keyword
MENU ▼
Read by QxMD icon Read
search

Temporal arteriitis

keyword
https://www.readbyqxmd.com/read/28339483/temporal-evolution-of-vasospasm-and-clinical-outcome-after-intra-arterial-vasodilator-therapy-in-patients-with-aneurysmal-subarachnoid-hemorrhage
#1
Laleh Daftari Besheli, Can Ozan Tan, Donnie L Bell, Joshua A Hirsch, Rajiv Gupta
Intra-arterial (IA) vasodilator therapy is one of the recommended treatments to minimize the impact of aneurysmal subarachnoid hemorrhage-induced cerebral vasospasm refractory to standard management. However, its usefulness and efficacy is not well established. We evaluated the effect IA vasodilator therapy on middle cerebral artery blood flow and on discharge outcome. We reviewed records for 115 adults admitted to Neurointensive Care Unit to test whether there was a difference in clinical outcome (discharge mRS) in those who received IA infusions...
2017: PloS One
https://www.readbyqxmd.com/read/28339362/diagnostic-performance-of-color-duplex-ultrasonography-along-with-temporal-artery-biopsy-in-suspicion-of-giant-cell-arteritis
#2
Christophe Roncato, Caroline Allix-Béguec, Elisabeth Brottier-Mancini, Bruno Gombert, Guillaume Denis
OBJECTIVES: Giant cell arteritis (GCA) is a vasculitis that occurs in older adults, affecting vessels of medium and large caliber. GCA diagnosis is a challenge for general practitioners and specialists. The aim of this study was to retrospectively analyse performances of temporal artery biopsy (TAB) and color duplex ultrasonography (CDU) for GCA diagnosis. METHODS: All patients with suspicion of GCA and who underwent both TAB and CDU between April 2009 and March 2014 were included in the study...
March 20, 2017: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/28332442/ultrasound-imaging-in-the-diagnosis-of-large-vessel-vasculitis
#3
Michael Czihal, Christian Lottspeich, Ulrich Hoffmann
Nowadays noninvasive vascular imaging has an important role in the diagnostic work-up of the large vessel vasculitides (LVV), most importantly giant cell arteritis (GCA) and Takayasu arteritis. Among the imaging modalities available, ultrasound (US) has several important advantages, including low costs, rapid and repetitive availability without exposure to radiation, and high spatial resolution for assessment of large and medium-sized arteries. Therefore, US can be regarded the first line imaging method in suspected LVV...
March 23, 2017: VASA. Zeitschrift Für Gefässkrankheiten
https://www.readbyqxmd.com/read/28328739/effects-of-a-brief-cognitive-behavioural-therapy-group-intervention-on-baseline-brain-perfusion-in-adolescents-with-major-depressive-disorder
#4
Zrinka Sosic-Vasic, Birgit Abler, Georg Grön, Paul Plener, Joana Straub
A number of neuroimaging studies have identified altered regional cerebral blood flow (rCBF) related to major depressive disorder (MDD) in adult samples, particularly in the lateral prefrontal, cingular and temporal regions. In contrast, neuroimaging investigations in adolescents with MDD are rare, although investigating young patients during a significant period of brain maturation might offer valuable insights into the neural mechanisms of MDD. We acquired perfusion images obtained with continuous arterial spin labelling in 21 medication-naive adolescents with MDD before and after a five-session cognitive behavioural group therapy (group CBT)...
March 21, 2017: Neuroreport
https://www.readbyqxmd.com/read/28326557/analysis-of-blood-flow-characteristics-in-a-model-of-a-mature-side-to-side-arteriovenous-fistula
#5
Ashkan Javadzadegan, Nay Myo Lwin, Muhammad Asyraf, Anne Simmons, Tracie Barber
The creation of an arteriovenous fistula (AVF) is a common surgical procedure in hemodialysis patients suffering from end-stage renal disease (ESRD). However, several complications may occur after surgery, including thrombosis, stenosis, and aneurysm. These complications are attributed to hemodynamics perturbations including pathophysiological wall shear stress (WSS) and flow recirculation zones. In this study, we present a computational hemodynamic analysis in a model of a mature side-to-side AVF, which is then validated by experimental measurements...
March 21, 2017: Artificial Organs
https://www.readbyqxmd.com/read/28324943/overcoming-spatio-temporal-limitations-using-dynamically-scaled-in-vitro-pc-mri-a-flow-field-comparison-to-true-scale-computer-simulations-of-idealized-stented-and-patient-specific-left-main-bifurcations
#6
Susann Beier, John Ormiston, Mark Webster, John Cater, Stuart Norris, Pau Medrano-Gracia, Alistair Young, Kathleen Gilbert, Brett Cowan
The majority of patients with angina or heart failure have coronary artery disease. Left main bifurcations are particularly susceptible to pathological narrowing. Flow is a major factor of atheroma development, but limitations in imaging technology such as spatio-temporal resolution, signal-to-noise ratio (SNRv), and imaging artefacts prevent in vivo investigations. Computational fluid dynamics (CFD) modelling is a common numerical approach to study flow, but it requires a cautious and rigorous application for meaningful results...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28324193/hemodynamic-characterization-of-peripheral-arterio-venous-malformations
#7
Sabrina Frey, A Haine, R Kammer, H von Tengg-Kobligk, D Obrist, I Baumgartner
Peripheral arterio-venous malformations (pAVMs) are congenital vascular anomalies that require treatment, due to their severe clinical consequences. The complexity of lesions often leads to misdiagnosis and ill-planned treatments. To improve disease management, we developed a computational model to quantify the hemodynamic effects of key angioarchitectural features of pAVMs. Hemodynamic results were used to predict the transport of contrast agent (CA), which allowed us to compare our findings to digital subtraction angiography (DSA) recordings of patients...
March 21, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28322426/diagnostic-value-of-contrast-enhanced-magnetic-resonance-angiography-in-large-vessel-vasculitis
#8
Sabine Adler, Marco Sprecher, Felix Wermelinger, Thorsten Klink, Harald Bonel, Peter M Villiger
OBJECTIVE: To evaluate contrast-enhanced magnetic resonance angiography (MRA) in diagnosis of inflammatory aortic involvement in patients with clinical suspicion of large-vessel vasculitis. PATIENTS AND METHODS: Seventy-five patients, mean age 62 years (range 16-82 years), 44 female and 31 male, underwent gadolinium-enhanced MRA and were evaluated retrospectively. Thoracic MRA was performed in 32 patients, abdominal MRA in 7 patients and both thoracic and abdominal MRA in 36 patients...
March 21, 2017: Swiss Medical Weekly
https://www.readbyqxmd.com/read/28321915/acceleration-of-asl-based-time-resolved-mr-angiography-by-acquisition-of-control-and-labeled-images-in-the-same-shot-actress
#9
Yuriko Suzuki, Noriyuki Fujima, Tetsuo Ogino, James Alastair Meakin, Akira Suwa, Hiroyuki Sugimori, Marc Van Cauteren, Matthias J P van Osch
PURPOSE: Noncontrast 4D-MR-angiography (MRA) using arterial spin labeling (ASL) is beneficial because high spatial and temporal resolution can be achieved. However, ASL requires acquisition of labeled and control images for each phase. The purpose of this study is to present a new accelerated 4D-MRA approach that requires only a single control acquisition, achieving similar image quality in approximately half the scan time. METHODS: In a multi-phase Look-Locker sequence, the first phase was used as the control image and the labeling pulse was applied before the second phase...
March 20, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28319203/relationship-between-low-tube-voltage-70-kv-and-the-iodine-delivery-rate-idr-in-ct-angiography-an-experimental-in-vivo-study
#10
Michael M Lell, Ulrike Fleischmann, Hubertus Pietsch, Johannes G Korporaal, Ulrike Haberland, Andreas H Mahnken, Thomas G Flohr, Michael Uder, Gregor Jost
OBJECTIVE: Very short acquisition times and the use of low-kV protocols in CTA demand modifications in the contrast media (CM) injection regimen. The aim of this study was to optimize the use of CM delivery parameters in thoraco-abdominal CTA in a porcine model. MATERIALS AND METHODS: Six pigs (55-68 kg) were examined with a dynamic CTA protocol (454 mm scan length, 2.5 s temporal resolution, 70 s total acquisition time). Four CM injection protocols were applied in a randomized order...
2017: PloS One
https://www.readbyqxmd.com/read/28315516/metaplastic-ossification-of-the-temporal-artery-with-osteoclast-like-giant-cells-a-mimicker-of-giant-cell-temporal-arteritis
#11
Miroslav Sekulic, Alexander M Truskinovsky
PURPOSE: To describe a patient presenting with suspected giant cell (temporal) arteritis (GCA) in whom subsequent temporal artery biopsy showed luminal narrowing by medial calcification, metaplastic ossification, and fibrointimal proliferation, consistent with calciphylaxis. METHODS: A 55-year-old man with end-stage renal disease presented with unilateral loss of vision and elevated erythrocyte sedimentation rate and was initially treated as though he had GCA; however, a subsequent temporal artery biopsy showed marked luminal narrowing by medial calcification, metaplastic ossification, and fibrointimal proliferation, consistent with calciphylaxis...
February 28, 2017: European Journal of Ophthalmology
https://www.readbyqxmd.com/read/28314594/brain-ischemia-suppresses-immunity-in-the-periphery-and-brain-via-different-neurogenic-innervations
#12
Qiang Liu, Wei-Na Jin, Yaou Liu, Kaibin Shi, Haoran Sun, Fang Zhang, Chao Zhang, Rayna J Gonzales, Kevin N Sheth, Antonio La Cava, Fu-Dong Shi
Brain ischemia inhibits immune function systemically, with resulting infectious complications. Whether in stroke different immune alterations occur in brain and periphery and whether analogous mechanisms operate in these compartments remains unclear. Here we show that in patients with ischemic stroke and in mice subjected to middle cerebral artery occlusion, natural killer (NK) cells display remarkably distinct temporal and transcriptome profiles in the brain as compared to the periphery. The activation of catecholaminergic and hypothalamic-pituitary-adrenal axis leads to splenic atrophy and contraction of NK cell numbers in the periphery through a modulated expression of SOCS3, whereas cholinergic innervation-mediated suppression of NK cell responses in the brain involves RUNX3...
March 21, 2017: Immunity
https://www.readbyqxmd.com/read/28301310/glass-fiber-based-mr-safe-guidewire-for-mr-imaging-guided-endovascular-interventions-in-vitro-and-preclinical-in-vivo-feasibility-study
#13
Alexander Massmann, Arno Buecker, Guenther K Schneider
Purpose To evaluate glass-fiber-based guidewires that are safe for magnetic resonance (MR) imaging-guided endovascular interventions by using a phantom and an in vivo swine model. Materials and Methods MR imaging-safe guidewires were made from micropultruded glass and/or aramid fibers and epoxy resin with diameters of 0.89 mm (0.035 inch) for standard and stiff guidewires and 0.36 mm (0.014 inch) for micro guidewires. MR imaging visibility and mechanical properties were assessed in a pulsatile flow model. After approval was obtained from the institutional animal care and use committee, MR imaging guidewires were evaluated for standard endovascular procedures in nine pigs...
March 14, 2017: Radiology
https://www.readbyqxmd.com/read/28298371/temporal-trends-in-treatment-and-outcomes-of-acute-myocardial-infarction-in-patients-with-chronic-obstructive-pulmonary-disease-a-nationwide-population-based-observational-study
#14
Tse-Hsuan Su, Shang-Hung Chang, Pei-Chun Chen, Yi-Ling Chan
BACKGROUND: Acute myocardial infarction is a major cause of hospitalization and death in patients with chronic obstructive pulmonary disease (COPD); however, temporal trends in the management and clinical outcomes of these patients remain unclear. METHODS AND RESULTS: We conducted an observational study by using a representative sample of 1 million beneficiaries from the Taiwan National Health Insurance Research Database. Comorbidities, in-hospital treatment, and outcomes were compared for patients with acute myocardial infarction with and without COPD between 2004 and 2013...
March 15, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28294539/angiographically-detectable-thebesian-veins-are-a-dynamic-and-reversible-finding-in-the-setting-of-congenital-heart-disease
#15
Paul Tannous, Sunil J Ghelani, Audrey C Marshall, Diego Porras
OBJECTIVE: Angiographically detectable Thebesian veins (ThVs) are a rare finding sometimes associated with coronary steal and myocardial ischemia in adults, but there are limited data regarding prominent ThVs in the setting of complex congenital heart disease (CHD). This study represents the largest series to date describing the presence and temporal changes of angiographically detectable ThVs in children with CHD. METHODS: This is a single center case series describing the clinical characteristics and coronary anatomy in children with CHD and angiographicall detectable ThVs...
March 10, 2017: Congenital Heart Disease
https://www.readbyqxmd.com/read/28294455/integration-of-arterial-spin-labeling-into-stereotactic-radiosurgery-planning-of-cerebral-arteriovenous-malformations
#16
Onur Ozyurt, Alp Dincer, Mehmet Erdem Yildiz, Selcuk Peker, Meltem Yilmaz, Meric Sengoz, Cengizhan Ozturk
PURPOSE: To test whether the combined use of 4D arterial spin labeling angiography (4D ASL) and contrast-enhanced magnetic resonance angiography (4D CE-MRA) can work as a prospective alternative to digital subtraction angiography (DSA) for the delineation of the arteriovenous malformation (AVM) nidus in stereotactic radiosurgery (SRS) planning. MATERIALS AND METHODS: A custom 4D ASL sequence and a proof-of-concept software tool to integrate 4D ASL data to SRS planning were implemented...
March 10, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28290071/structural-connectivity-in-spatial-attention-network-reconstruction-from-left-hemispatial-neglect
#17
Takaaki Hattori, Kenji Ito, Chika Nakazawa, Yoshiyuki Numasawa, Mayumi Watanabe, Shigeki Aoki, Hidehiro Mizusawa, Sumio Ishiai, Takanori Yokota
Left hemispatial neglect (neglect) is an impaired state of spatial attention. We aimed to reconstruct structural connectivity in the spatial attention network and to identify disconnection patterns underlying neglect. We enrolled 59 right-handed patients who had their first-ever infarction in the right hemisphere and classified them into neglect group (34 patients with neglect) and control group (25 patients without neglect). The neglect group was further subcategorized into 6 subgroups based on infarcted vascular territories...
March 13, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/28285476/resuscitative-endovascular-balloon-occlusion-of-the-aorta-pushing-care-forward
#18
William Teeter, Anna Romagnoli, Jacob Glaser, Andrew D Fisher, Jason Pasley, Brian Scheele, Melanie Hoehn, Megan Brenner
BACKGROUND: Resuscitative endovascular balloon occlusion of the aorta (REBOA), used to temporize noncompressible and junctional hemorrhage, may be deployable to the forward environment. Our hypothesis was that nonsurgeon physicians and high-level military medical technicians would be able to learn the theory and insertion of REBOA. METHODS: US Army Special Operations Command medical personnel without prior endovascular experience were included. All participants received didactic instruction of the Basic Endovascular Skills for Trauma Course™ together, with individual evaluation of technical skills...
2017: Journal of Special Operations Medicine: a Peer Reviewed Journal for SOF Medical Professionals
https://www.readbyqxmd.com/read/28281146/influence-of-the-cardiac-cycle-on-pcasl-cardiac-triggering-of-the-end-of-labeling
#19
Jasper Verbree, Matthias J P van Osch
OBJECTIVE: In arterial spin labeling (ASL), the cardiac cycle might adversely influence signal-stability by varying the amount of label created, labeling efficiency and/or transport times. Due to the long labeling duration in pseudo-Continuous ASL (pCASL), the blood labeled last contributes most to the ASLsignal. The present study investigated, using numerical simulations and in vivo experiments, the effect of the cardiac cycle on pCASL, thereby focusing on the end-of-labeling. MATERIALS AND METHODS: In the in vivo experiments the end-of-labeling was timed to a specific cardiac phase while a long labeling duration of >7 s was used to isolate the influence of the lastly labeled spins on ASL-signal stability...
March 9, 2017: Magma
https://www.readbyqxmd.com/read/28281006/signal-reduction-of-donor-artery-on-mri-after-superficial-temporal-artery-to-middle-cerebral-artery-anastomosis-a-retrospective-analysis
#20
Satoshi Koizumi, Toshikazu Kimura, Tomohiro Inoue
OBJECT: Microsurgical anastomosis from the superficial temporal artery (STA) to the middle cerebral artery (MCA) is a treatment option for appropriately selected patients with cranial atherosclerotic steno-occlusive disease (CASD). However, the long-term efficacy and patency of the donor artery remain unclear. We reviewed the signal intensity of the donor artery on magnetic resonance angiography (MRA) after STA-MCA anastomosis in patients with CASD and clarified the incidence of and risk factors for reduction in postoperative signal of STA...
March 9, 2017: Acta Neurochirurgica
keyword
keyword
94286
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"