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cardiac contrast mediums

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https://www.readbyqxmd.com/read/27897030/influence-of-cardiac-motion-on-stent-lumen-visualization-in-third-generation-dual-source-ct-employing-a-pulsatile-heart-model
#1
Nils Petri, Tobias Gassenmaier, Thomas Allmendinger, Thomas Flohr, Wolfram Voelker, Thorsten A Bley
OBJECTIVE: To detect an in-stent restenosis an invasive coronary angiography is commonly performed. Due to the risk associated to this procedure, a non-invasive method to detect or exclude an in-stent restenosis is desirable. The purpose of this study was to evaluate the influence of cardiac motion on stent lumen visibility in a third-generation dual-source CT scanner (SOMATOM Force, Siemens Healthcare, Forchheim, Germany), employing a pulsatile heart model (CoroSim by Mecora). METHODS: Thirteen coronary stents with a diameter of 3...
November 29, 2016: British Journal of Radiology
https://www.readbyqxmd.com/read/27896904/contrast-induced-encephalopathy-following-cardiac-catheterization
#2
Roberto Spina, Neil Simon, Romesh Markus, David Wm Muller, Krishna Kathir
OBJECTIVES: To describe the epidemiology, pathophysiology, clinical presentation, and management of contrast-induced encephalopathy (CIE) following cardiac catheterization. BACKGROUND: CIE is an acute, reversible neurological disturbance directly attributable to the intra-arterial administration of iodinated contrast medium. METHODS: The PubMed database was searched and all cases in the literature were retrieved and reviewed. RESULTS: 52 reports of CIE following cardiac catheterization were found...
November 29, 2016: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/27890105/use-of-postmortem-computed-tomography-angiography-to-detect-vascular-injuries-accompanying-skull-base-fracture
#3
Hikaru Kuninaka, Yoichiro Takahashi, Rie Sano, Keiko Takahashi, Rieko Kubo, Yoshihiko Kominato, Hiroyuki Takei, Susumu Kobayashi, Takehiro Shimada, Hiroyuki Tokue, Sachiko Awata, Satoshi Hirasawa
A 58-year-old woman who had presented for upper gastrointestinal barium examination accidently slipped from the movable bed, and her head became compressed between the end of the bed and the side wall. She suffered massive bleeding from her nose and ear followed by cardiac arrest, and subsequent attempts at cardiopulmonary resuscitation failed. A medicolegal autopsy was performed to reveal the cause of death, as part of the investigation of the accident. During the autopsy, postmortem cerebral CT angiography was carried out by injection of 5% gelatin-barium emulsion as a radiopaque contrast medium into the bilateral common carotid arteries, demonstrating transudation of the contrast medium into the right acoustic meatus and the sphenoidal sinus cavity...
November 2016: Legal Medicine
https://www.readbyqxmd.com/read/27830883/axillary-vein-av-spasm-during-cardiac-implantable-electronic-device-cied-implantation
#4
Roman Steckiewicz, Dariusz Górko, Elżbieta B Świętoń, Grzegorz Szparecki, Przemysław Stolarz
BACKGROUND: The technique of axillary vein (AV) or subclavian vein (SV) puncture has become an important alternative to cephalic vein (CV) cutdown as an approach allowing cardiac lead introduction into the venous system during cardiac implantable electronic device (CIED) implantation procedures. Irrespective of the technique used, the injury associated with lead insertion may induce a reflex venous spasm that can even cause total venous obstruction. In order to assess the incidence of AV spasm during AV puncture, we analyzed a total of 735 (382 in females and 353 in males; mean age 75±11 years) denovo CIED implantation procedures involving transvenous lead insertion conducted between January 2014 and December 2015...
November 10, 2016: Folia Morphologica (Warsz)
https://www.readbyqxmd.com/read/27794025/effect-of-contrast-dose-in-the-quantification-of-myocardial-extra-cellular-volume-in-adenosine-stress-rest-perfusion-cardiac-magnetic-resonance-examinations
#5
Meylin Caballeros, Pablo Bartolomé, Óscar Fernández González, Andreas Greiser, Loreto García Del Barrio, Jesús Pueyo, Gorka Bastarrika
BACKGROUND: Diffuse myocardial fibrosis can be quantified by calculating extra-cellular volume (ECV) from native and post-contrast T1 values using dedicated single bolus contrast medium injection protocols. PURPOSE: To evaluate differences in T1 maps and myocardial ECV measurements in routine stress/rest perfusion cardiovascular magnetic resonance (CMR) examinations after injection of single and double dose of contrast medium. MATERIAL AND METHODS: Thirty-seven consecutive patients (30 men; mean age, 62 ± 13 years) underwent clinically indicated adenosine stress/rest perfusion CMR examination to rule out myocardial ischemia following a conventional split-dose contrast medium injection strategy...
October 28, 2016: Acta Radiologica
https://www.readbyqxmd.com/read/27780673/transluminal-attenuation-gradient-coronary-ct-angiography-on-a-320-mdct-volume-scanner-effect-of-scan-timing-coronary-artery-stenosis-and-cardiac-output-using-a-contrast-medium-flow-phantom
#6
Yoshinori Funama, Daisuke Utsunomiya, Seitaro Oda, Toshiaki Shimonobo, Takeshi Nakaura, Toshifumi Mukunoki, Masafumi Kidoh, Hideaki Yuki, Yasuyuki Yamashita
PURPOSE: Transluminal-attenuation-gradient (TAG) may reflect patient characteristics and physiological parameters. Furthermore, TAG may be affected by factors such as the CT scanner speed, scanning method, scan timing after contrast-medium (CM) injection, and the injection methods. The purpose of our study was to investigate quantitative TAG at different scan timing points after CM injection for coronary CT angiography. MATERIALS AND METHODS: Using a CM flow phantom and two types of connecting tube mimicking 0% and 70% coronary artery stenosis, we performed 320-detector volume scanning...
November 2016: Physica Medica: PM
https://www.readbyqxmd.com/read/27651317/comparative-case-control-analysis-of-a-dedicated-self-expanding-biolimus-a9-eluting-bifurcation-stent-versus-provisional-or-mandatory-side-branch-intervention-strategies-in-the-treatment-of-coronary-bifurcation-lesions
#7
Marc-Alexander Ohlow, Ahmed Farah, Stefan Richter, Mohamad El-Garhy, Hubertus von Korn, Bernward Lauer
BACKGROUND: In a number of coronary bifurcation lesions, both the main vessel and the side branch (SB) need stent coverage. OBJECTIVES: To analyze the procedural performance and the impact on radiation times (RT) and contrast medium consumption (CMC) of the Axxess™ stent system (Biosensors, Switzerland) treating de novo bifurcation lesions (DBL). METHODS: One hundred and ten consecutive prospectively enrolled cases (Axxess Group) and 110 age, sex, and lesion location matched controls undergoing mandatory (Group A, n = 56) or provisional (Group B, n = 54) SB intervention were analyzed...
September 21, 2016: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/27592043/thyroidal-response-following-iodine-excess-for-cardiac-catheterisation-and-intervention-in-early-infancy
#8
Markus-Johann Dechant, Natascha van der Werf-Grohmann, Elena Neumann, Ute Spiekerkoetter, Brigitte Stiller, Jochen Grohmann
BACKGROUND: Cardiac catheterisation requiring the use of contrast medium is increasingly utilised in infants with congenital heart disease. Thyroid function in infants is potentially vulnerable to relatively high doses of iodine. METHODS: Single-centre prospective study of 21 patients (10 neonates, 11 infants) exposed to iodine during cardiac catheterisation. Median age was 30days (1-180), median body weight 3.3kg (1.6-7.0). Serum-levels of thyroid-stimulating hormone (TSH), free triiodothyronine (fT3) and free thyroxine (fT4) were measured at baseline before, and at three different times points after intervention...
November 15, 2016: International Journal of Cardiology
https://www.readbyqxmd.com/read/27553939/low-contrast-medium-volume-third-generation-dual-source-computed-tomography-angiography-for-transcatheter-aortic-valve-replacement-planning
#9
Lloyd M Felmly, Carlo N De Cecco, U Joseph Schoepf, Akos Varga-Szemes, Stefanie Mangold, Andrew D McQuiston, Sheldon E Litwin, Richard R Bayer, Thomas J Vogl, Julian L Wichmann
PURPOSE: To investigate feasibility, image quality and safety of low-tube-voltage, low-contrast-volume comprehensive cardiac and aortoiliac CT angiography (CTA) for planning transcatheter aortic valve replacement (TAVR). MATERIALS AND METHODS: Forty consecutive TAVR candidates prospectively underwent combined CTA of the aortic root and vascular access route (270 mgI/ml iodixanol). Patients were assigned to group A (second-generation dual-source CT [DSCT], 100 kV, 60 ml contrast, 4...
August 23, 2016: European Radiology
https://www.readbyqxmd.com/read/27486321/remote-magnetic-targeting-of-iron-oxide-nanoparticles-for-cardiovascular-diagnosis-and-therapeutic-drug-delivery-where-are-we-now
#10
REVIEW
Michael Bietenbeck, Anca Florian, Cornelius Faber, Udo Sechtem, Ali Yilmaz
Magnetic resonance imaging (MRI) allows for an accurate assessment of both functional and structural cardiac parameters, and thereby appropriate diagnosis and validation of cardiovascular diseases. The diagnostic yield of cardiovascular MRI examinations is often increased by the use of contrast agents that are almost exclusively based on gadolinium compounds. Another clinically approved contrast medium is composed of superparamagnetic iron oxide nanoparticles (IONs). These particles may expand the field of contrast-enhanced cardiovascular MRI as recently shown in clinical studies focusing on acute myocardial infarction (AMI) and atherosclerosis...
2016: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/27468705/the-impact-of-operator-experience-during-institutional-adoption-of-trans-radial-cardiac-catheterization
#11
Chetan P Huded, Quentin R Youmans, Ranya N Sweis, Mark J Ricciardi, James D Flaherty
OBJECTIVES: We studied the impact of operator experience on trans-radial (TR) cardiac catheterization performance in contemporary practice. BACKGROUND: TR cardiac catheterization offers advantages over trans-femoral (TF) cardiac catheterization, but the TR approach has been slowly adopted in the United States. METHODS: We reviewed all cases of attempted TR cardiac catheterization at a single tertiary care medical center from May 2008 until April 2015...
July 29, 2016: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/27466865/accuracy-of-intravascular-ultrasound-evaluation-for-the-assessment-of-native-valve-measures-in-patients-undergoing-tavi-preliminary-results
#12
Emanuela de Cillis, Annamaria Dachille, Francesco Giardinelli, Tommaso Acquaviva, Alessandro Santo Bortone
INTRODUCTION: Transcatheter aortic valve implantation (TAVI) technique represents a real revolution in the field of interventional cardiology and medicine, in particular for the treatment of severe aortic valve stenosis in elderly patients or in patients when the periprocedural risk for the traditional surgical option is considered too high, as an alternative to the traditional aortic valve replacement. Although experience on the valves of the last generation is still limited in terms of time, the data currently available are definitely moving in the direction of a minimum hospital mortality (1%) as well as a drastic reduction in the incidence of complications when compared to the devices of the previous generation...
July 29, 2016: Surgical Technology International
https://www.readbyqxmd.com/read/27378561/isolated-disruption-of-the-right-coronary-artery-following-a-steam-pop-during-cavotricuspid-linear-ablation-with-a-contact-force-catheter
#13
Michele Brunelli, Markus Frommhold, Dieter Back, Marco Mierzwa, Bernard Lauer, J Christoph Geller
A 70-year-old woman with persistent atrial fibrillation underwent pulmonary vein isolation and linear ablation with a contact sensor catheter. During cavotricuspid isthmus ablation, a steam pop resulted in cardiac tamponade, and the patient developed severe hypotension despite successful pericardial puncture and minimal residual pericardial effusion. Right coronary artery angiography revealed extravasal contrast medium accumulation posterior of the Crux Cordis. Emergent cardiac surgery confirmed isolated disruption of the artery in the absence of additional heart perforation...
July 2016: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/27331204/taguchi-s-analysis-to-optimize-descending-aortography-for-patent-ductus-arteriosus-with-clinical-verification
#14
Fu Tsai Chiang, Kuang Hua Chu, Ching Yuan Chen, Chien Yi Chen, Lung Kwang Pan
OBJECTIVE: Taguchi's analysis was adopted to optimize the various factors referring to cardiac angiographic examination used to delineating ductus arteriosus in pediatric patients. SUBJECTS AND METHODS: Thirty-six pediatric patients, 9 male and 27 female, mean age of 6.5±4.7yrs, range 0.6 to 16.6 years were included in the study from January 2004 to April 2005. All patients had patent ductus arteriosus (PDA). Taguchi's L9 orthogonal array was used to generate nine different designs of angiographic levels...
May 2016: Hellenic Journal of Nuclear Medicine
https://www.readbyqxmd.com/read/27257865/reduction-of-coronary-motion-artifacts-in-prospectively-electrocardiography-gated-coronary-computed-tomography-angiography-using-monochromatic-imaging-at-various-energy-levels-in-combination-with-a-motion-correction-algorithm-on-single-source-fast-tube-voltage
#15
Haruhiko Machida, Rika Fukui, Jianbo Gao, Isao Tanaka, Yun Shen, Shigeru Suzuki, Takuya Ishikawa, Eiko Ueno
OBJECTIVES: The aim of this study was to assess the effect of monochromatic imaging at various energy levels in combination with a motion correction algorithm (MCA) in single-source dual-energy coronary computed tomography angiography (CCTA) with fast switching of tube voltage on the reduction of coronary motion artifacts (CMA) in a phantom setting. MATERIALS AND METHODS: Using this dual-energy computed tomography technique with a phantom comprising models of coronary vessels filled with contrast medium and pulsating at constant heart rates of 60 to 100 beats per minute, we reconstructed monochromatic images of CCTA obtained at 50 to 90 keV with and without use of MCA...
August 2016: Investigative Radiology
https://www.readbyqxmd.com/read/27190133/haemostasis-with-fibrin-glue-injection-into-the-pericardial-space-for-right-ventricular-perforation-caused-by-an-iatrogenic-procedural-complication
#16
Hirofumi Arai, Takamichi Miyamoto, Nobuhiro Hara, Tohru Obayashi
An 89-year-old woman with severe aortic valve stenosis and bradycardia presented with circulatory shock due to cardiac tamponade. We performed pericardiocentesis, and then diagnosed right ventricular perforation by echocardiography with microcavitation contrast medium just before inserting a drainage tube. We then inserted the drainage tube in the appropriate position and withdrew blood-filled fluid. The patient was haemodynamically stabilised, but haemorrhage from the perforation site continued for a few days...
2016: BMJ Case Reports
https://www.readbyqxmd.com/read/27185221/positive-contrast-cellular-mri-of-embryonic-stem-cells-for-tissue-regeneration-using-a-highly-efficient-t1-mri-contrast-agent
#17
Sadi Loai, Inga Haedicke, Zahra Mirzaei, Craig A Simmons, Xiao-An Zhang, Hai Ling Cheng
PURPOSE: To investigate the feasibility of high-sensitivity cellular MRI of embryonic stem (ES) cells using a novel cell permeable and cell retentive T1 contrast agent. MATERIALS AND METHODS: Mouse ES cells were labeled with a novel manganese porphyrin contrast agent, MnAMP, at 0.1 mM over 2 to 24 h and retained in contrast-free medium for up to 24 h postlabeling. MRI was performed on a 3 Tesla clinical scanner; T1 and T2 relaxation times were measured. Quantification of manganese content was performed using atomic absorption spectroscopy...
December 2016: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/27146030/endometrial-mesenchymal-stem-stromal-cells-their-fibroblast-progeny-in-endometriosis-and-more
#18
Caroline E Gargett, Shanti Gurung
No abstract text is available yet for this article.
June 2016: Biology of Reproduction
https://www.readbyqxmd.com/read/27061253/very-low-intravenous-contrast-volume-protocol-for-computed-tomography-angiography-providing-comprehensive-cardiac-and-vascular-assessment-prior-to-transcatheter-aortic-valve-replacement-in-patients-with-chronic-kidney-disease
#19
Todd C Pulerwitz, Omar K Khalique, Tamim N Nazif, Anna Rozenshtein, Gregory D N Pearson, Rebecca T Hahn, Torsten P Vahl, Susheel K Kodali, Isaac George, Martin B Leon, Belinda D'Souza, Ming Jack Po, Andrew J Einstein
BACKGROUND: Transcatheter aortic valve replacement (TAVR) is a lifesaving procedure for many patients high risk for surgical aortic valve replacement. The prevalence of chronic kidney disease (CKD) is high in this population, and thus a very low contrast volume (VLCV) computed tomography angiography (CTA) protocol providing comprehensive cardiac and vascular imaging would be valuable. METHODS: 52 patients with severe, symptomatic aortic valve disease, undergoing pre-TAVR CTA assessment from 2013-4 at Columbia University Medical Center were studied, including all 26 patients with CKD (eGFR<30 mL/min) who underwent a novel VLCV protocol (20 mL of iohexol at 2...
July 2016: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/27054719/screening-for-unruptured-intracranial-aneurysms-in-autosomal-dominant-polycystic-kidney-disease-a-survey-of-420-nephrologists
#20
Adrien Flahault, Denis Trystram, Marie Fouchard, Bertrand Knebelmann, François Nataf, Dominique Joly
BACKGROUND: Despite a high prevalence of intracranial aneurysm (ICA) in autosomal dominant polycystic kidney disease (ADPKD), rupture events are rare. The current recommendations for ICA screening are based on expert opinions and studies with low levels of evidence. OBJECTIVES: The aim of our study was to describe the attitudes of practicing nephrologists in Europe towards screening for ICA using magnetic resonance angiography (MRA). METHODS: We conducted a web-based survey among 1315 European French-speaking nephrologists and nephrology residents...
2016: PloS One
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