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https://www.readbyqxmd.com/read/28937491/improved-calcium-scoring-at-dual-energy-computed-tomography-angiography-using-a-high-z-contrast-element-and-novel-material-separation-technique
#1
Jack W Lambert, Yuxin Sun, Karen G Ordovas, Robert G Gould, Sizhe Wang, Benjamin M Yeh
OBJECTIVES: The aim of this study was to compare the accuracy of existing dual-energy computed tomography (CT) angiography coronary artery calcium scoring methods to those obtained using an experimental tungsten-based contrast material and a recently described contrast material extraction process (CMEP). METHODS: Phantom coronary arteries of varied diameters, with different densities and arcs of simulated calcified plaque, were sequentially filled with water, iodine, and tungsten contrast materials and scanned within a thorax phantom at rapid-kVp-switching dual-energy CT...
September 20, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28931782/tumor-necrosis-factor-%C3%AE-gene-expression-in-epicardial-adipose-tissue-is-related-to-coronary-atherosclerosis-assessed-by-computed-tomography
#2
Toshiro Kitagawa, Hideya Yamamoto, Takuya Hattori, Kazuhiro Sentani, Shinya Takahashi, Atsuhiro Senoo, Yumiko Kubo, Wataru Yasui, Taijiro Sueda, Yasuki Kihara
AIMS: Tumor necrosis factor (TNF)-α reportedly has key pro-inflammatory properties in both atherosclerosis and adipocytes. To further investigate the biologic impact of epicardial adipose tissue (EAT) on coronary atherosclerosis, we evaluated the relationship between TNF-α gene expression in EAT and clinically-assessed coronary atherosclerosis on computed tomography (CT). METHODS: We studied 47 patients before cardiac surgery (coronary artery bypass grafting [CABG], n=26; non-CABG, n=21), assessing visceral adipose tissue (VAT) area, EAT volume, coronary calcium score (CCS), and the presence of non- and/or partially-calcified coronary plaque (NCP) on CT angiography...
September 20, 2017: Journal of Atherosclerosis and Thrombosis
https://www.readbyqxmd.com/read/28929621/new-integrated-approach-to-percutaneous-mitral-valvuloplasty-combining-wilkins-score-with-commissural-calcium-score-and-commissural-area-ratio
#3
Obul Reddy Gajjala, Rajasekhar Durgaprasad, Vanajakshamma Velam, Sridhar Babu Kayala, Latheef Kasala
BACKGROUND: Present echocardiographic scoring systems for percutaneous mitral valvuloplasty (PMV) have limitations, and no scoring system is significant determinant of procedural outcome. In this study, we assess the relationship between various echocardiographic parameters and scoring systems with immediate outcomes and test an integrated approach by combining Wilkins score with other parameters. METHODS: One hundred two patients who had undergone PMV were included in this prospective observational study...
September 2017: Echocardiography
https://www.readbyqxmd.com/read/28923331/effects-of-low-density-lipoprotein-cholesterol-on-coronary-artery-calcification-progression-according-to-high-density-lipoprotein-cholesterol-levels
#4
Da Young Lee, Ji Hyun Kim, Se Eun Park, Cheol-Young Park, Ki-Won Oh, Sung-Woo Park, Eun-Jung Rhee, Won-Young Lee
BACKGROUND AND AIM: Previous studies reported that many patients are at high risk for cardiovascular disease (CVD) despite achieving recommended low-density lipoprotein cholesterol (LDL-C) levels. Therefore, we investigated whether the association between LDL-C and the risk for incident CVD differed according to high-density lipoprotein cholesterol (HDL-C) levels using coronary artery calcium score (CACS) progression as a surrogate marker for predicting CVD. METHODS: We investigated 2132 Korean men in a health screening program, in which CACS was measured at baseline and after 4 years...
April 2017: Archives of Medical Research
https://www.readbyqxmd.com/read/28917674/prognostic-value-of-risk-factors-calcium%C3%A2-score-coronary-cta-myocardial%C3%A2-perfusion-imaging-and-invasive%C3%A2-coronary-angiography-in-kidney%C3%A2-transplantation-candidates
#5
Simon Winther, My Svensson, Hanne Skou Jørgensen, Laust Dupont Rasmussen, Niels Ramsing Holm, Lars Christian Gormsen, Kirsten Bouchelouche, Hans Erik Bøtker, Per Ivarsen, Morten Bøttcher
OBJECTIVES: This study sought to perform a prospective head-to-head comparison of the predictive value of clinical risk factors and a variety of cardiac imaging modalities including coronary artery calcium score (CACS), coronary computed tomography angiography (CTA), single-photon emission computed tomography (SPECT), and invasive coronary angiography (ICA) on major adverse cardiac events (MACE) and all-cause mortality in kidney transplantation candidates. BACKGROUND: Current guidelines recommend screening for coronary artery disease in kidney transplantation candidates...
September 9, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28916890/coronary-calcium-score-influences-referral-for-invasive-coronary-angiography-after-normal-myocardial-perfusion-spect
#6
Shu Yokota, Mohamed Mouden, Jan Paul Ottervanger, Elsemiek Engbers, Pieter L Jager, Jorik R Timmer, Siert Knollema
BACKGROUND: In patients with normal SPECT but persistent complaints, invasive angiography may exclude obstructive coronary disease. We assessed whether high coronary artery calcium (CAC) scores are associated with increased referral for invasive angiography following normal SPECT. METHODS AND RESULTS: 2286 consecutive patients (mean age 60 ± 12, 39% male) with normal SPECT were assessed. All patients underwent simultaneous CAC scoring. Patients were categorized into four groups based on their CAC score: CAC = 0 (n = 694), CAC 1 to 100 (n = 891), CAC 101 to 400 (n = 368), and CAC >400 (n = 333)...
September 15, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28916241/relationship-of-echocardiographic-epicardial-fat-thickness-and-epicardial-fat-volume-by-computed-tomography-with-coronary-artery-calcification-data-from-the-caesar-study
#7
Byung Jin Kim, Jung Gyu Kang, Sung Ho Lee, Jong Young Lee, Ki Chul Sung, Bum Soo Kim, Jin Ho Kang
BACKGROUND AND AIMS: No study has assessed the association between echocardiographic epicardial fat thickness (EFT) and computed tomography (CT)-based epicardial fat volume (EFV) and coronary artery calcification. The aim of this study is to evaluate the association between EFT and EFV and coronary artery calcification. METHODS: Among the 2,299 individuals enrolled in the CArdiometabolic risk, Epicardial fat, and Subclinical Atherosclerosis Registry (CAESAR) study, 2,276 (1,851 men; mean age 45 ± 8...
September 12, 2017: Archives of Medical Research
https://www.readbyqxmd.com/read/28901232/decellularized-allografts-for-right-ventricular-outflow-tract-reconstruction-in-children
#8
Francisco Diniz Affonso da Costa, Jonathan R G Etnel, Renato Torres, Eduardo M Balbi Filho, Rafael Torres, Allyson Calixto, Leonardo A Mulinari
OBJECTIVE: Determine the midterm outcomes of decellularized allografts for right ventricular outflow tract (RVOT) reconstruction in children less than 12 years of age. METHODS: The study included all consecutive patients submitted to RVOT reconstruction with decellularized allografts between June 2006 and June 2016. Besides clinical and echocardiographic control, 20 patients with more than five years of follow-up were evaluated with computed tomography (CT) scans to determine allograft diameters and calcium scores...
September 2017: World Journal for Pediatric & Congenital Heart Surgery
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/28895189/-diagnosis-of-a-hiatal-hernia-from-a-ct-coronary-artery-calcium-scan
#10
Edmund Kenneth Kerut, John T Balart
Identification of a hiatal hernia by computed tomography (CT) scanning, and particularly with axial imaging from a coronary artery calcium score exam, is often subjective. There are several CT features that are diagnostic or at least suggestive of a hiatal hernia. As a hiatal hernia may be the etiology of a chest pain syndrome, it is important to be aware of CT findings suggestive of such.
September 12, 2017: Echocardiography
https://www.readbyqxmd.com/read/28892753/the-risk-of-coronary-artery-disease-estimated-non-invasively-in-patients-with-essential-hypertension-environmentally-exposed-to-cigarette-smoke
#11
Paweł Gać, Przemysław Jaźwiec, Małgorzata Poręba, Grzegorz Mazur, Krystyna Pawlas, Małgorzata Sobieszczańska, Rafał Poręba
BACKGROUND: The relationship between environmental exposure of non-smokers to cigarette smoke and the coronary artery calcium scores has not been sufficiently documented. The aim of the study was to identify the relationship between environmental exposure to cigarette smoke and the risk of coronary artery disease (CAD) estimated non-invasively through measurement of coronary artery calcium score by computed tomography in patients with essential hypertension. MATERIAL AND METHODS: The study was conducted on 67 patients with essential hypertension, non-smokers environmentally exposed to cigarette smoke (group A) and on 67 patients with essential hypertension, non-smokers not exposed to cigarette smoke (group B), selected using the case to case...
September 1, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28871240/in-vivo-and-in-vitro-analysis-in-coronary-artery-disease-related-to-type-2-diabetes
#12
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/28867375/calcified-plaque-modification-alters-local-drug-delivery-in-the-treatment-of-peripheral-atherosclerosis
#13
Abraham R Tzafriri, Fernando Garcia-Polite, Brett Zani, James Stanley, Benny Muraj, Jennifer Knutson, Robert Kohler, Peter Markham, Alexander Nikanorov, Elazer R Edelman
BACKGROUND: Calcific atherosclerosis is a major challenge to intraluminal drug delivery in peripheral artery disease (PAD). OBJECTIVES: We evaluated the effects of orbital atherectomy on intraluminal paclitaxel delivery to human peripheral arteries with substantial calcified plaque. METHODS: Diagnostic angiography and 3-D rotational imaging of five fresh human lower limbs revealed calcification in all main arteries. The proximal or distal segment of each artery was treated using an orbital atherectomy system (OAS) under simulated blood flow and fluoroscopy...
September 1, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28867263/effects-of-hyperthyroidism-on-coronary-artery-disease-a%C3%A2-computed-tomography-angiography-study
#14
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
https://www.readbyqxmd.com/read/28864316/relation-of-diastolic-blood-pressure-and-coronary-artery-calcium-to-coronary-events-and-outcomes-from-the-multi-ethnic-study-of-atherosclerosis
#15
Faisal Rahman, Mahmoud Al Rifai, Michael J Blaha, Khurram Nasir, Matthew J Budoff, Bruce M Psaty, Wendy S Post, Roger S Blumenthal, John W McEvoy
Diastolic blood pressure has a J-curve relation with coronary heart disease and death. Because this association is thought to reflect reduced coronary perfusion at low diastolic blood pressure, we hypothesized that the J-curve would be most pronounced in persons with coronary artery calcium. In 6,811 participants from the Multi-Ethnic Study of Atherosclerosis, we used Cox models to examine if diastolic blood pressure category is associated with coronary heart disease events, stroke, and mortality. Analyses were conducted in the sample overall and after stratification by coronary artery calcium score...
August 8, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28860220/interleukin-18-enhances-vascular-calcification-and-osteogenic-differentiation-of-vascular-smooth-muscle-cells-through-trpm7-activation
#16
Kun Zhang, Yinyin Zhang, Weijing Feng, Renhua Chen, Jie Chen, Rhian M Touyz, Jingfeng Wang, Hui Huang
OBJECTIVE: Vascular calcification (VC) is an important predictor of cardiovascular morbidity and mortality. Osteogenic differentiation of vascular smooth muscle cells (VSMCs) is a key mechanism of VC. Recent studies show that IL-18 (interleukin-18) favors VC while TRPM7 (transient receptor potential melastatin 7) channel upregulation inhibits VC. However, the relationship between IL-18 and TRPM7 is unclear. We questioned whether IL-18 enhances VC and osteogenic differentiation of VSMCs through TRPM7 channel activation...
August 31, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28833626/cardiac-imaging-to-detect-coronary-artery-disease-in-athletes-aged-35-years-and-older-a-scoping-review
#17
Thijs L Braber, Johannes B Reitsma, Arend Mosterd, Martin J Willemink, Niek H J Prakken, Martin Halle, Sanjay Sharma, Birgitta K Velthuis
Sudden cardiac death (SCD) is a devastating event in athletes. Screening efforts that were first directed at athletes younger than 35 years, are now focusing on the rapidly growing group of older sportspersons. Athletes aged ≥35 years have a 10-fold increased risk of exercise-related cardiac arrest, mostly due to coronary artery disease (CAD). Although cardiac imaging is pivotal in identifying CAD, the role of imaging modalities in screening asymptomatic older sportspersons remains unclear. We performed a scoping review to identify the role of cardiac imaging to detect CAD in older sportspersons and to identify gaps in the existing literature...
August 23, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28832417/2016-scct-str-guidelines-for-coronary-artery-calcium-scoring-of-noncontrast-noncardiac-chest-ct-scans-a-report-of-the-society-of-cardiovascular-computed-tomography-and-society-of-thoracic-radiology
#18
Harvey S Hecht, Paul Cronin, Michael J Blaha, Matthew J Budoff, Ella A Kazerooni, Jagat Narula, David Yankelevitz, Suhny Abbara
The Society of Cardiovascular Computed Tomography (SCCT) and the Society of Thoracic Radiology (STR) have jointly produced this document. Experts in this subject have been selected from both organizations to examine subject-specific data and write this guideline in partnership. A formal literature review, weighing the strength of evidence has been performed. When available, information from studies on cost was considered. Computed tomography (CT) acquisition, CAC scoring methodologies and clinical outcomes are the primary basis for the recommendations in this guideline...
September 2017: Journal of Thoracic Imaging
https://www.readbyqxmd.com/read/28830786/relation-between-serum-levels-of-chemotaxis-related-factors-and-the-presence-of-coronary-artery-calcification-as-expression-of-subclinical-atherosclerosis
#19
Juan Carlos Muñoz, Rubén Martín, Carmen Alonso, Beatriz Gutiérrez, María Luisa Nieto
BACKGROUND: Atherosclerotic plaque formation is characterized by recruitment of monocytes/macrophages, which contributes to its calcification by releasing pro-osteogenic cytokines. Chemotaxis-related proteins, including netrin-1, gremlin-1 and macrophage inflammatory protein-1β (MIP-1β), regulate immune cell migration. However, their relation with the presence of subclinical atherosclerosis, assessed by measures of coronary artery calcifications (CAC) in patients without known coronary artery disease (CAD), remains unclear...
August 19, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28808885/the-association-of-epicardial-fat-volume-with-coronary-characteristics-and-clinical-outcome
#20
Kohichiro Iwasaki, Norio Urabe, Atsushi Kitagawa, Toshihiko Nagao
Recent studies have demonstrated the relationship between epicardial fat volume (EFV) and coronary atherosclerosis, but their association is modest at best. Our purpose is to elucidate the association of epicardial fat with coronary characteristics and clinical outcome. We performed coronary computed tomographic angiography in 651 patients and divided them into three groups according to tertiles of EFV; low-tertile (n = 215), 36-123 ml; middle-tertile (n = 218), 124-165 ml; high-tertile (n = 218), 166-489 ml...
August 14, 2017: International Journal of Cardiovascular Imaging
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