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Computed coronary angiography

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https://www.readbyqxmd.com/read/28231322/clinical-evaluation-of-new-automatic-coronary-specific-best-cardiac-phase-selection-algorithm-for-single-beat-coronary-ct-angiography
#1
Hui Wang, Lei Xu, Zhanming Fan, Junfu Liang, Zixu Yan, Zhonghua Sun
The aim of this study was to evaluate the workflow efficiency of a new automatic coronary-specific reconstruction technique (Smart Phase, GE Healthcare-SP) for selection of the best cardiac phase with least coronary motion when compared with expert manual selection (MS) of best phase in patients with high heart rate. A total of 46 patients with heart rates above 75 bpm who underwent single beat coronary computed tomography angiography (CCTA) were enrolled in this study. CCTA of all subjects were performed on a 256-detector row CT scanner (Revolution CT, GE Healthcare, Waukesha, Wisconsin, US)...
2017: PloS One
https://www.readbyqxmd.com/read/28229912/mid-diastolic-left-ventricular-volume-and-mass-normal-values-for-coronary-computed-tomography-angiography
#2
Daniel Juneau, Fernanda Erthal, Owen Clarkin, Atif Alzahrani, Ali Alenazy, Alomgir Hossain, Joao R Inacio, Girish Dwivedi, Alexander J Dick, Frank J Rybicki, Benjamin J W Chow
BACKGROUND: The adoption of prospectively ECG-triggered acquisition coronary computed tomography angiography (CTA) has resulted in the inability to measure left ventricle (LV) end-diastolic volume and LV ejection fraction. However other prognostic measures such as LV mass and LV mid-diastolic volume (LVMDV) can still be assessed. The objective of this study is to establish normal reference values for LVMDV and LV mass. METHODS: Left ventricular mid-diastolic volumes and LV mass were prospectively measured in 2647 consecutive 'normal' patients undergoing prospectively ECG-triggered coronary CTA...
February 10, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28229911/diagnostic-accuracy-of-carotid-intima-media-thickness-in-predicting-coronary-plaque-burden-on-coronary-computed-tomography-angiography-in-patients-with-obstructive-sleep-apnoea
#3
David J Murphy, Sophie J Crinion, Ciaran E Redmond, Gerard M Healy, Walter T McNicholas, Silke Ryan, Jonathan D Dodd
AIM: To assess the diagnostic accuracy of common carotid artery intima media thickness (CIMT) for coronary artery disease (CAD) detection in patients with obstructive sleep apnoea (OSA). MATERIALS & METHODS: Patients with clinically suspected OSA prospectively underwent polysomnography (PSG), ultrasound CIMT measurement and coronary computed tomography angiography (CTA). An average CIMT of ≥0.9 mm in either common carotid artery designated as a positive test...
February 11, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28229226/pericoronary-adipose-tissue-ratio-is-a-stronger-associated-factor-of-plaque-vulnerability-than-epicardial-adipose-tissue-on-coronary-computed-tomography-angiography
#4
Ryo Okubo, Rine Nakanishi, Mikihito Toda, Daiga Saito, Ippei Watanabe, Takayuki Yabe, Hideo Amano, Tatsushi Hirai, Takanori Ikeda
This study was designed to clarify the influence of pericoronary adipose tissue (PAT) on plaque vulnerability using coronary computed tomography angiography (CCTA). A total of 103 consecutive patients who underwent CCTA and subsequent percutaneous coronary intervention (PCI) using intravascular ultrasound (IVUS) for coronary artery disease were enrolled. The PAT ratio was calculated as the sum of the perpendicular thickness of the visceral layer between the coronary artery and the pericardium, or the coronary artery and the surface of the heart at the PCI site, divided by the PAT thickness without a plaque in the same vessel...
February 22, 2017: Heart and Vessels
https://www.readbyqxmd.com/read/28228453/impaired-health-status-psychological-distress-and-personality-in-women-and-men-with-nonobstructive-coronary-artery-disease-sex-and-gender-differences-the-twist-tweesteden-mild-stenosis-study
#5
Paula M C Mommersteeg, Lindy Arts, Wobbe Zijlstra, Jos W Widdershoven, Wilbert Aarnoudse, Johan Denollet
BACKGROUND: Patients with nonobstructive coronary artery disease (NOCAD; wall irregularities, stenosis <60%), and women with NOCAD in particular, remain underinvestigated. We examined sex and gender (S&G) differences in health status, psychological distress, and personality between patients with NOCAD and the general population, as well as S&G differences within the NOCAD population. METHODS AND RESULTS: In total, 523 patients with NOCAD (61±9 years, 52% women) were included via coronary angiography and computed tomography as part of the TWIST (Tweesteden Mild Stenosis) study...
February 2017: Circulation. Cardiovascular Quality and Outcomes
https://www.readbyqxmd.com/read/28228312/a-study-of-coronary-artery-variants-and-anomalies-observed-at-a-tertiary-care-armed-forces-hospital-using-64-slice-mdct
#6
Akhilesh Rao, Yayati Pimpalwar, Neha Yadu, R K Yadav
BACKGROUND: Isolated coronary artery anomalies are usually clinically silent and mostly detected incidentally during angiography or autopsy. However, few of them may be implicated in cases of sudden cardiac death even in the absence of additional heart abnormalities. Prior knowledge of such variants and anomalies is necessary for planning various interventional procedures. Multiple detector computed tomography coronary angiography has proved a very useful non-invasive modality in this field given its superiority over conventional coronary angiography in providing detailed coronary artery anatomy...
January 2017: Indian Heart Journal
https://www.readbyqxmd.com/read/28223057/patency-of-saphenous-vein-grafts-using-the-pas-port-system-during-coronary-artery-bypass-surgery
#7
Hiroshi Kubota, Hidehito Endo, Hikaru Ishii, Hiroshi Tsuchiya, Yu Takahashi, Yusuke Inaba, Mio Noma, Akihiro Yoshimoto, Satoshi Higuchi, Hideyasu Kohshoh, Seiichi Taniai, Haruhisa Ishiguro, Hideaki Yoshino, Kenichi Sudo
BACKGROUND: Several proximal anastomosis devices have been developed to shorten the time required for a proximal anastomosis and to avoid aortic cross-/side-clamping during coronary artery bypass grafting. This study retrospectively examined the patency of saphenous vein grafts (SVGs) using the PAS-Port System (Cardia Inc, Redwood City, CA). METHODS: From 2004 to 2014, 451 patients underwent coronary artery bypass graft operations requiring at least 1 proximal anastomosis using a PAS-Port device...
February 18, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28221262/recent-advances-in-computed-tomographic-technology-cardiopulmonary-imaging-applications
#8
Azadeh Tabari, Roberto Lo Gullo, Venkatesh Murugan, Alexi Otrakji, Subba Digumarthy, Mannudeep Kalra
Cardiothoracic diseases result in substantial morbidity and mortality. Chest computed tomography (CT) has been an imaging modality of choice for assessing a host of chest diseases, and technologic advances have enabled the emergence of coronary CT angiography as a robust noninvasive test for cardiac imaging. Technologic developments in CT have also enabled the application of dual-energy CT scanning for assessing pulmonary vascular and neoplastic processes. Concerns over increasing radiation dose from CT scanning are being addressed with introduction of more dose-efficient wide-area detector arrays and iterative reconstruction techniques...
March 2017: Journal of Thoracic Imaging
https://www.readbyqxmd.com/read/28214228/coronary-artery-stent-evaluation-with-model-based-iterative-reconstruction-at-coronary-ct-angiography
#9
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
#10
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
#11
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
#12
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
#13
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
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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/28186443/highly-increased-troponin-i-levels-following-high-intensity-endurance-cycling-may-detect-subclinical-coronary-artery-disease-in-presumably-healthy-leisure-sport-cyclists-the-north-sea-race-endurance-exercise-study-needed-2013
#20
Øyvind Skadberg, Øyunn Kleiven, Magnus Bjørkavoll-Bergseth, Tor Melberg, Rolf Bergseth, Jone Selvåg, Bjørn Auestad, Ole J Greve, Kenneth Dickstein, Torbjørn Aarsland, Stein Ørn
Background Circulating cardiac troponin levels increase following prolonged intense physical exercise. The aim of this study was to identify participants with highly elevated cardiac troponins after prolonged, high intensity exercise, and to evaluate these for subclinical coronary artery disease. Methods and results Ninety-seven recreational cyclists without known cardiovascular disease or diabetes, participating in a 91 km mountain bike race were included, 74 (76%) were males, age: 43 ± 10 years, race duration: 4...
January 1, 2017: European Journal of Preventive Cardiology
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