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Coronary computed tomography angiography

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https://www.readbyqxmd.com/read/29032716/prediction-of-coronary-plaque-progression-using-biomechanical-factors-and-vascular-characteristics-based-on-computed-tomography-angiography
#1
Xiujian Liu, Guanghui Wu, Chuangye Xu, Yuna He, Lixia Shu, Yuyang Liu, Nan Zhang, Changyan Lin
OBJECTIVES: Coronary atherosclerotic plaques progress in a highly individual manner. Accurately predicting plaque progression will promote clinical management of atherosclerosis. The purpose of this study was to investigate the role of local biomechanics factors and vascular characteristics in coronary plaque progression and arterial remodeling. METHODS: Computed tomography angiography-based three-dimensional reconstruction of the native right coronary artery was performed in vivo in twelve patients with acute coronary syndrome at baseline and 12-month follow-up...
October 16, 2017: Computer Assisted Surgery (Abingdon, England)
https://www.readbyqxmd.com/read/29032714/fusion-of-optical-coherence-tomography-and-angiography-for-numerical-simulation-of-hemodynamics-in-bioresorbable-stented-coronary-artery-based-on-patient-specific-model
#2
Chenxi Huang, Yuanhang Zhou, Xiaoxin Mao, Jianhua Tong, Lei Zhang, Fei Chen, Yongtao Hao
Three-dimensional simulations of coronary artery using finite element analysis are considered as effective means to understand the biomechanical properties after the stent was deployed. Bioresorbable vascular scaffolds are new-generation stents used by people. Intravascular optical coherence tomography is an emerging technique for detecting struts. The common 3 D reconstruction methods are using Intravascular Ultrasound (IVUS) or angiographies. However, it loses the details about geometry model. Fusing of optical coherence tomography and angiography to reconstruct the bioresorbable stented coronary artery based on patient-specific mode is an innovative method to reconstruct the high fidelity geometry...
October 16, 2017: Computer Assisted Surgery (Abingdon, England)
https://www.readbyqxmd.com/read/29028985/impact-of-coronary-lumen-reconstruction-on-the-estimation-of-endothelial-shear-stress-in-vivo-comparison-of-three-dimensional-quantitative-coronary-angiography-and-three-dimensional-fusion-combining-optical-coherent-tomography
#3
Jihoon Kweon, Soo-Jin Kang, Young-Hak Kim, June-Goo Lee, Seungbong Han, Hojin Ha, Dong Hyun Yang, Joon-Won Kang, Tae-Hwan Lim, Osung Kwon, Jung-Min Ahn, Pil Hyung Lee, Duk-Woo Park, Seung-Whan Lee, Cheol Whan Lee, Seong-Wook Park, Seung-Jung Park
Aims: It is not clearly elucidated how the fusion technique improves the accuracy of endothelial shear stress (ESS) prediction, in comparison with that of three-dimensional (3D) quantitative coronary angiography (QCA) alone. We aimed to evaluate the difference in geometric measurements and haemodynamic estimation between 3D QCA and a 3D fusion model combining 3D QCA and optical coherence tomography (OCT). Methods and results: Computational fluid dynamics was assessed in the coronary models of 20 patients...
September 25, 2017: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/29027093/long-term-prognostic-value-of-coronary-computed-tomography-angiography
#4
REVIEW
Takor B Arrey-Mbi, Seth M Klusewitz, Todd C Villines
Coronary CT angiography (CTA) is a highly accurate test for the diagnosis of coronary artery disease (CAD), with its use guided by numerous contemporary appropriate use criteria and clinical guidelines. Unique among non-invasive tests for CAD, coronary CTA provides direct visualization of coronary atherosclerosis for the assessment of angiographic stenosis, as well as validated measures of plaque vulnerability. Long-term studies now clearly demonstrate that the absence of CAD on coronary CTA identifies a patient that is at very low risk for future cardiovascular events...
October 12, 2017: Current Treatment Options in Cardiovascular Medicine
https://www.readbyqxmd.com/read/29025029/ct-coronary-imaging-a-fast-evolving-world
#5
Prabhakar Rajiah, Suhny Abbara
Computed tomography (CT) has become an important modality in the evaluation of coronary artery disease (CAD). The tremendous technological advances in CT in the last two decades has made it possible to obtain high quality images of coronary arteries with high spatial and temporal resolutions. Multiple trials have confirmed the accuracy of CT compared to invasive catheter angiography. CT is also able to evaluate beyond the lumen in characterizing and quantifying atherosclerotic plaques, including evaluation of high risk features...
September 4, 2017: QJM: Monthly Journal of the Association of Physicians
https://www.readbyqxmd.com/read/29016370/heavily-calcified-coronary-arteries-advanced-calcium-subtraction-improves-luminal-visualization-and-diagnostic-confidence-in-dual-energy-coronary-computed-tomography-angiography
#6
Domenico De Santis, Kwang Nam Jin, U Joseph Schoepf, Katharine L Grant, Carlo N De Cecco, John W Nance, Thomas J Vogl, Andrea Laghi, Moritz H Albrecht
OBJECTIVES: The aim of this study was to evaluate a prototype dual-energy computed tomography calcium subtraction algorithm and its impact on luminal visualization in patients with heavily calcified coronary arteries. MATERIALS AND METHODS: Twenty-nine patients (62% male; mean age, 64 ± 7 years) who had undergone dual-energy coronary computed tomography angiography were retrospectively included in this institutional review board-approved, Health Insurance Portability and Accountability Act-compliant study...
October 9, 2017: Investigative Radiology
https://www.readbyqxmd.com/read/28993120/coronary-lumen-volume-to-myocardial-mass-ratio-in-primary-microvascular-angina
#7
Rominder Grover, Jonathon A Leipsic, John Mooney, Shaw-Hua Kueh, Mickael Ohana, Bjarne L Nᴓrgaard, Ashkan Eftekhari, Jeroen J Bax, Darra T Murphy, Cameron J Hague, Michael A Seidman, Philipp Blanke, Tara Sedlak, Stephanie L Sellers
BACKGROUND: Microvascular angina (MVA) is an incompletely understood clinical entity. Computational analysis of coronary Computed Tomography Angiography (CTA) has shown an association between low coronary lumen volume to myocardial mass (V/M) ratio and lower Fractional Flow Reserve values, independent of plaque measures. We hypothesized that low V/M ratio may be present in patients with MVA. METHODS: A retrospective case-control analysis was performed using patients fulfilling guideline criteria for MVA with controls matched for age, gender, coronary risk factors and atherosclerotic plaque burden...
September 22, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28993037/reversible-stress-cardiomyopathy-secondary-to-aneurysmal-subarachnoid-hemorrhage-a-case-report
#8
Konstantinos Lampropoulos, Evangelos Giannoulis, Bazoukis George, Gary Tse, Epameinondas Triantafyllou, Athanasios Triantafyllou
BACKGROUND: Acute cerebral incidents have been correlated with cardiac manifestations. Specifically, subarachnoid hemorrhage has been correlated with a syndrome described as neurogenic stress cardiomyopathy and mimics acute coronary syndrome. CASE REPORT: A 55-year-old woman presented at the Emergency Department of our hospital complaining of vomiting and headache of sudden onset. Computed tomography angiography revealed a ruptured aneurysm at the tip of the basilar artery and the patient underwent a successful complete embolism of the sac of the aneurysm...
October 6, 2017: Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28990944/the-opinion-of-turkish-cardiologists-on-current-malpractice-system-and-an-alternative-patient-compensation-system-proposal-pcs-study-group
#9
Ayhan Olcay, Sadık Volkan Emren, Gamze Babür Güler, Ekrem Güler, Vedat Ertunç, Rida Berilgen, Abdullah Aslan, Ersin Çağrı Şimşek, Şükriye Ebru Gölcük, Kıvanç Yalın
OBJECTIVE: Cardiologists participate in the diagnosis and interventional treatment of numerous high-risk patients. The goal of this study was to investigate how the current malpractice system in Turkey influences cardiologists' diagnostic and interventional behavior and to obtain their opinions about an alternative patient compensation system. METHODS: The present cross-sectional study assessed the practice of defensive medicine among cardiologists who are actively working in various types of workplace within the Turkish healthcare system...
October 2017: Türk Kardiyoloji Derneği Arşivi: Türk Kardiyoloji Derneğinin Yayın Organıdır
https://www.readbyqxmd.com/read/28988831/calcification-remodeling-index-assessed-by-cardiac-ct-predicts-severe-coronary-stenosis-in-lesions-with-moderate-to-severe-calcification
#10
Mengmeng Yu, Yuehua Li, Wenbin Li, Zhigang Lu, Meng Wei, Jiayin Zhang
OBJECTIVES: To assess the diagnostic performance of the calcification remodeling index (RI) as assessed by coronary computed tomography angiography (coronary CTA) to predict the presence of severe coronary stenosis in atherosclerotic coronary lesions with moderate to severe calcification. METHODS: Patients who underwent coronary CTA and invasive coronary angiography (ICA) within one month and had moderately to severely calcified lesions as revealed by coronary CTA, were retrospectively included...
September 30, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28987749/different-manifestation-of-irradiation-induced-coronary-artery-disease-detected-with-coronary-computed-tomography-compared-with-matched-non-irradiated-controls
#11
Alexander R van Rosendael, Laurien A Daniëls, Aukelien C Dimitriu-Leen, Jeff M Smit, Philippe J van Rosendael, Martin J Schalij, Jeroen J Bax, Arthur J H A Scholte
BACKGROUND AND PURPOSE: Patients who received chest irradiation for treatment of a malignancy are at increased risk for the development of coronary artery atherosclerosis. Little is known about the anatomical coronary artery plaque characteristics of irradiation induced coronary artery disease (CAD). This study aimed to evaluate potential differences in the presence, extent, severity, composition and location of CAD in patients treated with mediastinal irradiation compared with non-irradiated controls matched on age, gender and cardiovascular risk factors...
October 4, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/28986147/fractional-flow-reserve-derived-from-coronary-computed-tomography-angiography-reclassification-rate-using-value-distal-to-lesion-compared-to-lowest-value
#12
Shaw Hua Kueh, John Mooney, Mickaël Ohana, Ung Kim, Philipp Blanke, Rominder Grover, Stephanie Sellers, Jennifer Ellis, Darra Murphy, Cameron Hague, Jeroen J Bax, Bjarne L Nørgaard, Mark Rabbat, Jonathon A Leipsic
INTRODUCTION: A standardised approach to the interpretation of FFRCT data is currently lacking. We evaluated the rate of reclassification of FFRCT positivity using the FFRCT value distal to an anatomical stenoses compared to the lowest FFRCT value. METHOD: Patients who underwent coronary CTA and FFRCT analysis were eligible. FFRCT value of ≤ 0.80 was considered positive. Positive FFRCT distal to stenosis was defined as those with a stenoses of ≥ 25% with an associated FFRCT value of ≤ 0...
September 21, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28984636/coronary-artery-positive-remodeling-in-current-smokers
#13
Anas Alani, Yanting Luo, Rine Nakanishim, Suguru Matsumoto, Matthew J Budoff
BACKGROUND: This study aims to evaluate the association of the coronary artery-positive remodeling (CAPR) observed on cardiac computed tomography angiography (CCTA) with cigarette smoking. PATIENTS AND METHODS: This retrospective case-control study enrolled 178 consecutive patients with CAPR plaque (case group) and 180 consecutive patients with coronary artery plaque, but no positive remodeling (control group). CAPR was evaluated in CCTA images and defined as at least 10% larger vessel diameter at the plaque site compared with a normal reference segment...
October 3, 2017: Coronary Artery Disease
https://www.readbyqxmd.com/read/28981808/evaluation-of-radiation-absorbed-dose-and-image-quality-in-different-retrospective-ecg-gating-acquisition-methods-of-cardiac-ct-angiography
#14
Shojaei Barjouei Nazli, Seyed Mahmoud Reza Aghamiri, Neda Gholizadeh Sendani, Amin Shams Akhtari
Cardiac computed tomography angiography (CCTA) studies have risen concern of radiobiological effects over the patients. Therefore, estimating radiation doses absorbed during CCTA is important. In this study, we compared radiation dose and image quality by using three different retrospective electrocardiography (ECG) protocols. A total of 123 patients undergoing CCTA were divided in three different groups. We used full-dose modulation (CareDose4D) technique in group (1); fixed tube current 200 mAs for group (2); and in group (3), chest circumference was used to adapt tube current (180-200 mAs) and tube potential (100-120 kVp)...
August 22, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/28977374/incremental-prognostic-value-of-coronary-computed-tomography-angiography-over-coronary-calcium-scoring-for-major-adverse-cardiac-events-in-elderly-asymptomatic-individuals
#15
Donghee Han, Bríain Ó Hartaigh, Heidi Gransar, Ji Hyun Lee, Asim Rizvi, Lohendran Baskaran, Joshua Schulman-Marcus, Allison Dunning, Stephan Achenbach, Mouaz H Al-Mallah, Daniel S Berman, Matthew J Budoff, Filippo Cademartiri, Erica Maffei, Tracy Q Callister, Kavitha Chinnaiyan, Benjamin J W Chow, Augustin DeLago, Martin Hadamitzky, Joerg Hausleiter, Philipp A Kaufmann, Gilbert Raff, Leslee J Shaw, Todd C Villines, Yong-Jin Kim, Jonathon Leipsic, Gudrun Feuchtner, Ricardo C Cury, Gianluca Pontone, Daniele Andreini, Hugo Marques, Ronen Rubinshtein, Niree Hindoyan, Erica C Jones, Millie Gomez, Fay Y Lin, Hyuk-Jae Chang, James K Min
Aims: Coronary computed tomography angiography (CCTA) and coronary artery calcium score (CACS) have prognostic value for coronary artery disease (CAD) events beyond traditional risk assessment. Age is a risk factor with very high weight and little is known regarding the incremental value of CCTA over CAC for predicting cardiac events in older adults. Methods and results: Of 27 125 individuals undergoing CCTA, a total of 3145 asymptomatic adults were identified...
July 20, 2017: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/28975887/quality-assurance-of-the-western-denmark-heart-registry-a-population-based-healthcare-register
#16
Linda Aagaard Rasmussen, Hans Erik Bøtker, Lisette Okkels Jensen, Jan Ravkilde, Lars Riber, Per Hostrup Nielsen, Jan Jesper Andreasen, Carl-Johan Jakobsen
INTRODUCTION: During the past decade, the mandatory population-based healthcare database, the Western Denmark Heart Registry (WDHR), has provided the data for several research projects. As in most clinical registries, the data quality has not been validated thoroughly. This study was undertaken to evaluate the quality of registrations in the WDHR. METHODS: The audit supervised procedures from involved departments that were performed in 2013. An experienced research nurse completed data collection, and an experienced consultant evaluated the agreement between the WDHR and patient records...
October 2017: Danish Medical Journal
https://www.readbyqxmd.com/read/28973101/coronary-computed-tomography-angiography-vs-functional-stress-testing-for-patients-with-suspected-coronary-artery-disease-a-systematic-review-and-meta-analysis
#17
Andrew J Foy, Sanket S Dhruva, Brandon Peterson, John M Mandrola, Daniel J Morgan, Rita F Redberg
Importance: Coronary computed tomography angiography (CCTA) is a new approach for the diagnosis of anatomical coronary artery disease (CAD), but it is unclear how CCTA performs compared with the standard approach of functional stress testing. Objective: To compare the clinical effectiveness of CCTA with that of functional stress testing for patients with suspected CAD. Data Sources: A systematic literature search was conducted in PubMed and MEDLINE for English-language randomized clinical trials of CCTA published from January 1, 2000, to July 10, 2016...
October 2, 2017: JAMA Internal Medicine
https://www.readbyqxmd.com/read/28966320/association-of-dyslipidemia-and-sex-with-coronary-artery-calcium-assessed-by-coronary-computed-tomography-angiography
#18
Masahiko Asami, Kyohei Yamaji, Jiro Aoki, Shuzou Tanimoto, Mika Watanabe, Yu Horiuchi, Koichi Furui, Nahoko Kato, Kazuhiro Hara, Kengo Tanabe
Previous studies reporting that statin increases coronary artery calcium (CAC) were conducted exclusively on patients with statin as a prevention, regardless of the presence or absence of dyslipidemia. The impact of sex on CAC has not been fully evaluated. We aimed to determine the association of dyslipidemia and sex with CAC using 320-row multi-detector computed tomography (MDCT).Of the 356 consecutive patients who underwent coronary MDCT, 251 patients were enrolled, after excluding those with prior stenting and/or coronary bypass grafting or images showing motion artifacts...
September 30, 2017: International Heart Journal
https://www.readbyqxmd.com/read/28964751/feasibility-and-safety-of-augmented-reality-glass-for-computed-tomography-assisted-percutaneous-revascularization-of-coronary-chronic-total-occlusion-a-single-center-prospective-pilot-study
#19
Maksymilian P Opolski, Artur Debski, Bartosz A Borucki, Adam D Staruch, Cezary Kepka, Jakub K Rokicki, Bartosz Sieradzki, Adam Witkowski
BACKGROUND: Percutaneous coronary intervention (PCI) of chronic total occlusion (CTO) may be facilitated by projection of coronary computed tomography angiography (CTA) datasets in the catheterization laboratory. There is no data on the feasibility and safety outcomes of CTA-assisted CTO PCI using a wearable augmented-reality glass. METHODS: A total of 15 patients scheduled for elective antegrade CTO intervention were prospectively enrolled and underwent preprocedural coronary CTA...
September 21, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28956734/coronary-artery-disease-analysis-of-diagnostic-performance-of-ct-perfusion-and-mr-perfusion-imaging-in-comparison-with-quantitative-coronary-angiography-and-spect-multicenter-prospective-trial
#20
Matthias Rief, Marcus Y Chen, Andrea L Vavere, Benjamin Kendziora, Julie M Miller, W Patricia Bandettini, Christopher Cox, Richard T George, João Lima, Marcelo Di Carli, Michail Plotkin, Elke Zimmermann, Michael Laule, Peter Schlattmann, Andrew E Arai, Marc Dewey
Purpose To compare the diagnostic performance of stress myocardial computed tomography (CT) perfusion with that of stress myocardial magnetic resonance (MR) perfusion imaging in the detection of coronary artery disease (CAD). Materials and Methods All patients gave written informed consent prior to inclusion in this institutional review board-approved study. This two-center substudy of the prospective Combined Noninvasive Coronary Angiography and Myocardial Perfusion Imaging Using 320-Detector Row Computed Tomography (CORE320) multicenter trial included 92 patients (mean age, 63...
September 25, 2017: Radiology
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