effects of pitavastatin 2 mg/day (PIT2), pitavastatin 4 mg/day (PIT4), and PIT2 combined with eicosapentaenoic acid (PIT2+EPA) on CAC progression.Methods and Results:This prospective multicenter study in Japan included patients with an Agatston score of 1-999, hypercholesterolemia, and no evidence of cardiovascular disease. Patients were allocated into PIT2, PIT4, or PIT2+EPA groups...
September 1, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28867495/healthcare-policy-statement-on-the-utility-of-coronary-computed-tomography-for-evaluation-of-cardiovascular-conditions-and-preventive-healthcare-from-the-health-policy-working-group-of-the-society-of-cardiovascular-computed-tomography
#19
Ahmad M Slim, Scott Jerome, Ron Blankstein, Wm Guy Weigold, Amit R Patel, Dinesh K Kalra, Ryan Miller, Kelley Branch, Mark G Rabbat, Harvey Hecht, Edward D Nicol, Todd C Villines, Leslee J Shaw
The rising cost of healthcare is prompting numerous policy and advocacy discussions regarding strategies for constraining growth and creating a more efficient and effective healthcare system. Cardiovascular imaging is central to the care of patients at risk of, and living with, heart disease. Estimates are that utilization of cardiovascular imaging exceeds 20 million studies per year. The Society of Cardiovascular CT (SCCT), alongside Rush University Medical Center, and in collaboration with government agencies, regional payers, and industry healthcare experts met in November 2016 in Chicago, IL to evaluate obstacles and hurdles facing the cardiovascular imaging community and how they can contribute to efficacy while maintaining or even improving outcomes and quality...
August 31, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28867263/effects-of-hyperthyroidism-on-coronary-artery-disease-a%C3%A2-computed-tomography-angiography-study
#20
Christoph Beyer, Fabian Plank, Guy Friedrich, Matthias Wildauer, Gudrun Feuchtner
BACKGROUND: Changes in thyroid hormone concentration can negatively affect the cardiovascular system. Subclinical hyperthyroidism has been linked to an increase of cardiovascular heart disease, however, clinical effects and significance are still uncertain. Therefore, we analyzed coronary computed tomography angiographies of patients with overt and subclinical hyperthyroidism for quantitative parameters and plaque morphology. METHODS: Seven hundred forty-four (47...
July 17, 2017: Canadian Journal of Cardiology
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