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https://www.readbyqxmd.com/read/29310329/impact-of-iterative-reconstruction-vs-filtered-back-projection-on-image-quality-in-320-slice-ct-coronary-angiography-insights-from-the-core320-multicenter-study
#1
Ahmed Fareed, Andrea L Vavere, Elke Zimmermann, Yutaka Tanami, Chloe Steveson, Matthew Matheson, Narinder Paul, Melvin Clouse, Christopher Cox, João A C Lima, Armin Arbab-Zadeh
Iterative reconstruction has been shown to reduce image noise compared with traditional filtered back projection with quantum denoising software (FBP/QDS+) in CT imaging but few comparisons have been made in the same patients without the influence of interindividual factors. The objective of this study was to investigate the impact of adaptive iterative dose reduction in 3-dimensional (AIDR 3D) and FBP/QDS+-based image reconstruction on image quality in the same patients.We randomly selected 100 patients enrolled in the coronary evaluation using 320-slice CT study who underwent CT coronary angiography using prospectively electrocardiogram triggered image acquisition with a 320-detector scanner...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29291201/sickle-cell-and-alpha-thalassemia-traits-resulting-in-non-atherosclerotic-myocardial-infarction-beyond-coincidence
#2
Lee S Nguyen, Alban Redheuil, Olivier Mangin, Joe-Elie Salem
Alpha-thalassemia trait and sickle trait are not commonly considered risk factors of ischemic heart disease. We report the case of a non-atherosclerotic silent myocardial infarction in a 46-year-old woman, carrier of the alpha-thalassemia trait (homozygous deletion of locus -3.7) combined with sickle cell trait. While the patient was included as healthy volunteer for a metabolic study, we performed cardiac magnetic resonance imagery showing a left ventricle apicolateral myocardial infarction. Coronary computed tomography angiography showed normal coronary arteries with a coronary calcium score of 0...
December 16, 2017: World Journal of Clinical Cases
https://www.readbyqxmd.com/read/29285727/influence-of-heart-rate-on-coronary-calcium-scores-a-multi-manufacturer-phantom-study
#3
N R van der Werf, M J Willemink, T P Willems, R Vliegenthart, M J W Greuter, T Leiner
To evaluate the influence of heart rate on coronary calcium scores (CCS) using a dynamic phantom on four high-end computed tomography (CT) systems from different manufacturers. Artificial coronary arteries were moved in an anthropomorphic chest phantom at linear velocities, corresponding to < 60, 60-75 and > 75 beats per minute (bpm). Data was acquired with routinely used clinical protocols for CCS on four high-end CT systems (CT1-CT4). CCS, quantified as Agatston and mass scores were compared to reference scores at < 60 bpm...
December 28, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/29285725/influence-of-iterative-reconstruction-on-coronary-calcium-scores-at-multiple-heart-rates-a-multivendor-phantom-study-on-state-of-the-art-ct-systems
#4
N R van der Werf, M J Willemink, T P Willems, M J W Greuter, T Leiner
The objective of this study was to evaluate the influence of iterative reconstruction on coronary calcium scores (CCS) at different heart rates for four state-of-the-art CT systems. Within an anthropomorphic chest phantom, artificial coronary arteries were translated in a water-filled compartment. The arteries contained three different calcifications with low (38 mg), medium (80 mg) and high (157 mg) mass. Linear velocities were applied, corresponding to heart rates of 0, < 60, 60-75 and > 75 bpm...
December 28, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/29279796/calcification-in-original-plaque-and-restenosis-following-carotid-artery-stenting
#5
Hiroyuki Katano, Yusuke Nishikawa, Hiroshi Yamada, Mitsuhito Mase
Background: The relationship between calcification in primary plaque and recurrent stenosis after carotid artery stenting (CAS) is not established, but an inverse association with restenosis following carotid endarterectomy (CEA) has been suggested. Methods: We retrospectively analyzed 75 plaques of 109 consecutive CAS with regard to calcification, using the calcium score and shape, location, and other characteristics of original plaques together with stenting-related factors...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/29273883/calcification-of-the-iliac-arteries-a-marker-for-leakage-risk-in-rectal-anastomosis-a-blinded-clinical-trial
#6
Julius Pochhammer, Fridolin Tröster, Gunnar Blumenstock, Julienne Closset, Stefanie Lang, Marie-Pascale Weller, Michael Schäffer
PURPOSE: Anastomotic leakage (AL) is associated with increased morbidity and mortality after colorectal surgery. Calcification of the arteries has been identified as a risk factor for cardiovascular events and can be reliably measured on computed tomography using software assistance. The aim of this prospective study was to prove the value of calcium scoring of the iliac arteries as a predictor of AL after rectal anastomosis. METHODS: Consecutive patients who underwent colorectal resection with rectal anastomosis were analyzed...
December 22, 2017: International Journal of Colorectal Disease
https://www.readbyqxmd.com/read/29260893/accuracy-of-coronary-artery-calcium-scoring-with-tube-current-reduction-by-75-using-an-adaptive-iterative-reconstruction-algorithm
#7
Reny Luhur, Joanne D Schuijf, Jügen Mews, Jörg Blobel, Bernd Hamm, Alexander Lembcke
OBJECTIVE: To assess the accuracy of an iterative reconstruction (IR) technique for coronary artery calcium scoring with reduced radiation dose. METHODS: 163 consecutive patients underwent twofold scanning by 320-row detector computed tomography (CT) at 120 kVp. A low-dose scan at 25% tube current but with standard scan length (14 cm) was followed by a standard dose scan with routine tube current but reduced scan length (10 cm). Reduced dose images were constructed using filtered back-projection (FBP) and IR (adaptive iterative dose reduction in 3 dimensions, or AIDR3D)...
December 20, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/29249441/ultrasound-based-aortic-valve-calcium-scoring-method-are-we-ready-to-use-it
#8
EDITORIAL
Eustachio Agricola, Stefano Stella
No abstract text is available yet for this article.
February 1, 2018: International Journal of Cardiology
https://www.readbyqxmd.com/read/29247160/the-proper-use-of-coronary-calcium-score-and-coronary-computed-tomography-angiography-for-screening-asymptomatic-patients-with-cardiovascular-risk-factors
#9
Shee Yen Tay, Po-Yen Chang, Wilson T Lao, Ying Chin Lin, Yi-Han Chung, Wing P Chan
Early detection and treatment of coronary artery disease (CAD) can reduce incidences of acute myocardial infarction. In this study, we determined the proper use of contributing risk factors and coronary artery calcium score (CACS) when screening asymptomatic patients with coronary arterial stenoses using coronary computed tomography angiography (CCTA). We reviewed 934 consecutive patients who received CACS and CCTA between December 2013 and November 2016. At least one cardiovascular disease risk factor was present in each of the 509 asymptomatic participants...
December 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29239051/coronary-and-carotid-atherosclerosis-in-asymptomatic-male-marathon-runners
#10
Christof Burgstahler, Hans Cipowicz, Christoph Thomas, Christoph Schabel, Stefanie Mangold, Dominik Ketelsen, Claus D Claussen, Andreas M Niess, Ilias Tsiflikas
The aim of the study was to evaluate the diagnostic accuracy of carotid ultrasound (CU) to predict coronary atherosclerosis in asymptomatic male marathon runners. A total of 49 male marathon runners older than 45 years(mean age 53.3±7.2 years, range 45-74 years) received CU and cardiac CT angiography(CTA) including calcium scoring(CS). Results of CU and CTA were classified binary: 1. Absence of atherosclerosis and 2. presence of atherosclerosis. The extend of atherosclerosis was not primary end-point of the study...
December 14, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29233634/epicardial-adipose-tissue-density-and-volume-are-related-to-subclinical-atherosclerosis-inflammation-and-major-adverse-cardiac-events-in-asymptomatic-subjects
#11
Markus Goeller, Stephan Achenbach, Mohamed Marwan, Mhairi K Doris, Sebastien Cadet, Frederic Commandeur, Xi Chen, Piotr J Slomka, Heidi Gransar, J Jane Cao, Nathan D Wong, Moritz H Albrecht, Alan Rozanski, Balaji K Tamarappoo, Daniel S Berman, Damini Dey
BACKGROUND: We investigated whether epicardial adipose tissue (EAT) volume and density are related to early atherosclerosis, plaque inflammation and major adverse cardiac events (MACE, cardiac death and myocardial infarction) in asymptomatic subjects. METHODS: EAT volume and density were quantified from non-contrast cardiac CT in 456 asymptomatic individuals (age 60.3 ± 8.3; 68% with CCS>0) from the prospective EISNER trial. EAT volume and density were examined in relation to coronary calcium score (CCS), inflammatory biomarkers and MACE...
November 24, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/29225032/calcification-of-thoracic-and-abdominal-aneurysms-is-associated-with-mortality-and-morbidity
#12
Mohammed M Chowdhury, Lukasz P Zieliński, James J Sun, Simon Lambracos, Jonathan R Boyle, Seamus C Harrison, James H F Rudd, Patrick A Coughlin
INTRODUCTION: Cardiovascular events are common in people with aortic aneurysms. Arterial calcification is a recognised predictor of cardiovascular outcomes in coronary artery disease. Whether calcification within abdominal and thoracic aneurysm walls is correlated with poor cardiovascular outcomes is not known. PATIENTS AND METHODS: Calcium scores were derived from computed tomography (CT) scans of consecutive patients with either infrarenal (AAA) or descending thoracic aneurysms (TAA) using the modified Agatston score...
December 7, 2017: European Journal of Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/29220061/comparison-of-carotid-intima-media-thickness-and-coronary-artery-calcium-score-for-estimating-subclinical-atherosclerosis-in-patients-with-fatty-liver-disease
#13
Hyun-Jin Kim, Hyung-Bok Park, Yongsung Suh, Yoon-Hyeong Cho, Eui-Seok Hwang, Deok-Kyu Cho, Tae-Young Choi
INTRODUCTION: Fatty liver disease (FLD) is correlated with cardiovascular disease. Carotid intima-media thickness (CIMT) and coronary artery calcium score (CACS) can noninvasively identify subclinical atherosclerosis and predict risk for cardiovascular events. This study evaluated CIMT and CACS measurements to detect subclinical atherosclerosis in patients with and without FLD. METHODS: Patients who underwent carotid and abdominal ultrasounds as well as cardiac computed tomography (CT) scans were evaluated retrospectively...
December 8, 2017: Cardiovascular Journal of Africa
https://www.readbyqxmd.com/read/29214447/association-between-common-bile-duct-diameter-and-abdominal-aorta-calcium-score
#14
Yashar Moharamzad, Sahar Abbasi, Morteza Sanei Taheri, Taraneh Faghihi Langroudi
BACKGROUND AND OBJECTIVE: There is evidence of association between aging and increase in the normal upper limit of the common bile duct (CBD) diameter. As aging is a documented risk factor for atherosclerosis, and the possible effect that atherosclerosis can have on the CBD diameter via affecting its smooth muscle contractility and blood flow, we decided to determine the association between CBD diameter and atherosclerosis in the abdominal aorta (AA). METHODS: A total of 99 asymptomatic patients (53 males and 46 females; age range of 18-88 years) without history of cholecystectomy who underwent abdominal contrast-enhanced CT scan were included...
December 6, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/29202484/usefulness-of-martin-s-method-for-estimation-of-low-density-lipoprotein-cholesterol-in-coronary-atherosclerosis
#15
Soie Chung
OBJECTIVE: This study was conducted to validate Martin's method in coronary atherosclerosis in comparison with Friedewald's equation. SUBJECTS AND METHODS: A total of 299 participants with a coronary artery calcium score (CACS) ≥ 300 and a serum triglyceride (TG) level < 400 mg/dL at Seoul National University Hospital Healthcare System Gangnam Center, Seoul, Korea were enrolled in this study. The Low-density lipoprotein cholesterol (LDL-C) was directly measured with a homogeneous assay (DLDL) and estimated by both Friedewald's equation (FLDL) and Martin's method (MLDL)...
December 4, 2017: Medical Principles and Practice: International Journal of the Kuwait University, Health Science Centre
https://www.readbyqxmd.com/read/29198984/relation-of-an-echocardiographic-based-cardiac-calcium-score-to-mitral-stenosis-severity-and-coronary-artery-disease-in-patients-with-severe-aortic-stenosis
#16
Siyuan P Sheng, Lucius A Howell, Melissa C Caughey, Michael Yeung, John P Vavalle
Patients with calcific aortic stenosis (AS) often have diffuse cardiac calcification involving the mitral valve apparatus and coronary arteries. We examined the association between global cardiac calcification quantified by a previously validated echocardiographic calcium score (eCS) with the severity of mitral stenosis (MS) and coronary artery disease (CAD) in patients with a clinical diagnosis of severe calcific AS. In this sample of 147 patients (mean age 81 ± 9 years, 50% male), 81 patients (55%) were determined by echocardiography to have some degree of MS...
October 26, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/29196542/cardiac-myosin-binding-protein-c-is-a-novel-marker-of-myocardial-injury-and-fibrosis-in-aortic-stenosis
#17
Atul Anand, Calvin Chin, Anoop S V Shah, Jacek Kwieciński, Alex Vesey, Joanna Cowell, Ekkehard Weber, Thomas Kaier, David E Newby, Marc Dweck, Michael S Marber, Nicholas L Mills
OBJECTIVE: Cardiac myosin-binding protein C (cMyC) is an abundant sarcomeric protein and novel highly specific marker of myocardial injury. Myocyte death characterises the transition from hypertrophy to replacement myocardial fibrosis in advanced aortic stenosis. We hypothesised that serum cMyC concentrations would be associated with cardiac structure and outcomes in patients with aortic stenosis. METHODS: cMyC was measured in two cohorts in which serum had previously been prospectively collected: a mechanism cohort of patients with aortic stenosis (n=161) and healthy controls (n=46) who underwent cardiac MRI, and an outcome cohort with aortic stenosis (n=104) followed for a median of 11...
December 1, 2017: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/29191782/comparison-of-the-hemodynamic-performance-of-the-balloon-expandable-sapien-3-versus-self-expandable-evolut-r-transcatheter-valve-a-case-matched-study
#18
Eduardo Enríquez-Rodríguez, Ignacio J Amat-Santos, Pilar Jiménez-Quevedo, Irene Martín-Morquecho, Gabriela Tirado-Conte, María José Pérez-Vizcayno, José Juan Gómez de Diego, Roman Arnold, Andrés Aldazábal, Paol Rojas, Alberto de Agustín, María Del Trigo, Hipólito Gutiérrez, José A San Román, Carlos Macaya, Luis Nombela-Franco
INTRODUCTION AND OBJECTIVES: The SAPIEN 3 (S3) valve and the Medtronic Evolut R (EVR) are second-generation transcatheter valves, designed to further reduce the rate of paravalvular aortic regurgitation (AoR). The aim of this study was to compare the 2 devices in terms of valve performance in a case-matched study with independent echocardiographic analysis. METHODS: Of a population of 201 patients who underwent transcatheter aortic valve implantation, 144 patients (S3, n = 80; EVR, n = 64) were matched according to aortic annulus diameter and aortic valve calcium score, as assessed by computed tomography...
November 27, 2017: Revista Española de Cardiología
https://www.readbyqxmd.com/read/29188297/coronary-calcium-score-and-cardiovascular-risk-in-elderly-populations-further-considerations
#19
Julio C Sauza-Sosa, Victor A Ferrari, Lilia M Sierra-Galan
No abstract text is available yet for this article.
November 29, 2017: JAMA Cardiology
https://www.readbyqxmd.com/read/29188289/coronary-calcium-score-and-cardiovascular-risk-in-elderly-populations-reply
#20
Philip Greenland, Yuichiro Yano, Donald M Lloyd-Jones
No abstract text is available yet for this article.
November 29, 2017: JAMA Cardiology
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