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Agatston score

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https://www.readbyqxmd.com/read/28102510/influence-of-dose-reduction-and-iterative-reconstruction-on-ct-calcium-scores-a-multi-manufacturer-dynamic-phantom-study
#1
N R van der Werf, M J Willemink, T P Willems, M J W Greuter, T Leiner
To evaluate the influence of dose reduction in combination with iterative reconstruction (IR) on coronary calcium scores (CCS) in a dynamic phantom on state-of-the-art CT systems from different manufacturers. Calcified inserts in an anthropomorphic chest phantom were translated at 20 mm/s corresponding to heart rates between 60 and 75 bpm. The inserts were scanned five times with routinely used CCS protocols at reference dose and 40 and 80% dose reduction on four high-end CT systems. Filtered back projection (FBP) and increasing levels of IR were applied...
January 19, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28073567/the-influence-of-native-aortic-valve-calcium-and-transcatheter-valve-oversize-on-the-need-for-pacemaker-implantation-after-transcatheter-aortic-valve-insertion
#2
Fu'ad Al-Azzam, Kevin L Greason, Chayakrit Krittanawong, Eric E Williamson, Christopher J McLeod, Katherine S King, Verghese Mathew
OBJECTIVE: Native aortic valve calcium and transcatheter aortic valve oversize have been reported to predict pacemaker implantation after transcatheter aortic valve insertion. We reviewed our experience to better understand the association. METHODS: We retrospectively reviewed the records of 300 patients with no prior permanent pacemaker implantation who underwent transcatheter aortic valve insertion from November 2008 to February 2015. Valve oversize was calculated using area...
November 29, 2016: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28041705/using-coronary-calcification-to-exclude-an-ischemic-etiology-for-cardiomyopathy-a-validation-study-and-systematic-review
#3
Manuja Premaratne, Mohabbat Shamsaei, Jonathan D H Chow, Tony Haddad, Fernanda Erthal, Helen Curran, Yeung Yam, Agnieszka Szczotka, Lisa Mielniczuk, George A Wells, Rob S Beanlands, Alomgir Hossain, Benjamin J W Chow
BACKGROUND: Preliminary data suggests the absence of coronary artery calcification (CAC) excludes ischemic etiologies of cardiomyopathy. We prospectively validate and perform a systematic review to determine the utility of an Agatston score=0 to exclude the diagnosis of ischemic cardiomyopathy. METHODS AND RESULTS: Patients with newly diagnosed LV dysfunction were prospectively enrolled. Patients underwent CAC imaging and were followed until an etiologic diagnosis of cardiomyopathy was made...
December 20, 2016: International Journal of Cardiology
https://www.readbyqxmd.com/read/28036114/does-statins-promote-vascular-calcification-in-chronic-kidney-disease
#4
Zhimin Chen, Abdul Rashid Qureshi, Paolo Parini, Eva Hurt-Camejo, Jonaz Ripsweden, Torkel B Brismar, Peter Barany, Armand Jaminon, Leon J Schurgers, Olof Heimburger, Bengt Lindholm, Peter Stenvinkel
BACKGROUND: In end-stage renal disease (ESRD), coronary artery calcification (CAC) and inflammation contribute to cardiovascular disease (CVD). Statins do not improve survival in ESRD patients and their effect on vascular calcification is unclear. We explored associations between CAC, inflammatory biomarkers, statins and mortality in ESRD. MATERIAL AND METHODS: In 240 ESRD patients (63% males; median age 56 years) from cohorts including 86 recipients of living donor kidney transplant (LD-Rtx), 96 incident dialysis patients and 58 prevalent peritoneal dialysis patients, associations of CAC score (Agatston Units, AUs), interleukin-6 (IL-6) with high-sensitivity C-reactive protein (hsCRP), tumour necrosis factor (TNF), use of statins and all-cause mortality were analysed...
December 30, 2016: European Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28033543/thoracic-aortic-calcium-cardiovascular-disease-events-and-all-cause-mortality-in-asymptomatic-individuals-with-zero-coronary-calcium-the-multi-ethnic-study-of-atherosclerosis-mesa
#5
Joonseok Kim, Matthew J Budoff, Khurram Nasir, Nathan D Wong, Joseph Yeboah, Mouaz H Al-Mallah, Steve Shea, Zeina A Dardari, Roger S Blumenthal, Michael J Blaha, Miguel Cainzos-Achirica
BACKGROUND AND AIMS: TAC is associated with incident CVD and all-cause mortality. Nevertheless, the independent 10-year prognostic value of TAC in individuals with CAC = 0 beyond traditional risk factors is not well established. METHODS: 3415 MESA participants with baseline CAC = 0 were followed for CHD, CVD events and all-cause mortality. TAC was measured in the ascending and descending aorta in all participants and quantified using Agatston's score. Multivariable Cox proportional hazards regression models were used to study the associations between TAC and incident CHD, CVD events and all-cause mortality...
December 10, 2016: Atherosclerosis
https://www.readbyqxmd.com/read/28007496/cardiovascular-health-metrics-among-south-asian-adults-in-the-united-states-prevalence-and-associations-with-subclinical-atherosclerosis
#6
Sameera A Talegawkar, Yichen Jin, Namratha R Kandula, Alka M Kanaya
South Asians, a fast growing ethnic group in the US, have an increased risk for cardiovascular disease compared to the general population. We examined the prevalence and distribution of the American Heart Association's Life's Simple 7 cardiovascular health (CVH) metrics using data from Mediators of Atherosclerosis in South Asians Living in America (MASALA) study, and cross-sectional associations between number of CVH metrics in the ideal range with subclinical atherosclerosis assessed using coronary artery calcium (CAC) measured using cardiac computed tomography and carotid intima media thickness (CIMT) measured using high-resolution B-mode ultrasonography...
December 20, 2016: Preventive Medicine
https://www.readbyqxmd.com/read/27986261/accuracy-and-radiation-dose-reduction-using-low-voltage-computed-tomography-coronary-artery-calcium-scoring-with-tin-filtration
#7
Christian Tesche, Carlo N De Cecco, Rozemarijn Vliegenthart, Moritz H Albrecht, Akos Varga-Szemes, Taylor M Duguay, Ullrich Ebersberger, Richard R Bayer, Christian Canstein, Bernhard Schmidt, Thomas Allmendinger, Sheldon E Litwin, Pamela B Morris, Thomas G Flohr, Ellen Hoffmann, U Joseph Schoepf
This study prospectively investigated the accuracy and radiation dose reduction of CT coronary artery calcium scoring (CACS) using a 100 kVp acquisition protocol with tin filtration (Sn100 kVp) compared with the standard 120 kVp acquisition protocol; 70 patients (59% men, 62.1 ± 10.7 years) who underwent a clinically indicated CACS acquisition using the standard 120 kVp protocol on a third-generation dual-source CT system were enrolled. An additional Sn100 kVp CACS scan was performed. Agatston scores and categories, percentile-based risk categorization, and radiation dose estimates were derived from 120 and Sn100 kVp studies and compared...
November 16, 2016: American Journal of Cardiology
https://www.readbyqxmd.com/read/27974951/automated-agatston-score-computation-in-a-large-dataset-of-non-ecg-gated-chest-computed-tomography
#8
Germán González, George R Washko, Raúl San José Estépar
The Agatston score, computed from ECG-gated computed tomography (CT), is a well established metric of coronary artery disease. It has been recently shown that the Agatston score computed from chest CT (non ECG-gated) studies is highly correlated with the Agatston score computed from cardiac CT scans. In this work we present an automated method to compute the Agatston score from chest CT images. Coronary arteries calcifications (CACs) are defined as voxels contained within the coronary arteries with a value greater or equal to 130 Hounsfield Units (HU)...
April 2016: Proceedings of the IEEE International Symposium on Biomedical Imaging: from Nano to Macro
https://www.readbyqxmd.com/read/27965940/coronary-calcification-is-reversely-related-with-bone-and-hair-calcium-the-relationship-among-different-calcium-pools-in-body
#9
Sang-Hoon Lee, Soo-Jung Park, Kyu-Nam Kim, Doo-Yeoun Cho, Young-Sang Kim, Bom-Taeck Kim
BACKGROUND: With aging, calcium efflux from bone is increased with age-related bone loss, and it can reduce bone mineral density (BMD). On the contrary, age-related calcium adoption into arterial wall progressively stiffens blood vessels. Theses process insinuates shift of calcium among different pools in body. However, their relationships have not been elucidated yet. So we investigated the correlation among calcium contents in different body pools, such as hair, bone, and blood vessels in women...
November 2016: Journal of Bone Metabolism
https://www.readbyqxmd.com/read/27936125/automatic-coronary-artery-calcium-scoring-on-radiotherapy-planning-ct-scans-of-breast-cancer-patients-reproducibility-and-association-with-traditional-cardiovascular-risk-factors
#10
Sofie A M Gernaat, Ivana Išgum, Bob D de Vos, Richard A P Takx, Danny A Young-Afat, Noor Rijnberg, Diederick E Grobbee, Yolanda van der Graaf, Pim A de Jong, Tim Leiner, Desiree H J van den Bongard, Jean-Philippe Pignol, Helena M Verkooijen
OBJECTIVES: Coronary artery calcium (CAC) is a strong and independent predictor of cardiovascular disease (CVD) risk. This study assesses reproducibility of automatic CAC scoring on radiotherapy planning computed tomography (CT) scans of breast cancer patients, and examines its association with traditional cardiovascular risk factors. METHODS: This study included 561 breast cancer patients undergoing radiotherapy between 2013 and 2015. CAC was automatically scored with an algorithm using supervised pattern recognition, expressed as Agatston scores and categorized into five categories (0, 1-10, 11-100, 101-400, >400)...
2016: PloS One
https://www.readbyqxmd.com/read/27931526/coronary-artery-calcium-scanning-the-agatston-score-and-beyond
#11
EDITORIAL
Daniel S Berman, Yoav Arnson, Alan Rozanski
No abstract text is available yet for this article.
December 2016: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/27913900/bone-mineral-density-of-extremities-is-associated-with-coronary-calcification-and-biopsy-verified-vascular-calcification-in-living-donor-renal-transplant-recipients
#12
Zhimin Chen, Jia Sun, Mathias Haarhaus, Peter Barany, Lars Wennberg, Jonaz Ripsweden, Torkel B Brismar, Bengt Lindholm, Annika Wernerson, Magnus Söderberg, Peter Stenvinkel, Abdul Rashid Qureshi
Chronic kidney disease (CKD) mineral and bone disorders (CKD-MBD) may lead to low bone mineral density (BMD) and vascular calcification (VC), but links to the latter are unclear. Here we investigated associations between BMD, coronary artery calcium (CAC) scores, and histological signs of VC in end-stage renal disease (ESRD) patients undergoing living-donor kidney transplantation (LD-Rtx). In 66 ESRD patients (median age 45 years, 68% males), BMD (by dual-energy X-ray absorptiometry, DXA), CAC score (by computed tomography, CT; n = 54), and degree of VC score (graded by histological examination of epigastric artery specimens collected at LD-Rtx; n = 55) were assessed at the time of LD-Rtx...
December 2, 2016: Journal of Bone and Mineral Metabolism
https://www.readbyqxmd.com/read/27905995/cdkn2b-methylation-is-associated-with-carotid-artery-calcification-in-ischemic-stroke-patients
#13
Shuyu Zhou, Yumeng Zhang, Li Wang, Zhizhong Zhang, Biyang Cai, Keting Liu, Hao Zhang, Minhui Dai, Lingli Sun, Xiaomeng Xu, Huan Cai, Xinfeng Liu, Guangming Lu, Gelin Xu
BACKGROUND: Cyclin-dependent kinase inhibitor 2A/2B (CDKN2A/2B) near chromosome 9p21 have been associated with both atherosclerosis and artery calcification, but the underlying mechanisms remained largely unknown. Considering that CDKN2A/2B is a frequently reported site for DNA methylation, this study aimed to evaluate whether carotid artery calcification (CarAC) is related to methylation levels of CDKN2A/2B in patients with ischemic stroke. METHODS: DNA methylation levels of CDKN2A/2B were measured in 322 ischemic stroke patients using peripheral blood leukocytes...
December 1, 2016: Journal of Translational Medicine
https://www.readbyqxmd.com/read/27903540/greater-volume-but-not-higher-density-of-abdominal-aortic-calcium-is-associated-with-increased-cardiovascular-disease-risk-mesa-multi-ethnic-study-of-atherosclerosis
#14
Nketi I Forbang, Erin D Michos, Robyn L McClelland, Rosemay A Remigio-Baker, Matthew A Allison, Veit Sandfort, Joachim H Ix, Isac Thomas, Dena E Rifkin, Michael H Criqui
BACKGROUND: Abdominal aortic calcium (AAC) and coronary artery calcium (CAC) independently and similarly predict cardiovascular disease (CVD) events. The standard AAC and CAC score, the Agatston method, upweights for greater calcium density, thereby modeling higher calcium density as a CVD hazard. METHODS AND RESULTS: Computed tomography scans were used to measure AAC and CAC volume and density in a multiethnic cohort of community-dwelling individuals, and Cox proportional hazard was used to determine their independent association with incident coronary heart disease (CHD, defined as myocardial infarction, resuscitated cardiac arrest, or CHD death), cardiovascular disease (CVD, defined as CHD plus stroke and stroke death), and all-cause mortality...
November 2016: Circulation. Cardiovascular Imaging
https://www.readbyqxmd.com/read/27900990/prognostic-value-of-gai-s-plaque-score-and-agatston-coronary-artery-calcium-score-for-functionally-significant-coronary-artery-stenosis
#15
Chuang Zhang, Shuang Yang, Lu-Yue Gai, Zhi-Qi Han, Qian Xin, Xiao-Bo Yang, Jun-Jie Yang, Qin-Hua Jin
BACKGROUND: The prognostic values of the coronary computed tomography angiography (CCTA) score for predicting future cardiovascular events have been previously demonstrated in numerous studies. However, few studies have used the rich information available from CCTA to detect functionally significant coronary lesions. We sought to compare the prognostic values of Gai's plaque score and the coronary artery calcium score (CACS) of CCTA for predicting functionally significant coronary lesions, using fractional flow reserve (FFR) as the gold standard...
2016: Chinese Medical Journal
https://www.readbyqxmd.com/read/27887791/cryptogenic-stroke-and-nonstenosing-intracranial-calcified-atherosclerosis
#16
Hooman Kamel, Gino Gialdini, Hediyeh Baradaran, Ashley E Giambrone, Babak B Navi, Michael P Lerario, James K Min, Costantino Iadecola, Ajay Gupta
OBJECTIVE: Because some cryptogenic strokes may result from large-artery atherosclerosis that goes unrecognized as it causes <50% luminal stenosis, we compared the prevalence of nonstenosing intracranial atherosclerotic plaques ipsilateral to cryptogenic cerebral infarcts versus the unaffected side using imaging biomarkers of calcium burden. METHODS: In a prospective stroke registry, we identified patients with cerebral infarction limited to the territory of one internal carotid artery (ICA)...
November 23, 2016: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/27884729/rationale-and-design-of-the-coronary-artery-calcium-consortium-a-multicenter-cohort-study
#17
Michael J Blaha, Seamus P Whelton, Mahmoud Al Rifai, Zeina A Dardari, Leslee J Shaw, Mouaz H Al-Mallah, Kuni Matsushita, John A Rumberger, Daniel S Berman, Matthew J Budoff, Michael D Miedema, Khurram Nasir
BACKGROUND: Although coronary artery calcium (CAC) has been investigated for over two decades, there is very limited data on the association of CAC with cause of death. The CAC Consortium is a large ongoing multi-center observational cohort of individuals who underwent non-contrast cardiac-gated CAC testing and systematic, prospective, long-term follow-up for mortality with ascertainment of cause of death. METHODS: Four participating institutions from three states within the US (California, Minnesota, and Ohio) have contributed individual-level patient data to the CAC Consortium (spanning years 1991-2010)...
November 11, 2016: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/27884313/normal-body-mass-index-with-central-obesity-has-increased-risk-of-coronary-artery-calcification-in-korean-patients-with-chronic-kidney-disease
#18
Mi Jung Lee, Jung Tak Park, Kyoung Sook Park, Young Eun Kwon, Seung Hyeok Han, Shin-Wook Kang, Kyu Hun Choi, Kook-Hwan Oh, Sue Kyung Park, Dong Wan Chae, Kyubeck Lee, Young-Hwan Hwang, Soo Wan Kim, Yeong Hoon Kim, Sun Woo Kang, Joongyub Lee, Curie Ahn, Tae-Hyun Yoo
In chronic kidney disease (CKD), overweight and mild obesity have shown the lowest cardiovascular (CV) risk. However, central obesity has been directly associated with CV risk in these patients. This bidirectional relationship of body mass index (BMI) and central obesity prompted us to evaluate CV risk based on a combination of BMI and waist-to-hip ratio (WHR) in nondialysis CKD patients. We included 1078 patients with CKD stage 2 through 5 (nondialysis) enrolled in a nationwide prospective cohort of Korea...
December 2016: Kidney International
https://www.readbyqxmd.com/read/27883980/progression-of-coronary-artery-calcium-in-japanese-american-men-and-white-men-in-the-era-jump-study
#19
Vasudha Ahuja, Kamal Masaki, Abhishek Vishnu, Lei Ye, Bradley Wilcox, Christina Wassel, Akira Fujiyoshi, Emma J M Barinas-Mitchell, Katsuyuki Miura, Hirotsuga Ueshima, Beatriz L Rodriguez, Daniel Edmundowicz, Akira Sekikawa
BACKGROUND: Progression of coronary artery calcium (CAC) is associated with increased risk of coronary heart disease (CHD) and is reported to be greater in whites than blacks, Hispanics, and Chinese in the US. Our objective was to compare progression of CAC between Japanese Americans and whites. METHODS: Population-based sample of 303 Japanese American men and 310 white men aged 40-49years, free of clinical cardiovascular disease at baseline, were examined for CAC at baseline (2004-2007) and follow-up (2008-2013)...
February 1, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/27882428/progression-of-noncalcified-and-calcified-coronary-plaque-by-ct-angiography-in-sle
#20
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
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