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Coronary ct angiography

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https://www.readbyqxmd.com/read/29931809/sex-differences-in-coronary-plaque-composition-evaluated-by-coronary-computed-tomography-angiography-in-newly-diagnosed-type-2-diabetes-association-with-low-grade-inflammation
#1
M Mrgan, J Gram, M Hecht Olsen, D Dey, B Linde Nørgaard, J Gram, N P Rønnow Sand
AIM: To determine differences in coronary plaque composition and inflammatory biomarkers between men and women with newly diagnosed Type 2 diabetes without known cardiovascular disease. METHODS: A total of 88 people with newly diagnosed (<1 year) Type 2 diabetes underwent contrast-enhanced coronary computed tomography angiography. Advanced coronary plaque analysis was performed using semi-automated software. Plasma concentrations of inflammatory biomarkers were determined...
June 22, 2018: Diabetic Medicine: a Journal of the British Diabetic Association
https://www.readbyqxmd.com/read/29927869/association-of-aortic-arch-width-assessed-by-noncontrast-cardiac-computed-tomography-with-cardiac-remodeling-cardiac-function-and-atherosclerosis-in-a-japanese-cohort
#2
Huong Nguyen-Thu, Yoshiaki Ohyama, Ayako Taketomi-Takahashi, Tien Nguyen-Cong, Akio Sugimoto, Makito Sato, Hisako Sumiyoshi, Tetsuya Nakamura, Masahiko Kurabayashi, Yoshito Tsushima
PURPOSE: Age-related aortic changes are related to adverse cardiac remodeling and reduced cardiac function. Here, we aim to assess the correlations between aortic arch width (AAW) and left ventricular (LV) remodeling and LV function as well as coronary artery calcification (CAC). MATERIALS AND METHODS: This retrospective study included 194 patients (ages, 67±12 y) who underwent both coronary computed tomography angiography and echocardiography. The AAW is defined as the longest width between the ascending and descending aorta on a transaxial noncontrast coronary computed tomography angiography image at the level of the pulmonary artery bifurcation...
July 2018: Journal of Thoracic Imaging
https://www.readbyqxmd.com/read/29914866/diagnostic-accuracy-of-a-machine-learning-approach-to-coronary-computed-tomographic-angiography-based-fractional-flow-reserve-result-from-the-machine-consortium
#3
Adriaan Coenen, Young-Hak Kim, Mariusz Kruk, Christian Tesche, Jakob De Geer, Akira Kurata, Marisa L Lubbers, Joost Daemen, Lucian Itu, Saikiran Rapaka, Puneet Sharma, Chris Schwemmer, Anders Persson, U Joseph Schoepf, Cezary Kepka, Dong Hyun Yang, Koen Nieman
BACKGROUND: Coronary computed tomographic angiography (CTA) is a reliable modality to detect coronary artery disease. However, CTA generally overestimates stenosis severity compared with invasive angiography, and angiographic stenosis does not necessarily imply hemodynamic relevance when fractional flow reserve (FFR) is used as reference. CTA-based FFR (CT-FFR), using computational fluid dynamics (CFD), improves the correlation with invasive FFR results but is computationally demanding...
June 2018: Circulation. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29914536/very-late-presentation-of-anomalous-origin-of-the-left-coronary-artery-from-the-pulmonary-artery-case-report
#4
Pairoj Chattranukulchai, Jule Namchaisiri, Monravee Tumkosit, Sarinya Puwanant, Yongkasem Vorasettakarnkij, Suphot Srimahachota, Smonporn Boonyaratavej
BACKGROUND: Anomalous origin of the left coronary artery from the pulmonary artery (ALCAPA) is a rare congenital coronary anomaly. The enlarged right coronary artery provides retrograde collaterals to supply the left ventricle then preferentially directs into the lower pressure pulmonary artery system causing coronary steal phenomenon. Few patients who survive through adulthood without surgery must have abundant, well-formed functioning collaterals with adequate perfusion of the left ventricle...
June 18, 2018: Journal of Cardiothoracic Surgery
https://www.readbyqxmd.com/read/29914384/acute-myocardial-infarction-after-blunt-chest-wall-trauma-with-underlying-coronary-aneurysm-a-case-report
#5
Xu Guo, Xiaoou Wang, Xinzhong Zhang, Ahmed O Ahmed, David H Hsi, Daqing Zhang
BACKGROUND: Kawasaki disease is an acute febrile disease with mucocutaneous and cardiovascular involvement affecting infants and young children. Though coronary artery abnormalities are common in Kawasaki disease, no consensus has been reached regarding the treatment of acute coronary artery diseases in this population. CASE PRESENTATION: We described a case of myocardial infarction triggered by blunt chest wall trauma in a 20 years old girl. She presented with chest pain and breathlessness with brief syncope, lab results and electrocardiogram findings were consistent with acute myocardial infarction...
June 18, 2018: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/29909113/coronary-computed-tomography-angiography-versus-stress-echocardiography-in-acute-chest-pain-a-randomized-controlled-trial
#6
Jeffrey M Levsky, Linda B Haramati, Daniel M Spevack, Mark A Menegus, Terence Chen, Sarah Mizrachi, Durline Brown-Manhertz, Samantha Selesny, Rikah Lerer, Deborah J White, Jonathan N Tobin, Cynthia C Taub, Mario J Garcia
OBJECTIVES: This study sought to compare early emergency department (ED) use of coronary computed tomography angiography (CTA) and stress echocardiography (SE) head-to-head. BACKGROUND: Coronary CTA has been promoted as the early ED chest pain triage imaging method of choice, whereas SE is often overlooked in this setting and involves no ionizing radiation. METHODS: The authors randomized 400 consecutive low- to intermediate-risk ED acute chest pain patients without known coronary artery disease and a negative initial serum troponin level to immediate coronary CTA (n = 201) or SE (n = 199)...
June 8, 2018: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29909109/effects-of-statins-on-coronary-atherosclerotic-plaques-the-paradigm-progression-of-atherosclerotic-plaque-determined-by-computed-tomographic-angiography-imaging-study
#7
Sang-Eun Lee, Hyuk-Jae Chang, Ji Min Sung, Hyung-Bok Park, Ran Heo, Asim Rizvi, Fay Y Lin, Amit Kumar, Martin Hadamitzky, Yong Jin Kim, Edoardo Conte, Daniele Andreini, Gianluca Pontone, Matthew J Budoff, Ilan Gottlieb, Byoung Kwon Lee, Eun Ju Chun, Filippo Cademartiri, Erica Maffei, Hugo Marques, Jonathon A Leipsic, Sanghoon Shin, Jung Hyun Choi, Kavitha Chinnaiyan, Gilbert Raff, Renu Virmani, Habib Samady, Peter H Stone, Daniel S Berman, Jagat Narula, Leslee J Shaw, Jeroen J Bax, James K Min
OBJECTIVES: This study sought to describe the impact of statins on individual coronary atherosclerotic plaques. BACKGROUND: Although statins reduce the risk of major adverse cardiovascular events, their long-term effects on coronary atherosclerosis remain unclear. METHODS: We performed a prospective, multinational study consisting of a registry of consecutive patients without history of coronary artery disease who underwent serial coronary computed tomography angiography at an interscan interval of ≥2 years...
June 8, 2018: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29909103/prrospective-comparison-of-ffr-derived-from-coronary-ct-angiography-with-spect-perfusion-imaging-in-stable-coronary-artery-disease-the-reassess-study
#8
Niels Peter Rønnow Sand, Karsten Tange Veien, Søren Steen Nielsen, Bjarne Linde Nørgaard, Pia Larsen, Allan Johansen, Søren Hess, Lone Deibjerg, Majed Husain, Anders Junker, Kristian Korsgaard Thomsen, Allan Rohold, Lisette Okkels Jensen
OBJECTIVES: This study sought to compare the per-patient diagnostic performance of coronary computed tomography angiography (CTA)-derived fractional flow reserve (FFRCT ) with that of single-photon emission computed tomography (SPECT), using a fractional flow reserve (FFR) value of ≤0.80 as the reference for diagnosing at least 1 hemodynamically significant stenosis in a head-to-head comparison of patients with intermediate coronary stenosis as determined by coronary CTA. BACKGROUND: No previous study has prospectively compared the diagnostic performance of FFRCT and myocardial perfusion imaging by SPECT in symptomatic patients with intermediate range coronary artery disease (CAD)...
June 9, 2018: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29907855/diagnostic-yield-and-accuracy-of-coronary-ct-angiography-after-abnormal-nuclear-myocardial-perfusion-imaging
#9
Felix G Meinel, U Joseph Schoepf, Jacob C Townsend, Brian A Flowers, Lucas L Geyer, Ullrich Ebersberger, Aleksander W Krazinski, Wolfgang G Kunz, Kolja M Thierfelder, Deborah W Baker, Ashan M Khan, Valerian L Fernandes, Terrence X O'Brien
We aimed to determine the diagnostic yield and accuracy of coronary CT angiography (CCTA) in patients referred for invasive coronary angiography (ICA) based on clinical concern for coronary artery disease (CAD) and an abnormal nuclear stress myocardial perfusion imaging (MPI) study. We enrolled 100 patients (84 male, mean age 59.6 ± 8.9 years) with an abnormal MPI study and subsequent referral for ICA. Each patient underwent CCTA prior to ICA. We analyzed the prevalence of potentially obstructive CAD (≥50% stenosis) on CCTA and calculated the diagnostic accuracy of ≥50% stenosis on CCTA for the detection of clinically significant CAD on ICA (defined as any ≥70% stenosis or ≥50% left main stenosis)...
June 15, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29907444/diagnostic-accuracy-of-asla-score-a-novel-ct-angiographic-index-and-aggregate-plaque-volume-in-the-assessment-of-functional-significance-of-coronary-stenosis
#10
Ravi Kiran Munnur, James D Cameron, Liam M McCormick, Peter J Psaltis, Nitesh Nerlekar, Brian S H Ko, Ian T Meredith, Sujith Seneviratne, Dennis T L Wong
BACKGROUND: Visual assessment of diameter-stenosis on Computed Tomography Coronary Angiography (CTCA) lacks specificity to determine functional significance of coronary artery stenosis. Percent-aggregate plaque volume (%APV) and ASLA score, which incorporates Area of Stenosis, Lesion length, and area of myocardium subtended estimated by APPROACH score (Alberta Provincial Project for Outcome Assessment in Coronary Heart Disease) have been described to predict lesion specific ischaemia in focal lesions with intermediate stenosis...
June 8, 2018: International Journal of Cardiology
https://www.readbyqxmd.com/read/29900670/applying-three-different-methods-of-measuring-ctdi-free-air-to-the-extended-ctdi-formalism-for-wide-beam-scanners-iec-60601-2-44-a-comparative-study
#11
Robert Bujila, Love Kull, Mats Danielsson, Jonas Andersson
PURPOSE: The weighted CT dose index (CTDIw ) has been extended for a nominal total collimation width (nT) greater than 40 mm and relies on measurements of CTDIfreeair. The purpose of this work was to compare three methods of measuring CTDIfreeair and subsequent calculations of CTDIw to investigate their clinical appropriateness. METHODS: The CTDIfreeair, for multiple nTs up to 160 mm, was calculated from (1) high-resolution air kerma profiles from a step-and-shoot translation of a liquid ionization chamber (LIC) (considered to be a dosimetric reference), (2) pencil ionization chamber (PIC) measurements at multiple contiguous positions, and (3) air kerma profiles obtained through the continuous translation of a solid-state detector...
June 14, 2018: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/29899591/3d-printed-cardiovascular-patient-specific-phantoms-used-for-clinical-validation-of-a-ct-derived-ffr-diagnostic-software
#12
Kelsey N Sommer, Lauren Shepard, Nitant Vivek Karkhanis, Vijay Iyer, Erin Angel, Michael F Wilson, Frank J Rybicki, Dimitrios Mitsouras, Stephen Rudin, Ciprian N Ionita
Purpose: 3D printed patient specific vascular models provide the ability to perform precise and repeatable benchtop experiments with simulated physiological blood flow conditions. This approach can be applied to CT-derived patient geometries to determine coronary flow related parameters such as Fractional Flow Reserve (FFR). To demonstrate the utility of this approach we compared bench-top results with non-invasive CT-derived FFR software based on a computational fluid dynamics algorithm and catheter based FFR measurements...
February 2018: Proceedings of SPIE
https://www.readbyqxmd.com/read/29899200/utility-of-coronary-computed-tomography-angiography-in-the-diagnosis-and-management-of-acute-phase-adult-onset-kawasaki-disease
#13
Toshiki Kuno, Akimichi Shibata, Masaki Kodaira, Yohei Numasawa
No abstract text is available yet for this article.
June 12, 2018: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/29896246/automatic-tube-potential-selection-with-tube-current-modulation-in-coronary-ct-angiography-can-it-achieve-consistent-image-quality-among-various-individuals
#14
Xiao-Ping Wang, Xiao-Mei Zhu, Yin-Su Zhu, Wang-Yan Liu, Xiao-Han Yang, Wei-Wei Huang, Yi Xu, Li-Jun Tang
The present study included a total of 111 consecutive patients who had undergone coronary computed tomography (CT) angiography, using a first-generation dual-source CT with automatic tube potential selection and tube current modulation. Body weight (BW) and body mass index (BMI) were recorded prior to CT examinations. Image noise and attenuation of the proximal ascending aorta (AA) and descending aorta (DA) at the middle level of the left ventricle were measured. Correlations between BW, BMI and objective image quality were evaluated using linear regression...
July 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29891235/prodromal-symptoms-predict-myocardial-involvement-in-patients-with-acute-idiopathic-pericarditis
#15
Aviv Mager, David Berger, Hadas Ofek, Yoav Hammer, Zaza Iakobishvili, Ran Kornowski
BACKGROUND: Myocardial involvement is common in acute idiopathic pericarditis and can, in some cases, lead to life-threatening complications. Acute idiopathic pericarditis is often preceded by various prodromal symptoms, but whether these symptoms can predict myocardial involvement is unclear. The aim of the study was to examine the value of different prodromal symptoms of acute idiopathic pericarditis for predicting myocardial involvement. METHODS AND RESULTS: Patients diagnosed with acute idiopathic pericarditis in 2007-2017 at our hospital were identified by database search...
June 1, 2018: International Journal of Cardiology
https://www.readbyqxmd.com/read/29888156/a-72-year-old-patient-with-longstanding-untreated-familial-hypercholesterolemia-but-no-coronary-artery-calcification-a-case-report
#16
Kipp W Johnson, Joel T Dudley, Jason R Bobe
Familial hypercholesterolemia (FH) is a genetic disease associated with persistently elevated levels of low-density lipoprotein cholesterol (LDL-C), which ultimately leads to greatly increased rates of atherosclerosis and cardiovascular disease. Atherosclerosis progression can be clinically approximated through measurement of coronary artery calcification (CAC). CAC can be measured via electron beam computed tomography (EBCT), multi-slice computed tomography (MSCT), or contrast-enhanced CT coronary angiography (CTCA)...
April 9, 2018: Curēus
https://www.readbyqxmd.com/read/29886757/an-open-label-prospective-multicenter-non-interventional-study-of-iodixanol-270-mg-i-ml-for-use-in-individuals-undergoing-computed-tomography-angiography-in-real-world-clinical-practice
#17
Xiangying Du, Bin Lu, Daoyu Hu, Bin Song, Kuncheng Li
Background Concern about radiation exposure is leading to an increasing interest in low-concentration contrast medium administration. Purpose To evaluate the image quality and safety profile after administration of iodixanol 270 mg I/mL at 100-kVp tube voltage with iterative reconstruction in subjects undergoing computed tomography angiography (CTA). Material and Methods Patients who completed CTA examination using iodixanol 270 mg I/mL and 100-kVp tube voltage along with iterative reconstruction for coronary, aortic, head and neck, renal, or pulmonary arteries were included...
January 1, 2018: Acta Radiologica
https://www.readbyqxmd.com/read/29885695/ct-morphological-index-provides-incremental-value-to-machine-learning-based-ct-ffr-for-predicting-hemodynamically-significant-coronary-stenosis
#18
Mengmeng Yu, Zhigang Lu, Wenbin Li, Meng Wei, Jing Yan, Jiayin Zhang
AIMS: To study the diagnostic performance of the ratio of Duke jeopardy score (DJS) to the minimal lumen diameter (MLD) at coronary computed tomographic angiography (CCTA) and machine learning based CT-FFR for differentiating functionally significant from insignificant lesions, with reference to fractional flow reserve (FFR). METHODS AND RESULTS: Patients who underwent both coronary CTA and FFR measurement at invasive coronary angiography (ICA) within 2 weeks were retrospectively included in our study...
August 15, 2018: International Journal of Cardiology
https://www.readbyqxmd.com/read/29883266/ct-and-mr-imaging-of-cardiothoracic-vasculitis
#19
Jordi Broncano, Daniel Vargas, Sanjeev Bhalla, Kristopher W Cummings, Constantine A Raptis, Antonio Luna
The term vasculitis includes a variable group of entities in which the common characteristic is inflammation of the walls of blood vessels occurring at some time during the course of the disease. The vasculitides can be divided into primary and secondary vasculitides, depending on the etiology and according to the size of the vessel affected. Both primary vasculitis and secondary vasculitis are associated with cardiac morbidity that is often subclinical. Cardiac involvement is associated with prognostic implications and higher rates of related mortality...
June 8, 2018: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/29883223/respiratory-insufficiency-from-myasthenia-gravis-and-polymyositis-due-to-malignant-thymoma-triggering-takotsubo-syndrome
#20
Josef Finsterer, Claudia Stöllberger, Chen-Yu Ho
BACKGROUND: Takotsubo syndrome (TTS) is a non-ischemic cardiomyopathy with sudden but transient systolic dysfunction. TTS mimics myocardial infarction clinically, chemically, and electrocardiographically but echocardiography typically shows apical ballooning and coronary angiography is normal. TTS has not been reported in a patient with myasthenia gravis (MG) and polymyositis due to a malignant thymoma. CASE REPORT: Two weeks prior to admission, a 76yo female developed dysarthria, chronic coughing, and disabling myalgias of the entire musculature...
June 8, 2018: International Journal of Neuroscience
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