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https://www.readbyqxmd.com/read/29667759/incidence-predictors-and-clinical-management-of-hyperkalaemia-in-new-users-of-mineralocorticoid-receptor-antagonists
#1
Marco Trevisan, Pietro de Deco, Hairong Xu, Marie Evans, Bengt Lindholm, Rino Bellocco, Peter Barany, Tomas Jernberg, Lars H Lund, Juan J Carrero
BACKGROUND: Concerns for hyperkalaemia limit the use of mineralocorticoid receptor antagonists (MRAs). The frequency of MRA-associated hyperkalaemia in real-world settings and the extent of subsequent MRA discontinuation are poorly quantified. METHODS AND RESULTS: Observational study including all Stockholm citizens initiating MRA therapy during 2007-2010. Hyperkalaemias were identified from all potassium (K+ ) measurements in healthcare. MRA treatment lengths and dosages were obtained from complete collection of pharmacy dispensations...
April 18, 2018: European Journal of Heart Failure
https://www.readbyqxmd.com/read/29666993/non-contrast-enhanced-magnetic-resonance-angiography-a-reliable-clinical-tool-for-evaluating-transplant-renal-artery-stenosis
#2
Long Jiang Zhang, Jin Peng, Jiqiu Wen, U Joseph Schoepf, Akos Varga-Szemes, L Parkwood Griffith, Yuan Meng Yu, Shu Min Tao, Yan Jun Li, Xue Feng Ni, Jian Xu, Dong Hong Shi, Guang Ming Lu
PURPOSE: To evaluate image quality of non-contrast-enhanced magnetic resonance angiography (MRA) and compare transplant renal artery stenosis (TRAS) seen by non-contrast-enhanced MRA with digital subtraction angiography (DSA) as the gold standard. MATERIALS AND METHODS: 330 patients receiving 369 non-contrast-enhanced MRA examinations from July 2014 to June 2017 were included. Thirty patients received at least two MRA examinations. Image quality was independently assessed by two radiologists...
April 17, 2018: European Radiology
https://www.readbyqxmd.com/read/29666047/comparison-of-magnetic-resonance-angiography-and-18-f-fluorodeoxyglucose-positron-emission-tomography-in-large-vessel-vasculitis
#3
Kaitlin A Quinn, Mark A Ahlman, Ashkan A Malayeri, Jamie Marko, Ali Cahid Civelek, Joel S Rosenblum, Armin A Bagheri, Peter A Merkel, Elaine Novakovich, Peter C Grayson
OBJECTIVES: To assess agreement between interpretation of magnetic resonance angiography (MRA) and 18 F-fluorodeoxyglucose positron emission tomography (PET) for disease extent and disease activity in large-vessel vasculitis (LVV) and determine associations between imaging and clinical assessments. METHODS: Patients with giant cell arteritis (GCA), Takayasu's arteritis (TAK) and comparators were recruited into a prospective, observational cohort. Imaging and clinical assessments were performed concurrently, blinded to each other...
April 17, 2018: Annals of the Rheumatic Diseases
https://www.readbyqxmd.com/read/29663178/validation-of-contrast-enhanced-time-resolved-magnetic-resonance-angiography-in-pre-ablation-planning-in-patients-with-atrial-fibrillation-comparison-with-traditional-technique
#4
Tarek Zghaib, Adeel Shahid, Chiara Pozzessere, Kristin K Porter, Linda C Chu, John Eng, Hugh Calkins, Ihab R Kamel, Saman Nazarian, Stefan L Zimmerman
Bolus timing is critical to optimal magnetic resonance angiography (MRA) acquisitions but can be challenging in some patients. Our purpose was to evaluate whether contrast-enhanced time-resolved magnetic resonance angiography (TR-MRA), a dynamic multiphase sequence that does not rely on bolus timing, is a viable alternative method to conventional 3D fast-long angle shot contrast-enhanced magnetic resonance angiography (CE-MRA). Coronal subtracted conventional CE-MRA images in 50 consecutive patients presenting for pre-atrial fibrillation ablation pulmonary venous (PV) mapping were compared with 50 TR-MRA images performed in 50 subsequent patients...
April 16, 2018: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/29658769/multimodality-imaging-assessment-of-endoleaks-post-endovascular-aortic-repair
#5
Sasan Partovi, Thomas Trischman, Vasileios Rafailidis, Suvranu Ganguli, Fabian Rengier, Harold Goerne, Prabhakar Rajiah, Daniel Staub, Indravadan J Patel, George Oliveira, Brian Ghoshhajra
Endoleaks are a common complication of endovascular aortic repair (EVAR). As a result, patients require lifelong imaging surveillance following EVAR. In current clinical practice evaluation for endoleaks is predominantly performed with computed tomography angiography (CTA). Due to the significant cumulative radiation burden associated with repetitive CTA imaging, as well as the repeated administration of nephrotoxic contrast agent, contrast-enhanced ultrasound (CEUS) and magnetic resonance angiography (MRA) have evolved as potential modalities for lifelong surveillance post-EVAR...
April 16, 2018: British Journal of Radiology
https://www.readbyqxmd.com/read/29627025/cerebrovascular-imaging-of-cerebral-ischemia-in-acute-type-a-aortic-dissection
#6
Soichiro Matsubara, Masatoshi Koga, Tomoyuki Ohara, Yasuyuki Iguchi, Kenji Minatoya, Yoshio Tahara, Tetsuya Fukuda, Yuichi Miyazaki, Katsufumi Kajimoto, Yuki Sakamoto, Naoki Makita, Naoki Tokuda, Kazuyuki Nagatsuka, Yukio Ando, Kazunori Toyoda
BACKGROUND AND PURPOSE: Stanford type A aortic dissection (AAD) sometimes causes acute ischemic stroke (AIS) or transient ischemic attack (TIA). There is little understanding of cerebrovascular imaging of AIS or TIA in patients with AAD. METHODS: Consecutive AIS/TIA patients with AAD who were admitted within 4.5 h of onset were reviewed. We compared findings of MRI/MRA between these and consecutive AIS/TIA patients without AAD within 4.5 h of onset. RESULTS: Seventeen AAD and 249 non-AAD patients were identified...
May 15, 2018: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/29624149/detection-rates-and-sites-of-unruptured-intracranial-aneurysms-according-to-sex-and-age-an-analysis-of-mr-angiography-based-brain-examinations-of-4070-healthy-japanese-adults
#7
Yohichi Imaizumi, Tohru Mizutani, Katsuyoshi Shimizu, Yosuke Sato, Junichi Taguchi
OBJECTIVE The purpose of this study was to evaluate the detection rate and occurrence site according to patient sex and age of unruptured intracranial aneurysms detected through MRI and MR angiography (MRA). METHODS A total of 4070 healthy adults 22 years or older (mean age [± SD] 50.6 ± 11.0 years; 41.9% women) who underwent a brain examination known as "Brain Dock" in the central Tokyo area between April 2014 and March 2015 were checked for unruptured saccular aneurysm using 3-T MRI/MRA. The following types of cases were excluded: 1) protrusions with a maximum diameter < 2 mm at locations other than arterial bifurcations, 2) conical protrusions at arterial bifurcations with a diameter < 3 mm, and 3) cases of suspected aneurysms with unclear imaging of the involved artery...
April 6, 2018: Journal of Neurosurgery
https://www.readbyqxmd.com/read/29620649/primary-medullary-hemorrhage-in-a-patient-with-coagulopathy-due-to-alcoholic-cirrhosis-a-case-report
#8
Guangxun Shen, Yu Gao, Kwee-Yum Lee, Guangxian Nan
RATIONALE: Mild-to-moderate alcoholic cirrhosis of the liver is related to spontaneous intracerebral hemorrhage (ICH). In terms of spontaneous brainstem hemorrhage, pontine is considered as the most common site in contrast to medulla oblongata where the hemorrhage is rarely seen. This rare primary medullary hemorrhage has been attributed so far to vascular malformation (VM), anticoagulants, hypertension, hemorrhagic transformation, and other undetermined factors. PATIENT CONCERNS: Herein, we describe a 53-year-old patient with 35-year history of alcohol abuse was admitted for acute-onset isolated hemianesthesia on the right side...
April 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29620535/vsion-as-high-field-mri-t1-contrast-agent-evidence-of-their-potential-as-positive-contrast-agent-for-magnetic-resonance-angiography
#9
Thomas Vangijzegem, Dimitri Stanicki, Sébastien Boutry, Quentin Paternoster, Luce Vander Elst, Robert Nathan Muller, Sophie Laurent
Because of their outstanding magnetic properties, iron oxide nanoparticles have already been &#13; the subject of numerous studies in the biomedical field, in particular as negative contrast agent &#13; for T2-weighted nuclear magnetic resonance imaging, or as therapeutic agents for hyperthermia &#13; experiments. Recent studies have shown that below a given size (i.e. 5 nm), iron oxide may be &#13; used to exhibit a significant positive (brightening) effect on T1-weighted MRI. When focusing &#13; on such application, not only the size of the crystal, but also the control of the coating process &#13; is essential to ensure optimal properties, especially at very high field (&gt; 3T)...
April 5, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29617449/assessment-of-veins-in-t2-weighted-mr-angiography-predicts-infarct-growth-in-hyperacute-ischemic-stroke
#10
Susumu Yamaguchi, Nobutaka Horie, Minoru Morikawa, Yohei Tateishi, Takeshi Hiu, Yoichi Morofuji, Tsuyoshi Izumo, Kentaro Hayashi, Takayuki Matsuo
BACKGROUND AND PURPOSE: T2*-weighted magnetic resonance angiography (SWAN) detects hemodynamic insufficiency as hypointense areas in medullary or cortical veins. We therefore investigated whether SWAN can help predict ischemic penumbra-like lesions in patients with acute ischemic stroke (AIS). MATERIALS AND METHODS: Magnetic resonance imaging (MRI) records-including SWAN, diffusion-weighted imaging (DWI), and magnetic resonance angiography (MRA)-of consecutive patients with major vessel occlusion within 6 h from AIS onset were analyzed...
2018: PloS One
https://www.readbyqxmd.com/read/29613964/mr-imaging-of-thoracic-aortic-disease
#11
John P Lichtenberger, Derek F Franco, Jason S Kim, Brett W Carter
A number of congenital defects and acquired disease processes affect the thoracic aorta, and traditionally, computed tomography (CT) has been the mainstay of imaging, especially in evaluation of the acute aorta. However, recent advances in magnetic resonance (MR) imaging such as electrocardiographically (ECG) triggered breath-hold sequences and ultrafast 3-dimensional MR angiography (MRA) are bringing MR imaging to the forefront of imaging of the thoracic aorta. By providing high-resolution morphological imaging and sophisticated vascular flow analysis for functional data, this modality can provide a comprehensive, reproducible evaluation of the thoracic aorta...
April 2018: Topics in Magnetic Resonance Imaging: TMRI
https://www.readbyqxmd.com/read/29607919/-rapidly-deteriorated-lobar-intracerebral-hemorrhages-possible-association-of-varicella-zoster-virus-vasculopathy
#12
Jun Takeshita, Eiichi Nomura, Makoto Takemaru, Takahiro Himeno, Yutaka Shimoe, Masaru Kuriyama
A 75-year-old man having dementia and lifestyle related diseases developed a lobar intracerebral hemorrhage (LICH) in the left parietal and a small cerebellar infarction in the left occipital lobe. Many micro bleeds (MB) due to cerebral amyloid angiopathy (CAA) in the subcortical areas and multiple vascular stenosis were also found by MRI and MRA. He developed herpes zoster in his buttocks on day 6 of hospitalization and complicated with varicella zoster virus (VZV) meningitis with positive for VZV-DNA in the cerebrospinal fluid...
March 31, 2018: Rinshō Shinkeigaku, Clinical Neurology
https://www.readbyqxmd.com/read/29605121/an-audit-of-clinical-practice-referral-patterns-and-appropriateness-of-clinical-indications-for-brain-mri-examinations-a-single-centre-study-in-ghana
#13
A D Piersson, G Nunoo, P N Gorleku
INTRODUCTION: The aim of this study was to investigate current brain MRI practice, pattern of brain MRI requests, and their appropriateness using the American College of Radiology (ACR) Appropriateness Criteria. MATERIAL AND METHODS: We used direct observation and questionnaires to obtain data concerning routine brain MRI practice. We then retrospectively analyzed (i) demographic characteristics, (ii) clinical history, and (iii) appropriateness of brain MRI requests against published criteria...
May 2018: Radiography
https://www.readbyqxmd.com/read/29582321/diagnostic-performance-of-shoulder-magnetic-resonance-arthrography-for-labral-tears-having-surgery-as-reference-comparison-of-high-resolution-isotropic-3d-sequence-thrive-with-standard-protocol
#14
Sun Hwa Lee, Seong Jong Yun, Youngno Yoon
PURPOSE: To compare the diagnostic performance of T1 high-resolution isotropic volume excitation (THRIVE) sequence with that of a standard protocol for direct shoulder magnetic resonance arthrography (MRA) for the diagnosis of superior labral anterior-to-posterior (SLAP) and Bankart lesions, using arthroscopy findings as a reference standard. MATERIALS AND METHODS: We retrospectively studied 84 patients who underwent direct shoulder 3T MRA using THRIVE and two-dimensional three-plane proton-density fat-suppressed (2D-PD-FS) sequences...
March 26, 2018: La Radiologia Medica
https://www.readbyqxmd.com/read/29582141/diagnosis-of-glenoid-labral-tears-using-3-tesla-mri-vs-3-tesla-mra-a-systematic-review-and-meta-analysis
#15
Adil Ajuied, Ciaran P McGarvey, Ziad Harb, Christian C Smith, Russell P Houghton, Steven A Corbett
BACKGROUND: Various protocols exist for magnetic resonance arthrogram (MRA) of the shoulder, including 3D isotropic scanning and positioning in neutral (2D neutral MRA), or abduction-external-rotation (ABER). HYPOTHESIS: MRA does not improve diagnostic accuracy for labral tears when compared to magnetic resonance imaging (MRI) performed using 3-Tesla (3T) magnets. METHOD: Systematic review of the Cochrane, MEDLINE, and PubMed databases according to PRISMA guidelines...
March 26, 2018: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/29580568/giant-intradural-cervical-spine-arteriovenous-malformations-a-case-and-review-of-literature
#16
Seidu A Richard, Lu Ma, Hao Li, Jin Li, Chao You
INTRODUCTION: Spinal arteriovenous malformations (SAVMs) are very rare and can be very challenging to treat since none of the therapeutic options does provide a definitive cure to these lesions. We believe that incorporation of intraoperative angiography during surgery in a hybrid theatre can help achieve a better cure. CASE PRESENTATION: We present a 45 years old woman with three (3) years history of weakness and ten (10) days' history of acute pain in right upper extremity...
March 9, 2018: Neurologia i Neurochirurgia Polska
https://www.readbyqxmd.com/read/29579908/quantitative-microbiological-risk-assessment-in-food-industry-theory-and-practical-application
#17
Jeanne-Marie Membré, Géraldine Boué
The objective of this article is to bring scientific background as well as practical hints and tips to guide risk assessors and modelers who want to develop a quantitative Microbiological Risk Assessment (MRA) in an industrial context. MRA aims at determining the public health risk associated with biological hazards in a food. Its implementation in industry enables to compare the efficiency of different risk reduction measures, and more precisely different operational settings, by predicting their effect on the final model output...
April 2018: Food Research International
https://www.readbyqxmd.com/read/29578280/factors-associated-with-underuse-of-mineralocorticoid-receptor-antagonists-in-heart-failure-with-reduced-ejection-fraction-an-analysis-of-11-215-patients-from-the-swedish-heart-failure-registry
#18
Gianluigi Savarese, Juan-Jesus Carrero, Bertram Pitt, Stefan D Anker, Giuseppe M C Rosano, Ulf Dahlström, Lars H Lund
AIM: Mineralocorticoid receptor antagonists (MRAs) improve outcomes in heart failure with reduced ejection fraction (HFrEF), but are underutilized. Hyperkalaemia may be one reason, but the underlying reasons for underuse are unknown. The aim of this study was to investigate the independent predictors of MRA underuse in a large and unselected HFrEF cohort. METHODS AND RESULTS: We included patients with HFrEF (ejection fraction <40%), New York Heart Association (NYHA) class II-IV and heart failure (HF) duration ≥6 months from the Swedish HF Registry...
March 26, 2018: European Journal of Heart Failure
https://www.readbyqxmd.com/read/29575995/large-vessel-arteriopathy-after-cranial-radiation-therapy-in-pediatric-brain-tumor-survivors
#19
Matthew Nordstrom, Erin Felton, Katherine Sear, Benita Tamrazi, Joseph Torkildson, Karen Gauvain, Daphne A Haas-Kogan, Josephine Chen, Benedict Del Buono, Anuradha Banerjee, David Samuel, David Saloner, Bing Tian, Erika Roddy, Christopher Hess, Heather Fullerton, Sabine Mueller
Among childhood cancer survivors, increased stroke risk after cranial radiation therapy may be caused by radiation-induced arteriopathy, but limited data exist to support this hypothesis. Herein, we assess the timing and presence of cerebral arteriopathy identified by magnetic resonance angiography (MRA) after cranial radiation therapy in childhood brain tumor survivors. In a cohort of 115 pediatric brain tumor survivors, we performed chart abstraction and prospective annual follow-up to assess the presence of large vessel cerebral arteriopathy by MRA...
April 2018: Journal of Child Neurology
https://www.readbyqxmd.com/read/29575745/evaluation-of-two-dimensional-bruch-s-membrane-opening-minimum-rim-area-for-glaucoma-diagnostics-in-a-large-patient-cohort
#20
Philip Enders, Werner Adler, David Kiessling, Vincent Weber, Friederike Schaub, Manuel M Hermann, Thomas Dietlein, Claus Cursiefen, Ludwig M Heindl
PURPOSE: To characterize the two-dimensional parameter Bruch's membrane opening minimum rim area (BMO-MRA) in spectral domain optical coherence tomography (SD-OCT) of the optic nerve head (ONH) compared to minimum rim width (BMO-MRW) and retinal nerve fibre layer (RNFL) thickness in a large patient cohort. METHODS: Case-control, cross-sectional study of 705 eyes of 445 participants. A total of 449 eyes with glaucoma, 67 eyes with ocular hypertension and 189 healthy controls, underwent SD-OCT and confocal laser scanning tomography (CSLT), visual field testing and clinical examination...
March 24, 2018: Acta Ophthalmologica
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