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Computed coronary angiography

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https://www.readbyqxmd.com/read/28738000/comparison-of-cardiac-output-measured-by-use-of-computed-tomography-and-thermodilution-in-dogs
#1
Sharon Tenenbaum, Fernando L Garcia-Pereira, Clifford R Berry, Tori Obert
OBJECTIVE To compare cardiac output (CO) measured by use of CT coronary angiography and thermodilution (criterion-referenced standard) at various CO values, record adverse effects, and determine the time needed to measure CO. ANIMALS 5 healthy purpose-bred Beagles (2 males and 3 females). PROCEDURES A prospective nonrandomized crossover study was conducted. Dogs were premedicated with butorphanol tartrate (0.2 mg•kg(-1), IM). Anesthesia was induced by IV administration of etomidate (1 to 2 mg•kg(-1)) and midazolam (0...
August 2017: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/28734923/diagnostic-accuracy-of-coronary-ct-angiography-for%C3%A2-the-evaluation-of-bioresorbable-vascular-scaffolds
#2
Carlos Collet, Bernard Chevalier, Angel Cequier, Jean Fajadet, Marcello Dominici, Steffen Helqvist, A J Van Boven, Dariusz Dudek, Dougal McClean, Manuel Almeida, Jan J Piek, Erhan Tenekecioglu, Antonio Bartorelli, Stephan Windecker, Patrick W Serruys, Yoshinobu Onuma
OBJECTIVES: To assess the diagnostic accuracy of coronary computed tomography angiography (CTA) for bioresorbable vascular scaffold (BVS) evaluation. BACKGROUND: Coronary CTA has emerged as a noninvasive method to evaluate patients with suspected or established coronary artery disease. The diagnostic accuracy of coronary CTA to evaluate angiographic outcomes after BVS implantation has not been well established. METHODS: In the ABSORB II (A Bioresorbable Everolimus-Eluting Scaffold Versus a Metallic Everolimus-Eluting Stent II) study, patients were randomized either to receive treatment with the BVS or everolimus-eluting metallic stent...
July 13, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28729409/comparison-of-anatomic-and-clinical-outcomes-in-patients-undergoing-alternative-initial-noninvasive-testing-strategies-for-the-diagnosis-of-stable-coronary-artery-disease
#3
Idan Roifman, Harindra C Wijeysundera, Peter C Austin, Mohammad R Rezai, Graham A Wright, Jack V Tu
BACKGROUND: The optimal initial noninvasive diagnostic testing strategy for stable coronary artery disease (CAD) is unknown. Although American guidelines recommend an exercise stress test as the first-line test, European guidelines suggest that stress imaging (myocardial perfusion imaging or stress echocardiography) or coronary computed tomography angiography may be preferable. Understanding the relationship between the initial strategy and downstream yield of obstructive CAD and major adverse cardiac events may provide insight as to the optimal strategy...
July 19, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28728443/functional-assessment-of-coronary-artery-disease-by-cardiac-computed-tomography
#4
T A Treibel, A Rossi, F Pugliese, C Davies
Rapid technological advances in computed tomography (CT) have allowed CT coronary angiography (CTCA) to be delivered at low radiation dose and high diagnostic accuracy. Due to its high negative predictive value for coronary artery disease, it has become a gatekeeper for the assessment of patients with chest pain of recent onset. Second line functional assessment of a detected coronary stenosis relies mostly on other imaging modalities. Functional assessment of coronary artery disease by CT is therefore an attractive addition to CTCA...
July 21, 2017: Expert Review of Cardiovascular Therapy
https://www.readbyqxmd.com/read/28726114/sex-related-differences-in-serum-matrix-metalloproteinase-9-screening-non-calcified-and-mixed-coronary-atherosclerotic-plaques-in-outpatients-with-chest-pain
#5
Chun Gu, Fang Wang, Zhihui Hou, Bin Lv, Yang Wang, Xiangfeng Cong, Xi Chen
The objective of this study is to evaluate the clinical feasibility of serum matrix metalloproteinase-9 (MMP-9) for screening plaque composition as assessed by coronary computed tomography angiography (CCTA) in outpatients with chest pain,and the effects of sex on this feasibility. Eight hundred and sixty-two consecutive outpatients with chest pain were divided into three groups according to the results of CCTA: non-plaque (NP, n = 474), calcified plaques (CPs, n = 179), non-calcified and mixed plaques (NCPs and MPs, n = 209)...
July 19, 2017: Heart and Vessels
https://www.readbyqxmd.com/read/28725938/declining-radiation-dose-of-coronary-computed-tomography-angiography-german-cardiac-ct-registry-experience-2009-2014
#6
Axel Schmermund, Mohamed Marwan, Jörg Hausleiter, Sebastian Barth, Oliver Bruder, Sebastian Kerber, Grigorius Korosoglou, Alexander Leber, Werner Moshage, Stephen Schröder, Steffen Schneider, Jochen Senges, Stephan Achenbach
BACKGROUND: Coronary computed tomography angiography (CTA) is increasingly used as a test to rule out coronary artery disease (CAD) in patients with a low to intermediate pre-test probability of the disease. We used the database of the German CT registry, collected between 2009 and 2014 in a broad patient population, to analyze contemporary radiation dose associated with coronary CTA in clinical practice. PATIENTS AND METHODS: The prospective observational registry included a total of 7061 patients ≥18 years, referred to 12 participating centers for a clinically indicated cardiac CT examination...
July 19, 2017: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
https://www.readbyqxmd.com/read/28721152/clinical-syntax-score-a-good-predictor-for-renal-artery-stenosis-in-acute-myocardial-infarction-patients-analysis-from-the-ren-acs-trial
#7
Alexandru Burlacu, Dimitrie Siriopol, Ionut Nistor, Luminita Voroneanu, Igor Nedelciuc, Cristian Statescu, Adrian Covic
INTRODUCTION: In ST-elevation myocardial infarction (STEMI) patients, multisite artery disease represents a serious issue influencing evolution, outcomes and prognosis. We evaluated for the first time the power of the Myocardial Infarction SYNTAX Score (MI SS) and Clinical SYNTAX Score (MI CSS) as predictors for renal artery stenosis (RAS) in STEMI. We also stratified the study population according to the two scores, and identified the variables correlated with the higher score. MATERIAL AND METHODS: We used data from the REN-ACS study, which included 181 consecutive patients prospectively investigated for presence of RAS (through renal angiography), arterial stiffness (carotid-femoral pulse wave velocity, cf-PWV) and hydration status (bioimpedance)...
June 2017: Archives of Medical Science: AMS
https://www.readbyqxmd.com/read/28719492/fifty-men-3510-marathons-cardiac-risk-factors-and-coronary-artery-calcium-scores
#8
William O Roberts, Robert S Schwartz, Ross F Garberich, Samantha Carlson, Thomas Knickelbine, Jonathan G Schwartz, Gretchen Peichel, John R Lesser, Kelly Wickstrom, Kevin M Harris
INTRODUCTION/PURPOSE: Many male marathon runners have elevated coronary artery calcium (CAC) scores despite high physical activity. We examined the association between CAC scores, cardiovascular risk factors, and lifestyle habits in long term marathoners. METHODS: We recruited men who had run ≥1 marathon annually for 25 consecutive years. CAC was assessed using coronary computed tomography angiography. Atherosclerotic cardiovascular disease (CAD) risk factors were measured with a 12-lead ECG, serum lipid panel, height, weight, resting blood pressure and heart rate, and a risk factor questionnaire...
July 17, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28718051/coronary-heart-disease-preoperative-gesture-interactive-diagnostic-system-based-on-augmented-reality
#9
Yi-Bo Zou, Yi-Min Chen, Ming-Ke Gao, Quan Liu, Si-Yu Jiang, Jia-Hui Lu, Chen Huang, Ze-Yu Li, Dian-Hua Zhang
Coronary heart disease preoperative diagnosis plays an important role in the treatment of vascular interventional surgery. Actually, most doctors are used to diagnosing the position of the vascular stenosis and then empirically estimating vascular stenosis by selective coronary angiography images instead of using mouse, keyboard and computer during preoperative diagnosis. The invasive diagnostic modality is short of intuitive and natural interaction and the results are not accurate enough. Aiming at above problems, the coronary heart disease preoperative gesture interactive diagnostic system based on Augmented Reality is proposed...
August 2017: Journal of Medical Systems
https://www.readbyqxmd.com/read/28712701/impact-of-advanced-modeled-iterative-reconstruction-on-interreader-agreement-in-coronary-artery-measurements
#10
Tobias Gassenmaier, Isabel Distelmaier, Andreas M Weng, Thorsten A Bley, Thorsten Klink
OBJECTIVES: To evaluate the influence of advanced modeled iterative reconstruction (ADMIRE) on coronary artery computed tomography angiography (cCTA) measurements in comparison to filtered back projection (FBP). MATERIAL AND METHODS: Phantom scans and coronary CTA studies of 27 patients were acquired with a third generation dual-source CT scanner. Images were reconstructed using FBP and ADMIRE. Phantom measurements were used as reference standard. In patient studies, representative axial slices of each coronary artery segment without (n=308) and with coronary plaques (n=40) were assessed in identical positions for comparison of FBP and ADMIRE reconstructions...
July 1, 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28711588/a-framework-for-computational-fluid-dynamic-analyses-of-patient-specific-stented-coronary-arteries-from-optical-coherence-tomography-images
#11
Susanna Migliori, Claudio Chiastra, Marco Bologna, Eros Montin, Gabriele Dubini, Cristina Aurigemma, Roberto Fedele, Francesco Burzotta, Luca Mainardi, Francesco Migliavacca
The clinical challenge of percutaneous coronary interventions (PCI) is highly dependent on the recognition of the coronary anatomy of each individual. The classic imaging modality used for PCI is angiography, but advanced imaging techniques that are routinely performed during PCI, like optical coherence tomography (OCT), may provide detailed knowledge of the pre-intervention vessel anatomy as well as the post-procedural assessment of the specific stent-to-vessel interactions. Computational fluid dynamics (CFD) is an emerging investigational tool in the setting of optimization of PCI results...
July 12, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28708755/computed-tomography-coronary-angiography-with-heart-rate-control-premedication-a-best-practice-implementation-project
#12
Gordon Thomas Waterland Mander
BACKGROUND: Computed tomography coronary angiography patient preparation with heart rate control premedication is employed in departments across Australia. However, the methods of administration vary widely between institutions and do not always follow best practice. OBJECTIVES: This aim of the study was to identify and promote best practice in the administration of heart rate premedication in computed tomography coronary angiography at a regional hospital in Australia...
July 2017: JBI Database of Systematic Reviews and Implementation Reports
https://www.readbyqxmd.com/read/28708724/impact-of-ssf-on-diagnostic-performance-of-coronary-computed-tomography-angiography-within-1-heart-beat-in-patients-with-high-heart-rate-using-a-256-row-detector-computed-tomography
#13
Junfu Liang, Hui Wang, Lei Xu, Li Dong, Zhanming Fan, Rui Wang, Zhonghua Sun
OBJECTIVE: The aim of this study was to investigate the impact of a motion-correction algorithm on diagnostic accuracy of coronary computed tomography angiography (CCTA) within 1 heart beat in patients with high heart rate (HR) using a 256-row detector CT. METHOD: Sixty-four consecutive patients with known or suspected coronary artery disease (symptomatic) and with HR of 75 beats per minute or greater (mean [SD] HR, 82.6 [7.3] beats per minute) undergoing CCTA and invasive coronary angiography within 4 weeks were prospectively enrolled...
July 13, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28708716/the-influence-of-contrast-agent-s-osmolarity-on-iodine-delivery-protocol-in-coronary-computed-tomography-angiography-comparison-between-iso-osmolar-iodixanol-320-and-low-osmolar-iomeprol-370
#14
Xiaohan Yang, Weiwei Huang, Wangyan Liu, Yinsu Zhu, Yi Xu, Guanyu Yang, Lijun Tang, Xiaomei Zhu
OBJECTIVES: This study aims to assess whether iodine-contained contrast agents with different osmolarity affect iodine delivery protocol during coronary computed tomography angiography (CCTA). METHODS: Patients who underwent CCTA were randomized to receive contrast media either iodixanol-320 (iso-osmolar group) or iopromide-370 (low-osmolar group). Contrast protocols were recorded. Tube voltage of 100 kV was chosen for patients with body mass index of less than or equal to 25 (n = 224) and tube voltage of 120 kV for patients with body mass index of greater than 25 (n = 165)...
July 13, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28707212/automatic-evaluation-of-vessel-diameter-variation-from-2d-x-ray-angiography
#15
Faten M'hiri, Luc Duong, Christian Desrosiers, Nagib Dahdah, Joaquim Miró, Mohamed Cheriet
PURPOSE: Early detection of blood vessel pathologies can be made through the evaluation of functional and structural abnormalities in the arteries, including the arterial distensibility measure. We propose a feasibility study on computing arterial distensibility automatically from monoplane 2D X-ray sequences for both small arteries (such as coronary arteries) and larger arteries (such as the aorta). METHODS: To compute the distensibility measure, three steps were developed: First, the segment of an artery is extracted using our graph-based segmentation method...
July 13, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28703931/rationale-and-design-of-a-randomized-trial-of-apixaban-vs-warfarin-to-evaluate-atherosclerotic-calcification-and-vulnerable-plaque-progression
#16
Kazuhiro Osawa, Rine Nakanishi, Theingi Tiffany Win, Dong Li, Sina Rahmani, Negin Nezarat, Nasim Sheidaee, Matthew J Budoff
Vitamin K antagonists (VKAs) are known to increase vascular calcification, suggesting increased cardiovascular disease events. Apixaban is an oral direct factor Xa inhibitor superior to warfarin at preventing stroke or systemic embolism and may stabilize coronary atherosclerosis. The potential benefits of avoiding VKA therapy and the favorable effects of factor Xa inhibitors could contribute to cardiovascular disease event reduction. We hypothesized that apixaban inhibits vascular calcification and coronary atherosclerosis progression compared with warfarin in patients with atrial fibrillation (AF)...
July 13, 2017: Clinical Cardiology
https://www.readbyqxmd.com/read/28699019/the-diagnostic-performance-of-spect-mpi-to-predict-functional-significant-coronary-artery-disease-by-fractional-flow-reserve-derived-from-ccta-ffrct-sub-analysis-from-accuracy-and-vct001-studies
#17
Rine Nakanishi, Kazuhiro Osawa, Indre Ceponiene, Glenn Huth, Jason Cole, Michael Kim, Negin Nezarat, Sina Rahmani, Dong Li, Souma Gupta, Campbell Rogers, Christopher Dailing, Matthew J Budoff
Although single photon emission computed tomography-myocardial perfusion image (SPECT-MPI) and fractional flow reserve (FFR) derived from coronary computed tomographic angiography (CCTA) (FFRCT) have permitted functional assessment of coronary artery disease (CAD), the concordance between these modalities has not been well described. The aim of this study is to compare SPECT-MPI and anatomical stenosis by CCTA and invasive coronary angiography to FFRCT for assessing functional significance of CAD. We identified 62 patients with suspected CAD who underwent ≥64 slice coronary CTA and SPECT-MPI within 3 months...
July 11, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28696872/anomalous-aortic-origin-of-a-coronary-artery-symptoms-do-not-correlate-with-intramural-length-or-ostial-diameter
#18
Shyamasundar Balasubramanya, Michael C Mongé, Osama M Eltayeb, Anne E Sarwark, John M Costello, Cynthia K Rigsby, Andrada R Popescu, Carl L Backer
BACKGROUND: Anomalous aortic origin of a coronary artery (AAOCA) is a known cause of sudden death. Our hypothesis was that longer intramural length and smaller ostial diameter correlate with preoperative symptoms. If true, this would assist in the decision for surgical indications. We also assessed the accuracy of preoperative imaging to predict intramural length. METHODS: Retrospective analysis of patients who underwent AAOCA unroofing from 2006 to 2014. Patients had preoperative computed tomography angiography (CTA) or magnetic resonance imaging (MRI)...
July 2017: World Journal for Pediatric & Congenital Heart Surgery
https://www.readbyqxmd.com/read/28693906/reproducible-computer-assisted-quantification-of-myocardial-perfusion-with-contrast-enhanced-ultrasound
#19
Yuanwei Li, Navtej Chahal, Roxy Senior, Meng-Xing Tang
Myocardial perfusion can be quantified by myocardial contrast echocardiography (MCE) and is used for the diagnosis of coronary artery disease (CAD). However, existing MCE quantification software is highly operator dependent and has poor reproducibility and ease of usage. The aim of this study was to develop robust and easy-to-use software that can perform MCE quantification accurately, reproducibly and rapidly. The developed software has the following features: (i) semi-automatic segmentation of the myocardium; (ii) automatic rejection of MCE data with poor image quality; (iii) automatic computation of perfusion parameters such as myocardial blood flow (MBF)...
July 7, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28690294/unusual-coronary-sinus-tumor-in-a-pregnant-woman
#20
Guang Song, Jing Liu, Baosheng Guo, Feifei Sun, Weidong Ren, Fangfang Li, Wanying Huang
Primary coronary sinus tumors are extremely rare. Herein, we present a case of a pregnant woman with a primary myxoma in the coronary sinus (CS), which was diagnosed by echocardiography and computed tomography. We reviewed the literature and found two other primary CS tumors. We summarized the gender, ages, symptoms, diagnostic methods, associated anomalies, treatments, histologic findings, and outcomes of the 3 cases. Dyspnea was a common symptom of all 3 patients. Diagnostic methods included echocardiography, computed tomography, magnetic resonance imaging, and coronary angiography...
July 10, 2017: International Heart Journal
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