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Coronary computed tomography angiography

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https://www.readbyqxmd.com/read/28214228/coronary-artery-stent-evaluation-with-model-based-iterative-reconstruction-at-coronary-ct-angiography
#1
Fuminari Tatsugami, Toru Higaki, Hiroaki Sakane, Wataru Fukumoto, Yoko Kaichi, Makoto Iida, Yasutaka Baba, Masao Kiguchi, Yasuki Kihara, So Tsushima, Kazuo Awai
RATIONALE AND OBJECTIVES: This study aims to compare the image quality of coronary artery stent scans on computed tomography images reconstructed with forward projected model-based iterative reconstruction solution (FIRST) and adaptive iterative dose reduction 3D (AIDR 3D). MATERIALS AND METHODS: Coronary computed tomography angiography scans of 23 patients with 32 coronary stents were used. The images were reconstructed with AIDR 3D and FIRST. We generated computed tomography attenuation profiles across the stents and measured the width of the edge rise distance and the edge rise slope (ERS)...
February 14, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28214139/accuracy-of-computed-tomography-angiography-to-identify-thin-cap-fibroatheroma-detected-by-optical-coherence-tomography
#2
Nobuo Tomizawa, Kodai Yamamoto, Shinichi Inoh, Takeshi Nojo, Sunao Nakamura
BACKGROUND: Thin-cap fibroatheroma (TCFA) is assumed to cause acute coronary syndromes. OBJECTIVE: To compare the accuracy of different models for diagnosing TCFA using parameters derived by CT, validated against optical coherence tomography (OCT). METHODS: One hundred twenty-nine plaques in 106 patients were analyzed using data acquired by 64-row CT with a reconstruction thickness of 0.67 mm and an increment of 0.33 mm. TCFA was defined by OCT as a plaque with lipid content in ≥2 quadrants and the thinnest part of the fibrous cap measuring ≤65 μm...
February 9, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28210637/anomalous-origin-of-the-left-coronary-artery-from-the-pulmonary-artery-an-uncommon-coronary-anomaly-with-serious-implications-in-adulthood
#3
Venkat Gangadharan, Kamesh Sivagnanam, Ghulam Murtaza, Michael Ponders, Otto Teixeira, Timir Paul
A 36-year-old woman was seen with complaints of exertional chest pain and shortness of breath. Her medical history included atrial fibrillation and diabetes. Physical examination was unremarkable except for an irregular cardiac rhythm. Myocardial perfusion imaging revealed the presence of a large area of infarction involving the entire anterior and apical walls and part of the anteroseptal wall with minimal periinfarct ischemia. Computed tomography coronary angiogram revealed an anomalous left main coronary artery arising from the main pulmonary artery...
January 2017: Journal of Investigative Medicine High Impact Case Reports
https://www.readbyqxmd.com/read/28209366/quantifying-aortic-valve-calcification-using-coronary-computed-tomography-angiography
#4
Abdulrahman M Alqahtani, Kevin E Boczar, Vinay Kansal, Kwan Chan, Girish Dwivedi, Benjamin J W Chow
INTRODUCTION: Aortic valve calcification (AVC) has been associated with major adverse cardiovascular events and all-cause mortality. We sought to develop and validate a method to quantify AVC using coronary CT angiography (CTA). METHODS: Of 59 patients who underwent both non-contrast and contrast enhanced coronary CTA, 25 patients served as the derivation cohort and 34 patients served as the validation cohort. For non-contrast enhanced CT, quantification of AVC was performed using the Agatston method for coronary artery calcification (CAC)...
January 30, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28208116/factors-determining-left-main-coronary-artery-luminal-area
#5
Konstantinos Dean Boudoulas, Peter M Bittenbender, Haikady N Nagaraja, Omar Kahaly, Jennifer A Dickerson, Subha V Raman, Ernest L Mazzaferri, Charles A Bush
BACKGROUND: A certain minimal luminal cross-sectional area has been traditionally used in clinical practice as a cut-off value to determine severity of left main coronary artery (LMCA) stenosis. The severity of stenosis, however, depends on the baseline luminal area (ie, area prior to stenosis), which may vary among individuals. The present study was undertaken to define normal LMCA luminal area using current technology in vivo. METHODS: LMCA luminal area was determined using multislice computed tomography coronary angiography...
February 15, 2017: Journal of Invasive Cardiology
https://www.readbyqxmd.com/read/28205072/negative-predictive-value-of-stress-myocardial-perfusion-imaging-and-coronary-computed-tomography-angiography-a-meta-analysis
#6
Roberta Green, Valeria Cantoni, Mario Petretta, Wanda Acampa, Mariarosaria Panico, Pietro Buongiorno, Giorgio Punzo, Marco Salvatore, Alberto Cuocolo
BACKGROUND: Comparing the prognostic value of a negative finding by stress single-photon emission computed tomography myocardial perfusion imaging (MPI) and coronary computed tomography angiography (CCTA) may be useful to evaluate how better identify low-risk patients. We performed a meta-analysis to compare the long-term negative predictive value (NPV) of normal stress MPI and normal CCTA in subjects with suspected coronary artery disease (CAD). METHODS AND RESULTS: Studies published between January 2000 and November 2016 were identified by database search...
February 15, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28202051/variability-of-radiation-doses-of-cardiac-diagnostic-imaging-tests-the-radio-evinci-study-radiationdose-subproject-of-the-evinci-study
#7
Clara Carpeggiani, Eugenio Picano, Marco Brambilla, Claudio Michelassi, Juhani Knuuti, Philipp Kauffman, S Richard Underwood, Danilo Neglia
BACKGROUND: Patients with coronary artery disease can accumulate significant radiation dose through repeated exposures to coronary computed tomographic angiography, myocardial perfusion imaging with single photon emission computed tomography or positron emission tomography, and to invasive coronary angiography. Aim of the study was to audit radiation doses of coronary computed tomographic angiography, single photon emission computed tomography, positron emission tomography and invasive coronary angiography in patients enrolled in the prospective, randomized, multi-centre European study-EVINCI (Evaluation of Integrated Cardiac Imaging for the Detection and Characterization of Ischemic Heart Disease)...
February 16, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/28199464/identification-of-patients-with-stable-chest-pain-deriving-minimal-value-from-noninvasive-testing-the-promise-minimal-risk-tool-a-secondary-analysis-of-a-randomized-clinical-trial
#8
Christopher B Fordyce, Pamela S Douglas, Rhonda S Roberts, Udo Hoffmann, Hussein R Al-Khalidi, Manesh R Patel, Christopher B Granger, John Kostis, Daniel B Mark, Kerry L Lee, James E Udelson
Importance: Guidelines recommend noninvasive testing for patients with stable chest pain, although many subsequently have normal test results and no adverse clinical events. Objective: To describe a risk tool developed to use only pretest clinical data to identify patients with chest pain with normal coronary arteries and no clinical events during follow-up (minimal-risk cohort). Design, Setting, and Participants: This secondary analysis of a randomized, pragmatic comparative effectiveness trial (Prospective Multicenter Imaging Study for Evaluation of Chest Pain [PROMISE]) includes stable, symptomatic outpatients without known coronary artery disease referred for noninvasive testing at 193 sites in North America...
February 15, 2017: JAMA Cardiology
https://www.readbyqxmd.com/read/28196758/evaluation-of-image-quality-of-coronary-artery-plaque-with-rapid-kvp-switching-dual-energy-ct
#9
Yasutoshi Ohta, Shinichiro Kitao, Tomomi Watanabe, Junichi Kishimoto, Kazuhiro Yamamoto, Toshihide Ogawa
We evaluated the virtual monochromatic imaging (VMI) energy levels that maximize image quality of each coronary plaque component in dual-energy computed tomography angiography in 495 coronary segments (45 for each energy level). Maximal signal-to-noise ratios were different for plaque, lumen, fat, and surrounding tissue (p<0.05). Maximal contrast-to-noise ratios were observed at 70keV for calcified plaque (CP), non-calcified plaque (NCP), and fat in comparison with the lumen (p<0.05), and 70keV and 120keV for NCP in comparison with fat (p=0...
February 1, 2017: Clinical Imaging
https://www.readbyqxmd.com/read/28190514/transluminal-attenuation-gradient-and-corrected-models-in-coronary-ct-angiography-for-determining-stenosis-severity-a-primary-study-using-dual-source-ct
#10
K Peng, N Xu, L Zhang, F Xiao, N Indima, J Zhang, Y Shen, W Peng, G Tang
AIM: To compare the incremental value of transluminal attenuation gradient (TAG), TAG with corrected contrast opacification (TAG-CCO), and TAG with exclusion of calcified coronary segments (TAG-ExC) in determining the stenosis severity of coronary arteries using coronary angiography (CAG) as the reference standard. MATERIALS AND METHODS: One hundred and fifteen patients who underwent computed tomography coronary angiography (CTCA) and confirmed by coronary angiography (CAG) were included in the retrospective analysis...
February 9, 2017: Clinical Radiology
https://www.readbyqxmd.com/read/28188475/myocardial-perfusion-imaging-with-pet
#11
Roel S Driessen, Pieter G Raijmakers, Wijnand J Stuijfzand, Paul Knaapen
Noninvasive assessment of coronary artery disease remains a challenging task, with a large armamentarium of diagnostic modalities. Myocardial perfusion imaging (MPI) is widely used for this purpose whereby cardiac positron emission tomography (PET) is considered the gold standard. Next to relative radiotracer distribution, PET allows for measurement of absolute myocardial blood flow. This quantification of perfusion improves diagnostic accuracy and prognostic value. Cardiac hybrid imaging relies on the fusion of anatomical and functional imaging using coronary computed tomography angiography and MPI, respectively, and provides incremental value as compared with either stand-alone modality...
February 10, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28183285/early-detection-of-myocardial-infarction-following-blunt-chest-trauma-by-computed-tomography-a-case-report
#12
Thung-Lip Lee, Chin-Feng Hsuan, Chen-Hsiang Shih, Huai-Wen Liang, Hsing-Shan Tsai, Wei-Kung Tseng, Kwan-Lih Hsu
BACKGROUND: Blunt cardiac trauma encompasses a wide range of clinical entities, including myocardial contusion, cardiac rupture, valve avulsion, pericardial injuries, arrhythmia, and even myocardial infarction. Acute myocardial infarction due to coronary artery dissection after blunt chest trauma is rare and may be life threatening. Differential diagnosis of acute myocardial infarction from cardiac contusion at this setting is not easy. CASE PRESENTATION: Here we demonstrated a case of blunt chest trauma, with computed tomography detected myocardium enhancement defect early at emergency department...
February 10, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/28176490/diversity-and-determinants-of-the-three-dimensional-anatomical-axis-of-the-heart-as-revealed-using-multidetector-row-computed-tomography
#13
Shumpei Mori, Robert H Anderson, Natsuko Tahara, Yu Izawa, Takayoshi Toba, Sei Fujiwara, Shinsuke Shimoyama, Yoshiaki Watanabe, Tatsuya Nishii, Atsushi K Kono, Ken-Ichi Hirata
The location of the heart within the thorax varies significantly between individuals. The resultant diversity of the anatomical cardiac long axis, however, and its determinants, have yet to be systematically investigated. We enrolled 100 consecutive patients undergoing coronary arterial computed tomographic angiography, decomposing the vector of the anatomical cardiac long axis by projecting it to horizontal, frontal, and sagittal planes. The projected vectors on each plane were then converted into three rotation angles using coordinate transformation...
February 8, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28174402/-coronary-pulmonary-artery-fistula-in-a-hemodialysis-patient
#14
Ryuichi Yoshimura, Yoshihiro Naruse, Keita Tanaka, Yangsin Lee
We report a case of coronary-pulmonary artery fistula in a hemodialysis patient treated surgically. A 47-year-old man was admitted with chest pain and exertional dyspnea that progressively worsened over the previous 2 months. He had a history of end-stage renal disease and has been on hemodialysis for 5 years. Coronary angiography and computed tomography revealed coronary-pulmonary artery fistula that originated from both the left anterior descending coronary artery and the right coronary artery. Under cardiopulmonary bypass, we opened the pulmonary artery and closed the fistula...
February 2017: Kyobu Geka. the Japanese Journal of Thoracic Surgery
https://www.readbyqxmd.com/read/28174196/sex-differences-in-the-performance-of-cardiac-computed-tomography-compared-with-functional-testing-in-evaluating-stable-chest-pain-subanalysis-of-the-multicenter-randomized-crescent-trial-calcium-imaging-and-selective-ct-angiography-in-comparison-to-functional
#15
Marisa Lubbers, Adriaan Coenen, Tobias Bruning, Tjebbe Galema, Jurgen Akkerhuis, Boudewijn Krenning, Paul Musters, Mohamed Ouhlous, Ahno Liem, Andre Niezen, Admir Dedic, Ron van Domburg, Miriam Hunink, Koen Nieman
BACKGROUND: Cardiac computed tomography (CT) represents an alternative diagnostic strategy for women with suspected coronary artery disease, with potential benefits in terms of effectiveness and cost-efficiency. METHODS AND RESULTS: The CRESCENT trial (Calcium Imaging and Selective CT Angiography in Comparison to Functional Testing for Suspected Coronary Artery Disease) prospectively randomized 350 patients with stable angina (55% women; aged 55±10 years), mostly with an intermediate coronary artery disease probability, between cardiac CT and functional testing...
February 2017: Circulation. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28169175/in%C3%A2-vivo-coronary-lesion-differentiation-with-computed-tomography-angiography-and-intravascular-ultrasound-as-compared-to-optical-coherence-tomography
#16
Wouter G Wieringa, Chris P H Lexis, Erik Lipsic, Hindrik W van der Werf, Johannes G M Burgerhof, Vincent E Hagens, G Louis Bartels, Alexander Broersen, Remco A Schurer, Eng-Shiong Tan, Pim van der Harst, Ad F M van den Heuvel, Tineke P Willems, Gabija Pundziute
BACKGROUND: In vitro studies have shown the feasibility of coronary lesion grading with computed tomography angiography (CTA), intravascular ultrasound (IVUS) and optical coherence tomography (OCT) as compared to histology, whereas OCT had the highest discriminatory capacity. OBJECTIVE: We investigated the ability of CTA and IVUS to differentiate between early and advanced coronary lesions in vivo, OCT serving as standard of reference. METHODS: Multimodality imaging was prospectively performed in 30 NSTEMI patients...
January 22, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28169140/influence-of-cardiovascular-risk-factors-on-the-prevalence-of-coronary-atherosclerosis-in-patients-with-angiographically-normal-coronary-arteries
#17
Daniel O Bittner, Lutz Klinghammer, Mohamed Marwan, Jasmin Schmid, Christian Layritz, Udo Hoffmann, Stephan Achenbach, Tobias Pflederer
RATIONALE AND OBJECTIVES: Cardiovascular (CV) disease is predominately influenced by CV risk factors and coronary computed tomography angiography (CTA) is capable of detecting early-stage coronary artery disease. We sought to determine the influence of CV risk factors on the prevalence of nonobstructive atherosclerosis in patients with normal-appearing coronary arteries in invasive coronary angiography (ICA). MATERIALS AND METHODS: In this retrospective analysis, we included 60 consecutive symptomatic patients, having undergone ICA and coronary CTA...
February 3, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28168977/diffuse-coronary-artery-disease-among-other-atherosclerotic-plaque-characteristics-by-coronary-computed-tomography-angiography-for-predicting-coronary-vessel-specific-ischemia-by-fractional-flow-reserve
#18
Asim Rizvi, Bríain Ó Hartaigh, Ibrahim Danad, Donghee Han, Ji Hyun Lee, Heidi Gransar, Jackie Szymonifka, Fay Y Lin, James K Min
BACKGROUND AND AIMS: Coronary computed tomography angiography (CCTA) permits effective identification of diffuse CAD and atherosclerotic plaque characteristics (APCs). We sought to examine the usefulness of diffuse CAD beyond luminal narrowing and APCs by CCTA to detect vessel-specific ischemia. METHODS: 407 vessels (n = 252 patients) from the DeFACTO diagnostic accuracy study were retrospectively analyzed for percent plaque diffuseness (PD). Percent plaque diffuseness (PD) was obtained on per-vessel level by summation of all contiguous lesion lengths and divided by total vessel length, and was logarithmically transformed (log percent PD)...
January 16, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28168796/plasma-biomarker-levels-and-non-obstructive-coronary-artery-disease-determined-by-coronary-computed-tomography-angiography
#19
Elin B Brolin, Stefan Agewall, Kerstin Cederlund, Christina Ekenbäck, Loghman Henareh, Karin Malmqvist, Andreas Rück, Anders Svensson, Per Tornvall
PURPOSE: Coronary computed tomography angiography (CTA) and several circulating biomarkers have prognostic value regarding cardiovascular disease (CVD) events, but their association is incompletely studied. We aimed to investigate whether markers of lipid metabolism, inflammation and kidney function could predict non-obstructive coronary artery disease (CAD) determined by coronary CTA, in a low-to-intermediate-risk group. METHODS: Coronary CTA and laboratory testing were performed for 115 subjects (45-70 years), with low prevalence of CVD risk factors, predominantly low-to-intermediate Framingham risk and normal or mildly reduced kidney function...
February 6, 2017: Clinical Physiology and Functional Imaging
https://www.readbyqxmd.com/read/28164120/coronary-computed-tomography-angiography-in-combination-with-coronary-artery-calcium-scoring-for-the-preoperative-cardiac-evaluation-of-liver-transplant-recipients
#20
REVIEW
Jae Moon Choi, Yu-Gyeong Kong, Joon-Won Kang, Young-Kug Kim
Liver transplantation is the best treatment option for early-stage hepatocellular carcinoma, liver cirrhosis, fulminant liver failure, and end-stage liver diseases. Even though advances in surgical techniques and perioperative care have improved postoperative outcomes, perioperative cardiovascular complications are a leading cause of postoperative morbidity and mortality following liver transplantation. Ischemic coronary artery disease (CAD) and cardiomyopathy are the most common cardiovascular diseases and could be negative predictors of postoperative outcomes in liver transplant recipients...
2017: BioMed Research International
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