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Cardiac computed tomography angiography

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https://www.readbyqxmd.com/read/28100426/ferumoxytol-mra-for-transcatheter-aortic-valve-replacement-planning-with-renal-insufficiency
#1
Kimberly Kallianos, Travis S Henry, Yerem Yeghiazarians, Jeffrey Zimmet, Kendrick A Shunk, Elaine E Tseng, Vaikom Mahadevan, Michael D Hope
BACKGROUND: Computed tomography angiography (CTA) is the test of choice for pre-procedure imaging of transcatheter aortic valve replacement (TAVR) candidates. The iodinated contrast required, however, increases the risk of renal dysfunction in patients with pre-existing renal failure. Ferumoxytol is a magnetic resonance imaging (MRI) contrast agent that can be used with renal failure. Its long vascular resonance time allows gated MRA sequences that approach CTA in image quality. We present respiratory and cardiac gated MRA enabled by ferumoxytol that can be post-processed in an analogous fashion to CTA...
December 30, 2016: International Journal of Cardiology
https://www.readbyqxmd.com/read/28081050/white-paper-of-the-society-of-computed-body-tomography-and-magnetic-resonance-on-dual-energy-ct-part-3-vascular-cardiac-pulmonary-and-musculoskeletal-applications
#2
Carlo N De Cecco, U Joseph Schoepf, Lynne Steinbach, Daniel T Boll, W Dennis Foley, Ravi K Kaza, David N Bolus, Desiree E Morgan, Dushyant V Sahani, William P Shuman, Marilyn J Siegel, Terri J Vrtiska, Benjamin M Yeh, Lincoln L Berland
This is the third of a series of 4 white papers that represent Expert Consensus Documents developed by the Society of Computed Body Tomography and Magnetic Resonance through its Task Force on dual-energy computed tomography. This paper, part 3, describes computed tomography angiography and thoracic, cardiac, vascular, and musculoskeletal clinical applications. At the end of the discussion of each application category (vascular, cardiac, pulmonary, and musculoskeletal), we present our consensus opinions on the current clinical utility of the application and opportunities for further research...
January 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28074983/-role-of-coronary-computed-tomography-angiography-for-the-diagnosis-of-coronary-anomalies
#3
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
#4
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/28049537/imperforated-cor-triatriatum-dexter-in-a-dog-with-concurrent-caudal-vena-cava-wall-mineralization
#5
Tetyda Paulina Dobak, Gregory Starrak, Kathleen Linn, Elisabeth Christine Roberston Snead
BACKGROUND: Cor triatriatum dexter (CTD) is a rare congenital cardiac malformation with various manifestations and has been sporadically described in dogs. Clinically the dogs present with nonspecific signs of right heart failure or Budd-Chiari-like syndrome. Other associated concurrent cardiovascular anomalies are commonly reported. Diagnosis and full characterization of this complex malformation requires careful investigation and often a multimodal imaging approach. CASE PRESENTATION: A 10-week-old, male intact, Golden Retriever was presented with clinical signs of stunted growth, anorexia, and progressive ascites...
January 3, 2017: Acta Veterinaria Scandinavica
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
#6
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
#7
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/28033607/extracorporeal-membrane-oxygenation-in-adults-variants-complications-during-therapy-and-the-role-of-radiological-imaging
#8
Laura Beck, Matthias C Burg, Walter Heindel, Christoph Schülke
Background Extracorporeal membrane oxygenation (ECMO) and extracorporeal life support (ECLS) as respiratory and circulatory assist therapies are gaining in importance in the treatment of critically ill patients. Depending on the place of cannulation - veno-venous for ECMO and veno-arterial for ECLS - distinct changes in hemodynamics will occur. In this review we describe the different types of ECMO and ECLS systems, the typical cannula placement and frequent complications under therapy. The most suitable imaging modalities will be presented and typical hemodynamic pitfalls in contrast-enhanced computed tomography or angiography will be elucidated...
December 29, 2016: RöFo: Fortschritte Auf Dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
https://www.readbyqxmd.com/read/28031682/diagnosing-left-coronary-ostial-atresia-sometimes-the-old-ways-are-best
#9
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
#10
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/28027742/prognostic-value-of-ct-derived-left-atrial-and-left-ventricular-measures-in-patients-with-acute-chest-pain
#11
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/27999461/radial-artery-pseudoaneurysm-with-aberrant-radial-artery-anatomy-an-unusual-presentation-of-flexor-tenosynovitis
#12
Nicholas A Calotta, Megan E Gornet, Edward F McCarthy, Donna Magid, E Gene Deune
Purpose Radial artery pseudoaneurysm is uncommon and mainly associated with radial artery cannulization for cardiac intervention or invasive hemodynamic monitoring. It is rarely seen as a result of intra-arterial recreational drug injection. Methods We present the case of a 35-year-old man with a 12-year history of intravenous drug use and 1-year history of intra-arterial drug use who developed radial artery pseudoaneurysm with a right long finger suppurative flexor tenosynovitis and subsequent acute radial-sided hand ischemia...
December 2016: Journal of Hand and Microsurgery
https://www.readbyqxmd.com/read/27966335/radiation-dose-to-breasts-from-a-cardiac-computed-tomography-angiographyscanogram-can-be-reduced-by-switching-tube-position
#13
Mustafa Erdem Sağsöz, Rüstem Berhan Pirimoğlu
BACKGROUND/AIM: In a computed tomography (CT) examination, scanogram images are used to determine the range of the area to be imaged before scanning. The importance of scanogram image exposure has increased since total examination radiation has decreased due to technological advancements. The purpose of this study was to determine and compare radiation doses delivered to patients while the tube was in anterior-posterior (AP) and posterior-anterior (PA) positions during a CT angiography scanogram...
November 17, 2016: Turkish Journal of Medical Sciences
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
#14
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
#15
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
https://www.readbyqxmd.com/read/27909280/-cardiac-failure-developing-eleven-years-after-coronary-artery-bypass-grafting-report-of-a-case
#16
Shingo Taguchi, Takashi Hachiya, Katsuhisa Onoguchi, Makoto Hanai, Makoto Sumi, Masataka Yamazaki, Masahito Yamashiro
We report a rare case of cardiac failure for intrapericardial hematoma 11 years after coronary artery bypass grafting. A 59-year-old man was admitted to our hospital with cardiac tamponade. Echocardiography and computed tomography scan showed severe compression of the left ventricle(LV) by a large mass sized about 5×8 cm. Coronary angiography showed total occlusion at circumflex branch (Cx) #11. The mass was diagnosed with intrapericardial hematoma. We performed removal of hematoma in the pericardial cavity, and removed hematoma had 126 g...
December 2016: Kyobu Geka. the Japanese Journal of Thoracic Surgery
https://www.readbyqxmd.com/read/27908971/13n-ammonia-pet-ct-detection-of-myocardial-perfusion-abnormalities-in-beagle-dogs-after-local-heart-irradiation
#17
Jianbo Song, Rui Yan, Zhifang Wu, Jianguo Li, Min Yan, Xinzhong Hao, Jianzhong Liu, Sijin Li
: To determine the potential value of (13)N-ammonia positron emission tomography (PET)/computed tomography (CT) myocardial perfusion imaging (MPI) for detection of myocardial perfusion changes at early stage induced by radiation damage. METHODS: Thirty-six Beagle dogs were randomly divided into the control (n = 18) or the irradiation groups (n = 18). The irradiation group underwent local irradiation to the left ventricular anterior cardiac wall with a single dose of 20 Gy, whereas the control group received sham irradiation...
December 1, 2016: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/27903485/endovascular-repair-of-thoraco-abdominal-aortic-aneurysm-in-high-surgical-risk-patients-fenestrated-and-branched-endografts
#18
E Gallitto, M Gargiulo, A Freyrie, C Bianchini Massoni, R Pini, C Mascoli, G L Faggioli, S Ancetti, A Stella
AIM: To report early and mid-term results of endovascular repair of thoraco-abdominal aneurysms (TAAA) by using of Cook-Zenith fenestrated/branched endografts (FB-EVAR) in high-surgical risk patients unfit for open repair (OR). METHODS: Between January 2012 and April 2015, all the patients with TAAA, considered at high-surgical risk for OR and treated by Cook-Zenith FB-EVAR, were prospectively enrolled. Patients were studied using a thoraco-abdominal computer tomography angiography (CTA) and dedicated software for advanced vessels analysis...
November 26, 2016: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/27899941/influence-of-increased-epicardial-adipose-tissue-volume-on-1-year-in-stent-restenosis-in-patients-who-received-coronary-stent-implantation
#19
Ying Zhou, Hua-Wei Zhang, Feng Tian, Jin-Song Chen, Tian-Wen Han, Ya-Hang Tan, Jia Zhou, Tao Zhang, Jing Jing, Yun-Dai Chen
BACKGROUND: Epicardial adipose tissue (EAT) is significantly associated with the formation and composition of coronary atherosclerotic plaque, cardiac events and the clinical prognosis of coronary heart disease. But, whether increased EAT deposition may affect the incidence of in-stent restenosis (ISR) is currently unclear. This study used coronary computed tomography angiography (CCTA) as a mean to investigate whether increased EAT volume was associated with ISR. METHODS: A total of 364 patients who underwent 64-slice CCTA examination for the evaluation of suspected coronary artery disease, and subsequently underwent percutaneous coronary intervention (PCI) for the first time, and then accepted coronary angiography (CA) follow-up for ISR examination in one year, were retrospectively included in this study...
September 2016: Journal of Geriatric Cardiology: JGC
https://www.readbyqxmd.com/read/27899867/a-very-rare-case-of-co-existence-of-cor-triatriatum-sinister-and-left-pulmonary-vein-atresia
#20
Mustafa Aparci, Murat Yalcin, Zafer Isilak, Mehmet Dogan, Ejder Kardesoglu
Cor triatriatum sinister (CTS) is a rare congenital abnormality. Clinical presentation of patients with CTS mainly depends on the anatomic features of membrane and may vary from mild or moderate symptoms mimicking mitral stenosis to more severe and complicated cardioembolic stroke or a new onset heart failure. We herein have reported on a young male who presented with the signs and symptoms of mitral stenosis and was diagnosed as CTS with gradient on the orifice of the membrane after transthrocacic echocardiography...
November 2016: Acta Cardiologica Sinica
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