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https://www.readbyqxmd.com/read/28448411/image-quality-and-radiation-exposure-comparison-of-a-double-high-pitch-acquisition-for-coronary-computed-tomography-angiography-versus-standard-retrospective-spiral-acquisition-in-patients-with-atrial-fibrillation
#1
Carlos Eduardo Elias Dos Prazeres, Tiago Augusto Magalhães, Adriano Camargo de Castro Carneiro, Roberto Caldeira Cury, Valéria de Melo Moreira, Juliana Hiromi Silva Matsumoto Bello, Carlos Eduardo Rochitte
OBJECTIVE: The aim of this study was to compare image quality and radiation dose of coronary computed tomography (CT) angiography performed with dual-source CT scanner using 2 different protocols in patients with atrial fibrillation. METHODS: Forty-seven patients with AF underwent 2 different acquisition protocols: double high-pitch (DHP) spiral acquisition and retrospective spiral acquisition. The image quality was ranked according to a qualitative score by 2 experts: 1, no evident motion; 2, minimal motion not influencing coronary artery luminal evaluation; and 3, motion with impaired luminal evaluation...
April 26, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28446943/the-updated-nice-guidelines-cardiac-ct-as-the-first-line-test-for-coronary-artery-disease
#2
REVIEW
Alastair J Moss, Michelle C Williams, David E Newby, Edward D Nicol
PURPOSE OF REVIEW: Cost-effective care pathways are integral to delivering sustainable healthcare programmes. Due to the overestimation of coronary artery disease using traditional risk tables, non-invasive testing has been utilised to improve risk stratification and initiate appropriate management to reduce the dependence on invasive investigations. In line with recent technological improvements, cardiac CT is a modality that offers a detailed anatomical assessment of coronary artery disease comparable to invasive coronary angiography...
2017: Current Cardiovascular Imaging Reports
https://www.readbyqxmd.com/read/28446942/cardiac-ct-improves-outcomes-in-stable-coronary-heart-disease-results-of-recent-clinical-trials
#3
REVIEW
Michelle C Williams, Alastair Moss, Edward Nicol, David E Newby
PURPOSE OF REVIEW: The purpose of this study was to review the recent randomised controlled trials of coronary computed tomography angiography (CCTA) for patients with stable coronary artery disease. RECENT FINDINGS: The initial results and subsequent papers from the SCOT-HEART (Scottish COmputed Tomography of the HEART) and PROMISE (PROspective Multicentre Imaging Study for Evaluation of chest pain) trials have shown that CCTA is a safe and appropriate addition to standard care or alternative to functional testing...
2017: Current Cardiovascular Imaging Reports
https://www.readbyqxmd.com/read/28446550/national-institute-for-health-and-care-excellence-updates-the-stable-chest-pain-guideline-with-radical-changes-to-the-diagnostic-paradigm
#4
REVIEW
Adam Timmis, Carl A Roobottom
In the 2016 update of the stable chest pain guideline, the National Institute for Health and Care Excellence (NICE) has made radical changes to the diagnostic paradigm that it-like other international guidelines-had previously placed at the centre of its recommendations. No longer are quantitative assessments of the disease probability considered necessary to determine the need for diagnostic testing and the choice of test. Instead, the recommendation is for no diagnostic testing if chest pain is judged to be 'non-anginal' and CT coronary angiography (CTCA) in patients with 'typical' or 'atypical' chest pain with additional perfusion imaging only if there is uncertainty about the functional significance of coronary lesions...
April 26, 2017: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/28446549/management-of-coronary-artery-disease-with-cardiac-ct-beyond-gatekeeping
#5
EDITORIAL
Filippo Cademartiri, Stefano Nistri, Giuseppe Tarantini, Erica Maffei
No abstract text is available yet for this article.
April 26, 2017: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/28445682/atrial-fibrillation-diagnostic-accuracy-of-coronary-ct-angiography-performed-with-a-whole-heart-230-%C3%A2%C2%B5m-spatial-resolution-ct-scanner
#6
Daniele Andreini, Gianluca Pontone, Saima Mushtaq, Edoardo Conte, Marco Perchinunno, Marco Guglielmo, Valentina Volpato, Andrea Annoni, Andrea Baggiano, Alberto Formenti, Maria Elisabetta Mancini, Virginia Beltrama, Valentina Ditali, Alessandro Campari, Cesare Fiorentini, Antonio L Bartorelli, Mauro Pepi
Purpose To assess image quality, interpretability, diagnostic accuracy, and radiation exposure of a computed tomography (CT) scanner with 16-cm coverage and 230-µm spatial resolution at coronary artery evaluation in patients with atrial fibrillation (AF) by using invasive coronary angiography (ICA) as the reference method and to compare the results with those obtained in patients with sinus rhythm (SR). Materials and Methods Written informed consent and institutional ethics committee approval were obtained...
April 26, 2017: Radiology
https://www.readbyqxmd.com/read/28444153/computed-tomography-derived-fractional-flow-reserve-testing-in-stable-patients-with-typical-angina-pectoris-influence-on-downstream-rate-of-invasive-coronary-angiography
#7
Jesper Møller Jensen, Hans Erik Bøtker, Ole Norling Mathiassen, Erik Lerkevang Grove, Kristian Altern Øvrehus, Kamilla Bech Pedersen, Christian Juhl Terkelsen, Evald Høj Christiansen, Michael Maeng, Jonathon Leipsic, Anne Kaltoft, Lars Jakobsen, Jacob Thorsted Sørensen, Troels Thim, Steen Dalby Kristensen, Lars Romer Krusell, Bjarne Linde Nørgaard
Aims: To assess the use of downstream coronary angiography (ICA) and short-term safety of frontline coronary CT angiography (CTA) with selective CT-derived fractional flow reserve (FFRCT) testing in stable patients with typical angina pectoris. Methods and results: Between 1 January 2016 and 30 June 2016 all patients (N = 774) referred to non-emergent ICA or coronary CTA at Aarhus University Hospital on a suspicion of CAD had frontline CTA performed. Downstream testing and treatment within 3 months and adverse events ≥90 days were registered...
April 20, 2017: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/28442659/diagnostic-accuracy-of-endocardial-to-epicardial-myocardial-blood-flow-ratio-for-the-detection-of-significant-coronary-artery-disease-with-dynamic-myocardial-perfusion-dual-source-computed-tomography
#8
Yoshitaka Goto, Kakuya Kitagawa, Mio Uno, Shiro Nakamori, Tatsuro Ito, Naoki Nagasawa, Kaoru Dohi, Hajime Sakuma
BACKGROUND: Previous dynamic stress computed tomography perfusion (CTP) studies used absolute myocardial blood flow (MBF in mL/100 g/min) as a threshold to discriminate flow-limiting coronary artery disease (CAD), but absolute MBF can be vary because of multiple factors. The aim of this study was to compare the diagnostic performance of absolute MBF and the transmural perfusion ratio (TPR) for the detection of flow-limiting CAD, and to clarify the influence of CT delayed enhancement (CTDE) on the diagnostic performance of CTP...
April 25, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28437443/relative-predictive-value-of-lung-cancer-screening-ct-versus-myocardial-perfusion-attenuation-correction-ct-in-the-evaluation-of-coronary-calcium
#9
Grant Bailey, Abigail Healy, Bryan D Young, Esseim Sharma, Judith Meadows, Hyung J Chun, Wen-Chih Wu, Gaurav Choudhary, Alan R Morrison
Coronary artery calcium scores (CACS) from lung cancer screening computed tomography (LCSCT) or myocardial perfusion attenuation correction computed tomography (ACCT) are not routinely performed or reported. CACS from LCSCT and ACCT have not been directly compared in the same patient population. We identified 66 patients who underwent both LCSCT (non-gated) and ECG-gated cardiac CT (CCT) within a 2-year span. Of this population, 40 subjects had also undergone ACCT. Using the Agatston method, CACS for 264 individual vessels from the LCSCT population and for 160 vessels from ACCT population were calculated and evaluated for agreement with ECG-gated CCT as the gold standard...
2017: PloS One
https://www.readbyqxmd.com/read/28432820/the-impact-of-small-motion-on-the-visualization-of-coronary-vessels-and-lesions-in-cardiac-ct-a-simulation-study
#10
Francisco Contijoch, J Webster Stayman, Elliot R McVeigh
PURPOSE: Coronary x-ray computed tomography angiography (CCTA) is used to non-invasively assess coronary artery geometry and has, combined with computational modeling, demonstrated the potential to identify physiologically significant lesions. These measurements require robust and accurate coronary imaging and delineation of vessels in the presence of small motion. This simulation study characterizes the impact of small, uncorrected vessel drifts during data acquisition on the assessment of vessel intensity, diameter, and shape...
April 22, 2017: Medical Physics
https://www.readbyqxmd.com/read/28431861/cardiac-computed-tomography-derived-myocardial-mass-at-risk-using-the-voronoi-based-segmentation-algorithm-a-histological-validation-study
#11
Seiko Ide, Satoru Sumitsuji, Osamu Yamaguchi, Yasushi Sakata
BACKGROUND: Myocardial mass at risk (MMAR) is an important predictor of adverse cardiac events in patients with ischemic heart disease. This study aims to validate the accuracy of MMAR calculated from cardiac computed tomography (CCT) data using the Voronoi-based segmentation algorithm in comparison with actual MMAR measured on ex-vivo swine hearts prepared by injecting a dye into the coronary arteries. METHODS: Fifteen extracted swine hearts had India ink injected into one of the major coronary arteries...
April 18, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28420590/volume-and-dimensions-of-angiographically-normal-coronary-arteries-assessed-by-multidetector-computed-tomography
#12
Samuel Kiil Sørensen, Jørgen Tobias Kühl, Andreas Fuchs, Jakob Boesgaard Norsk, Lars Valeur Køber, Børge Grønne Nordestgaard, Klaus Fuglsang Kofoed
BACKGROUND: The objective of this study was to determine normal values for coronary artery volume (CAV) and individual vasculature and segment dimensions. METHODS: We examined 200 healthy volunteers with an Agatston score of 0 and a normal, high quality coronary CTA. Using 320 slice multidetector row CT and designated vessel tracing software with border detection algorithm, the main coronary arteries and branches were delineated and total and segmental dimensions calculated...
April 4, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28416984/the-inferior-displacement-of-the-his-bundle-and-fast-pathway-in-a-patient-with-common-type-atrioventricular-nodal-tachycardia-three-dimensional-computed-tomography-analysis
#13
Kunihiko Kiuchi, Koji Fukuzawa, Mori Shumpei, Tatsuya Nishii
A 66-year-old woman with palpitations was referred to our center for catheter ablation due to drug-refractory, common type atrioventricular nodal tachycardia (AVNRT). A selective slow pathway ablation was attempted. A fast junctional rhythm with transient ventriculoatrial block followed by transient prolongation of the A-H interval occurred immediately after the radiofrequency (RF) application at the coronary sinus ostium (CSOS) level. To assess the location of the fast pathway and His bundle, we sought to visualize the anatomy of the triangle of Koch (TOK) by three-dimensional computed tomography (CT)...
April 2017: Journal of Arrhythmia
https://www.readbyqxmd.com/read/28416589/multimodality-imaging-of-the-tricuspid-valve-with-implication-for-percutaneous-repair-approaches
#14
REVIEW
Francesco Ancona, Stefano Stella, Maurizio Taramasso, Claudia Marini, Azeem Latib, Paolo Denti, Francesco Grigioni, Maurice Enriquez-Sarano, Ottavio Alfieri, Antonio Colombo, Francesco Maisano, Eustachio Agricola
Nowadays some percutaneous options for tricuspid valve (TV) repair are available: Tricinch (4Tech Cardio, Galway, Ireland) mimicking the Kay procedure, Trialign (Mitralign, Boston, MA, USA) aiming to bicuspidise TV, MitraClip (Abbott Vascular, Abbott Park, Illinois, USA) mimicking Alfieri's stitch, direct transcatheter annuloplasty with Cardioband (Valtech Cardio, Or Yehuda, Israel) and transcatheter Forma Repair (Edwards Lifesciences, Irvine, California, USA) providing a surface for leaflet coaptation. A multimodality imaging approach is fundamental for defining the pathophysiology of tricuspid regurgitation (TR), preprocedural planning and intraprocedural monitoring...
April 17, 2017: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/28414687/disseminated-cryptococcal-disease-with-diffuse-pulmonary-infiltrates-in-a-non-hiv-host
#15
M Hughes, K Trivedi, M Rudrappa
INTRODUCTION: We present a case of disseminated Cryptococcus in a non-HIV host, where the primary manifestation was pulmonary with diffuse pulmonary infiltrates. This patient was on high dose corticosteroids for autoimmune hemolytic anemia. CASE: A 79 year old Caucasian man with a history of autoimmune hemolytic anemia on 100 mg of prednisone daily, coronary artery disease s/p bypass surgery, ischemic cardiomyopathy, chronic obstructive pulmonary disease, sleep apnea, chronic kidney disease, and history of bilateral pulmonary emboli presented to Hematology/Oncology clinic with symptoms of productive cough, worsening shortness of breath, hemoptysis...
March 2017: Journal of the Louisiana State Medical Society: Official Organ of the Louisiana State Medical Society
https://www.readbyqxmd.com/read/28414663/not-another-acs-rule-out
#16
S Preston, R Nelson, M Watts, D Smith, T Dewenter, D Spruill
CASE: A 50 year old African-American woman with diabetes, hypertension, and hyperlipidemia presented with progressively worsening retro-sternal chest pain, exacerbated by activity and relieved by rest. She also endorsed a thirty-pound unintentional weight loss, and dysphagia. She was dysarthric with left-sided Bell's Palsy and a palpable left axillary lymph node. She had been evaluated at several hospitals in the previous months for similar typical chest pain. Her troponin values were normal, and an EKG showed T-wave inversions in leads I and aVL...
March 2017: Journal of the Louisiana State Medical Society: Official Organ of the Louisiana State Medical Society
https://www.readbyqxmd.com/read/28413071/performance-of-ultra-low-dose-ct-for-the-evaluation-of-coronary-calcification-a-direct-comparison-with-coronary-calcium-score
#17
V V Silveira de Souza, F Soares Torres, B Hochhegger, G Watte, G Sartori, F Lucchese, B Azambuja Gonçalves
AIM: To evaluate the diagnostic performance of ultra-low-dose computed tomography (ULDCT) in comparison to standard coronary calcium score (CCS) acquisition for the evaluation of coronary artery calcification (CAC). MATERIALS AND METHODS: Standard CCS acquisition and ULDCT were performed in patients referred for coronary CT angiography for the evaluation of coronary artery disease. CAC in ULDCT was graded subjectively using a four-point scale (from 0, no calcification, to 3, severe calcification) for the complete study and for each individual coronary segment...
April 13, 2017: Clinical Radiology
https://www.readbyqxmd.com/read/28412436/noninvasive-ffr-derived-from-coronary-ct-angiography-management-and-outcomes-in-the-promise-trial
#18
Michael T Lu, Maros Ferencik, Rhonda S Roberts, Kerry L Lee, Alexander Ivanov, Elizabeth Adami, Daniel B Mark, Farouc A Jaffer, Jonathon A Leipsic, Pamela S Douglas, Udo Hoffmann
OBJECTIVES: The purpose of this study was to determine whether noninvasive fractional flow reserve derived from computed tomography (FFRCT) predicts coronary revascularization and outcomes and whether its addition improves efficiency of referral to invasive coronary angiography (ICA) after coronary computed tomography angiography (CTA). BACKGROUND: FFRCT may improve the efficiency of an anatomic CTA strategy for stable chest pain. METHODS: This observational cohort study included patients with stable chest pain in the PROMISE trial (PROspective Multicenter Imaging Study for Evaluation of Chest Pain) referred to ICA within 90 days after CTA...
April 7, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28411031/prognostic-value-of-visually-detected-coronary-artery-calcification-on-unenhanced-non-gated-thoracic-computed-tomography-for-prediction-of-non-fatal-myocardial-infarction-and-all-cause-mortality
#19
Lisa Shao, Andrew T Yan, Gerald Lebovic, Harvey H Wong, Anish Kirpalani, Djeven P Deva
PURPOSE: To determine the prognostic value of visually detected coronary artery calcification (CAC) on unenhanced non-gated thoracic computed tomography (CT) for non-fatal myocardial infarction (MI) and all-cause mortality. METHODS: This retrospective single-centre cohort study comprised of 410 consecutive patients aged 40-80 years without any known cardiovascular disease at baseline. CT images without electrocardiogram-gating were acquired for a variety of respiratory medicine indications...
March 28, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28409258/impact-of-knowledge-based-iterative-model-reconstruction-on-myocardial-late-iodine-enhancement-in-computed-tomography-and-comparison-with-cardiac-magnetic-resonance
#20
Yuki Tanabe, Teruhito Kido, Akira Kurata, Naoki Fukuyama, Takahiro Yokoi, Tomoyuki Kido, Teruyoshi Uetani, Mani Vembar, Amar Dhanantwari, Shinichi Tokuyasu, Natsumi Yamashita, Teruhito Mochizuki
We evaluated the image quality and diagnostic performance of late iodine enhancement computed tomography (LIE-CT) with knowledge-based iterative model reconstruction (IMR) for the detection of myocardial infarction (MI) in comparison with late gadolinium enhancement magnetic resonance imaging (LGE-MRI). The study investigated 35 patients who underwent a comprehensive cardiac CT protocol and LGE-MRI for the assessment of coronary artery disease. The CT protocol consisted of stress dynamic myocardial CT perfusion, coronary CT angiography (CTA) and LIE-CT using 256-slice CT...
April 13, 2017: International Journal of Cardiovascular Imaging
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