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Coronary cardiac computed tomography

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https://www.readbyqxmd.com/read/28074983/-role-of-coronary-computed-tomography-angiography-for-the-diagnosis-of-coronary-anomalies
#1
Rienzi Díaz, Jorge Vega
BACKGROUND: Coronary anomalies are rare heart diseases that can cause sudden cardiac death, especially in young individuals. Coronary computed tomography angiography delivers a three-dimensional view of excellent quality with information of the origin, course and anatomic relationships of the anomalous vessel, allowing differentiation between benign and malignant variants, entities that require different management and treatment. AIM: To show that coronary computed tomography angiography is the non-invasive technique of choice for the evaluation of a coronary anomaly due to its high diagnostic accuracy...
October 2016: Revista Médica de Chile
https://www.readbyqxmd.com/read/28070049/-common-factors-for-ischemic-cerebral-stroke-in-coronary-artery-bypass-grafting-in-patients-with-concomitant-carotid-and-coronary-artery-severe-stenosis
#2
Lei Huang, Feng Kuang, Zhonggui Shan, Yiquan Lai, Hongwei Guo
To analyze two common factors for perioperative ischemic stroke in patients with concomitant carotid and coronary artery severe stenosis and to improve the therapeutic effect.
 Methods: A total of 44 patients with multi-vessel coronary artery disease combined with carotid stenosis, who admitted to the Department of Cardiac Surgery, the First Affiliated Hospital of Xiamen University from 2008 to 2014, were enrolled in this study. Among them, 32 cases were male, 12 cases was female. All patients received coronary artery bypass grafting after treatment of neck diseases...
December 28, 2016: Zhong Nan da Xue Xue Bao. Yi Xue Ban, Journal of Central South University. Medical Sciences
https://www.readbyqxmd.com/read/28069008/accuracy-of-echocardiographic-area-length-method-in-chronic-myocardial-infarction-comparison-with-cardiac-ct-in-pigs
#3
Haitham Ballo, Miikka Tarkia, Matti Haavisto, Christoffer Stark, Marjatta Strandberg, Tommi Vähäsilta, Virva Saunavaara, Tuula Tolvanen, Mika Teräs, Ville-Veikko Hynninen, Timo Savunen, Anne Roivainen, Juhani Knuuti, Antti Saraste
BACKGROUND: We evaluated echocardiographic area-length methods to measure left ventricle (LV) volumes and ejection fraction (EF) in parasternal short axis views in comparison with cardiac computed tomography (CT) in pigs with chronic myocardial infarction (MI). METHODS: Male farm pigs with surgical occlusion of the left anterior descending coronary artery (n = 9) or sham operation (n = 5) had transthoracic echocardiography and cardiac-CT 3 months after surgery...
January 9, 2017: Cardiovascular Ultrasound
https://www.readbyqxmd.com/read/28050865/creation-and-characterization-of-normal-myocardial-perfusion-imaging-databases-using-the-iq%C3%A2-spect-system
#4
Koichi Okuda, Kenichi Nakajima, Shinro Matsuo, Chisato Kondo, Masayoshi Sarai, Yoriko Horiguchi, Takahiro Konishi, Masahisa Onoguchi, Takeshi Shimizu, Seigo Kinuya
BACKGROUND: Image acquisition by short-time single-photon emission-computed tomography (SPECT) has been made feasible by IQ·SPECT. The aim of this study was to generate normal databases (NDBs) of thallium-201 ((201)Tl) myocardial perfusion imaging for IQ·SPECT, and characterize myocardial perfusion distribution. METHODS AND RESULTS: We retrospectively enrolled 159 patients with a low likelihood of cardiac diseases from four hospitals in Japan. All patients underwent short-time (201)Tl myocardial perfusion IQ·SPECT with or without attenuation and scatter correction (ACSC) in either supine or prone position...
January 3, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28047187/tu-h-campus-iep2-03-development-of-3d-printed-coronary-phantoms-for-in-vitro-ct-ffr-validation-using-data-from-320-detector-row-coronary-ct-angiography
#5
C Ionita, E Angel, D Mitsouras, S Rudin, D Bednarek, S Zaid, M Wilson, F Rybicki
PURPOSE: To validate Computed Tomography Fractional Flow Reserve (CT-FFR) measurements with accurate 3D printed coronary phantoms. METHODS: DICOM data from four phases in two patients imaged with a standard 320 × 0.5mm coronary CT acquisition (70-80% cardiac cycle) underwent semi-automated segmentation using a research workstation. Both patients had a >50% stenosis from the clinical image interpretation. Each volume was saved as a Stereo Lithographic (STL) file with 250 micron resolution...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047154/su-f-t-405-development-of-a-rapid-cardiac-contouring-tool-using-landmark-driven-modeling
#6
C Pelletier, E Mosher, C Lee, C Lee, J Jung
PURPOSE: This study aims to develop a tool to rapidly delineate cardiac substructures for use in dosimetry for large-scale clinical trial or epidemiological investigations. The goal is to produce a system that can semi-automatically delineate nine cardiac structures to a reasonable accuracy within a couple of minutes. METHODS: The cardiac contouring tool employs a Most Similar Atlas method, where a selection criterion is used to pre-select the most similar model to the patient from a library of pre-defined atlases...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28031682/diagnosing-left-coronary-ostial-atresia-sometimes-the-old-ways-are-best
#7
Steven Karayiannis, Brian Anthony McCrossan, Andrew Sands
A 12-year-old boy with intermittent syncope associated with exercise. Exercise stress testing suggested myocardial ischemia and 2D echocardiography failed to confirm antegrade flow in the left main stem. Advanced imaging techniques including cardiac-gated computed tomography angiography and stress cardiac magnetic resonance imaging were falsely reassuring. Cardiac catheterization demonstrated left coronary artery ostial atresia with a good caliber left coronary system supplied by generous collaterals from the right coronary artery...
December 2016: International Journal of Angiology: Official Publication of the International College of Angiology, Inc
https://www.readbyqxmd.com/read/28027746/image-quality-of-ct-angiography-using-model-based-iterative-reconstruction-in-infants-with-congenital-heart-disease-comparison-with-filtered-back-projection-and-hybrid-iterative-reconstruction
#8
Qianjun Jia, Jian Zhuang, Jun Jiang, Jiahua Li, Meiping Huang, Changhong Liang
PURPOSE: To compare the image quality, rate of coronary artery visualization and diagnostic accuracy of 256-slice multi-detector computed tomography angiography (CTA) with prospective electrocardiographic (ECG) triggering at a tube voltage of 80kVp between 3 reconstruction algorithms (filtered back projection (FBP), hybrid iterative reconstruction (iDose(4)) and iterative model reconstruction (IMR)) in infants with congenital heart disease (CHD). METHODS: Fifty-one infants with CHD who underwent cardiac CTA in our institution between December 2014 and March 2015 were included...
January 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28027743/igg4-related-cardiovascular-disease-the-emerging-role-of-cardiovascular-imaging
#9
REVIEW
Sophie Mavrogeni, George Markousis-Mavrogenis, Genovefa Kolovou
Immunoglobulin 4-related disease (IgG4-related disease) is a systemic inflammatory disease that presents with increases of serum IgG4. It may affect various systems, including the cardiovascular (CV) system. Assessment of serum IgG4 levels and involved organ biopsy are necessary for diagnosis. IgG4-related disease is characterized by fibrosclerosis, lymphocytic infiltration and presence of IgG4-positive plasma cells. The disease usually responds to treatment with corticosteroids and/or immunosuppressive medication...
January 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28027742/prognostic-value-of-ct-derived-left-atrial-and-left-ventricular-measures-in-patients-with-acute-chest-pain
#10
Richard A P Takx, Rozemarijn Vliegenthart, U Joseph Schoepf, John W Nance, Fabian Bamberg, Joseph A Abro, Christine M Carr, Sheldon E Litwin, Paul Apfaltrer
PURPOSE: To determine which left atrial (LA) and left ventricular (LV) parameters are associated with future major adverse cardiac event (MACE) and whether these measurements have independent prognostic value beyond risk factors and computed tomography (CT)-derived coronary artery disease measures. MATERIALS AND METHODS: This retrospective analysis was performed under an IRB waiver and in HIPAA compliance. Subjects underwent coronary CT angiography (CCTA) using a dual-source CT system for acute chest pain evaluation...
January 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28019054/interatrial-block-and-interatrial-septal-thickness-in-patients-with-paroxysmal-atrial-fibrillation-undergoing-catheter-ablation-long-term-follow-up-study
#11
Enes E Gul, Raveen Pal, Jane Caldwell, Usama Boles, Wilma Hopman, Benedict Glover, Kevin A Michael, Damian Redfearn, Chris Simpson, Hoshiar Abdollah, Adrian Baranchuk
BACKGROUND: Interatrial block (IAB) is a strong predictor of recurrence of atrial fibrillation (AF). IAB is a conduction delay through the Bachman region, which is located in the upper region of the interatrial space. During IAB, the impulse travels from the right atrium to the interatrial septum (IAS) and coronary sinus to finally reach the left atrium in a caudocranial direction. No relation between the presence of IAB and IAS thickness has been established yet. OBJECTIVE: To determine whether a correlation exists between the degree of IAB and the thickness of the IAS and to determine whether IAS thickness predicts AF recurrence...
December 25, 2016: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28012444/carotid-artery-plaques-and-intima-medial-thickness-in-familial-hypercholesteraemic-patients-on-long-term-statin-therapy-a-case-control-study
#12
Sven Bos, Martijne H C Duvekot, Gert-Jan R Ten Kate, Adrie J M Verhoeven, Monique T Mulder, Arend F L Schinkel, Koen Nieman, Gerald F Watts, Eric J G Sijbrands, Jeanine E Roeters van Lennep
BACKGROUND AND AIMS: Statins reduce subclinical atherosclerosis and premature atherosclerotic cardiovascular disease (ASCVD) in patients with familial hypercholesterolemia (FH). However, some FH patients still develop ASCVD despite statin therapy. We compared subclinical atherosclerosis assessed by carotid plaque presence and intima media thickness (C-IMT), in long-term statin-treated FH patients and healthy controls. Furthermore, we analysed whether carotid ultrasonography findings associated with subclinical coronary atherosclerosis...
December 2, 2016: Atherosclerosis
https://www.readbyqxmd.com/read/28010914/reconstructions-using-rif-in-motion-mapping-technique-have-substantially-less-arrhythmogenic-artifacts-in-dual-source-coronary-cta
#13
Sebastian Daniel Reinartz, Markus Winkler, Sascha B Diefenbach, Thomas Allmendinger, Tobias Penzkofer, Christiane K Kuhl, Andreas H Mahnken
RATIONALE AND OBJECTIVES: Particularly for patients with heart arrhythmias, conventional BestSystole (BS) and BestDiastole (BD) reconstruction techniques in computed tomography (CT) frequently show artifacts that hinder the readability of the coronary tree. To address this problem, this paper presents an alternative reconstruction method that combines the technique "reconstructions with identical filling" (RIF) with motion mapping: This new technique is called "RIF in motion mapping" (RIMM)...
December 20, 2016: Academic Radiology
https://www.readbyqxmd.com/read/28007496/cardiovascular-health-metrics-among-south-asian-adults-in-the-united-states-prevalence-and-associations-with-subclinical-atherosclerosis
#14
Sameera A Talegawkar, Yichen Jin, Namratha R Kandula, Alka M Kanaya
South Asians, a fast growing ethnic group in the US, have an increased risk for cardiovascular disease compared to the general population. We examined the prevalence and distribution of the American Heart Association's Life's Simple 7 cardiovascular health (CVH) metrics using data from Mediators of Atherosclerosis in South Asians Living in America (MASALA) study, and cross-sectional associations between number of CVH metrics in the ideal range with subclinical atherosclerosis assessed using coronary artery calcium (CAC) measured using cardiac computed tomography and carotid intima media thickness (CIMT) measured using high-resolution B-mode ultrasonography...
December 20, 2016: Preventive Medicine
https://www.readbyqxmd.com/read/27987279/falsely-elevated-troponin-rare-occurrence-or-future-problem
#15
James Nguyen, Rosy Thachil, Neil Vyas, Thomas Marino
INTRODUCTION: Troponins are known to be released in response to cardiac damage and therefore are the biomarkers of choice for the early diagnosis of acute myocardial infarction (AMI), improving outcome in patients presenting with chest pain. However, false results can occur due to interference from other substances in the blood. CASE: A 52-year-old male with a past medical history of alcohol abuse, hypertension, and coronary artery bypass graft at age 34 with normal stress test 2 years before presented to the emergency department (ED) complaining of 1 day of non-exertional chest pain with radiation to the neck and left arm...
2016: Journal of Community Hospital Internal Medicine Perspectives
https://www.readbyqxmd.com/read/27986261/accuracy-and-radiation-dose-reduction-using-low-voltage-computed-tomography-coronary-artery-calcium-scoring-with-tin-filtration
#16
Christian Tesche, Carlo N De Cecco, Rozemarijn Vliegenthart, Moritz H Albrecht, Akos Varga-Szemes, Taylor M Duguay, Ullrich Ebersberger, Richard R Bayer, Christian Canstein, Bernhard Schmidt, Thomas Allmendinger, Sheldon E Litwin, Pamela B Morris, Thomas G Flohr, Ellen Hoffmann, U Joseph Schoepf
This study prospectively investigated the accuracy and radiation dose reduction of CT coronary artery calcium scoring (CACS) using a 100 kVp acquisition protocol with tin filtration (Sn100 kVp) compared with the standard 120 kVp acquisition protocol; 70 patients (59% men, 62.1 ± 10.7 years) who underwent a clinically indicated CACS acquisition using the standard 120 kVp protocol on a third-generation dual-source CT system were enrolled. An additional Sn100 kVp CACS scan was performed. Agatston scores and categories, percentile-based risk categorization, and radiation dose estimates were derived from 120 and Sn100 kVp studies and compared...
November 16, 2016: American Journal of Cardiology
https://www.readbyqxmd.com/read/27981817/intracardiac-thrombus-in-beh%C3%A3-et-s-disease
#17
I Ben Ghorbel, N Belfeki, M H Houman
Behçet's disease (BD) is a multisystem inflammatory disorder. Intracardiac thrombus (ICT) formation is an uncommon but important complication of BD. Of the cases of Behçet's disease, we selected those with ICT. All patients fulfilled the diagnostic criteria of the International Study Group of Behçet's disease. The ICT in each case was confirmed by ultrasonography, computed tomography and MRI. Clinical features and laboratory parameters were determined. Among our 518 patients with BD, 8 were diagnosed as having intracardiac thrombus (ICT)...
December 16, 2016: Reumatismo
https://www.readbyqxmd.com/read/27974951/automated-agatston-score-computation-in-a-large-dataset-of-non-ecg-gated-chest-computed-tomography
#18
Germán González, George R Washko, Raúl San José Estépar
The Agatston score, computed from ECG-gated computed tomography (CT), is a well established metric of coronary artery disease. It has been recently shown that the Agatston score computed from chest CT (non ECG-gated) studies is highly correlated with the Agatston score computed from cardiac CT scans. In this work we present an automated method to compute the Agatston score from chest CT images. Coronary arteries calcifications (CACs) are defined as voxels contained within the coronary arteries with a value greater or equal to 130 Hounsfield Units (HU)...
April 2016: Proceedings of the IEEE International Symposium on Biomedical Imaging: from Nano to Macro
https://www.readbyqxmd.com/read/27941018/prognostic-assessment-of-stable-coronary-artery-disease-as-determined-by-coronary-computed-tomography-angiography-a-danish-multicentre-cohort-study
#19
Lene H Nielsen, Hans Erik Bøtker, Henrik T Sørensen, Morten Schmidt, Lars Pedersen, Niels Peter Sand, Jesper M Jensen, Flemming H Steffensen, Hans Henrik Tilsted, Morten Bøttcher, Axel Diederichsen, Jess Lambrechtsen, Lone D Kristensen, Kristian A Øvrehus, Hans Mickley, Henrik Munkholm, Ole Gøtzsche, Majed Husain, Lars L Knudsen, Bjarne L Nørgaard
AIMS: To examine the 3.5 year prognosis of stable coronary artery disease (CAD) as assessed by coronary computed tomography angiography (CCTA) in real-world clinical practice, overall and within subgroups of patients according to age, sex, and comorbidity. METHODS AND RESULTS: This cohort study included 16,949 patients (median age 57 years; 57% women) with new-onset symptoms suggestive of CAD, who underwent CCTA between January 2008 and December 2012. The endpoint was a composite of late coronary revascularization procedure >90 days after CCTA, myocardial infarction, and all-cause death...
December 9, 2016: European Heart Journal
https://www.readbyqxmd.com/read/27909513/assessment-of-sinoatrial-node-function-in-patients-with-persistent-and-long-standing-persistent-forms-of-atrial-fibrillation-after-maze-iii-procedure-combined-with-mitral-valve-operation
#20
Kulikov Aleksei A, Bokeria Leo A
RESEARCH OBJECTIVE: Assessment of sinoatrial node function after Maze III procedure combined with a mitral valve operation. METHODS: 100 patients were included in the research with persistent and long-standing persistent forms of atrial fibrillation (AF) and need of operative treatment concerning valve disease. The following preoperative preparation methods were executed to all patients: Electrocardiogram in 12 standard assignments;Two-dimensional echocardiographic with assessment of systolic and diastolic functions of the left ventricle, size of the left atrium and grade of valve disease;Transesophageal echocardiography for exclusion of blood clots in the left atrium and left atrial appendage;Coronary angiography for exclusion of coronary heart disease;Computer tomography for examination of cardiac chambers and anatomic characteristics of pulmonary veins...
June 2016: Journal of Atrial Fibrillation
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