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https://www.readbyqxmd.com/read/28228836/one-sided-headache-is-a-symptom-suggesting-aneurysmal-lesion-in-patients-with-isolated-abducens-nerve-palsy
#1
Hidehiro Oku, Shigeru Miyachi, Tsunehiko Ikeda
An isolated unilateral abducens nerve palsy or headache alone usually yields negative findings on neuroimages. The authors report an individual with right abducens nerve palsy who developed a sudden, persistent headache on the right side. Magnetic resonance imaging (MRI) and magnetic resonance angiography (MRA) revealed a giant aneurysm of the cavernous carotid artery that was located along the course of the right abducens nerve. The findings in this case of isolated abducens nerve palsy suggest that headaches should be considered as important signs for intracranial aneurysmal lesions...
February 2017: Neuro-ophthalmology
https://www.readbyqxmd.com/read/28228620/a-case-of-intracranial-arterial-dolichoectasia-with-4-repeated-cerebral-infarctions-in-6-months-and-enlargement-of-basilar-artery
#2
Hideyuki Moriyoshi, Soma Furukawa, Mai Iwata, Junichiro Suzuki, Noriyoshi Nakai, Suguru Nishida, Yasuhiro Ito
A 78-year-old man was admitted to our hospital because of sudden right hemiparesis and dysarthria. His cranial MRI showed an area of hyperintensity in left pons on DWI and MRA revealed dilated, elongated and tortuous intracranial artery. We diagnosed as acute phase ischemic stroke and intracranial arterial dolichoectasia (IADE). Intravenous infusion of rt-PA was performed 157 minutes after the onset of symptoms, and his hemiparesis improved. However, he subsequently suffered from cerebral infarction 4 times in 6 months, and we treated him twice with thrombolytic therapy...
February 22, 2017: Rinshō Shinkeigaku, Clinical Neurology
https://www.readbyqxmd.com/read/28228434/sagittal-sinus-thrombosis-in-jak2-v617f-mutation-without-overt-myeloproliferative-disorder
#3
Prashant Ramesh Bhand, Supriya Ramesh Karde, Nagabathula Ramesh
We describe a case of a man aged 41 years who presented with a history of generalised headaches for 1 week and an acute episode of tonic-clonic seizures. He had no history of medical illness, was non-smoker, with an extensive family history of haematological disorders. Initial CT brain with contrast did not show any abnormalities in brain parenchyma. X-ray and CT right shoulder showed shoulder dislocation secondary to trauma associated with seizure prior to hospital admission. Subsequently, MRA and MRV brain was arranged, which revealed extensive expansible occlusive filling defect dominating the middle of superior sagittal sinus with left frontal cortical and subcortical acute oedema...
February 22, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28216625/endothelial-overexpression-of-endothelin-1-modulates-aortic-carotid-iliac-and-renal-arterial-responses-in-obese-mice
#4
Oliver Baretella, Sookja K Chung, Aimin Xu, Paul M Vanhoutte
Endothelin-1 (ET-1) is essential for mammalian development and life, but it has also been implicated in increased cardiovascular risk under pathophysiological conditions. The aim of this study was to determine the impact of endothelial overexpression of the prepro-endothelin-1 gene on endothelium-dependent and endothelium-independent responses in the conduit and renal arteries of lean and obese mice. Obesity was induced by high-fat-diet (HFD) consumption in mice with Tie-1 promoter-driven, endothelium-specific overexpression of the prepro-endothelin-1 gene (TET(het)) and in wild-type (WT) littermates on a C57BL/6N background...
February 20, 2017: Acta Pharmacologica Sinica
https://www.readbyqxmd.com/read/28209305/initial-vasodilatation-in-a-child-with-reversible-cerebral-vasoconstriction-syndrome
#5
Yoshitsugu Oikawa, Yukimune Okubo, Yurika Numata-Uematsu, Yu Aihara, Taro Kitamura, Masaru Takayanagi, Yukitoshi Takahashi, Shigeo Kure, Mitsugu Uematsu
We describe the case of a 10-year-old boy who developed reversible cerebral vasoconstriction syndrome (RCVS) after cerebellitis. He received intravenous immunoglobulin and methylprednisolone to treat the cerebellitis. However, he then presented with a sudden severe headache, vomiting, and generalized tonic-clonic seizure. Brain magnetic resonance angiography (MRA) initially revealed diffuse cerebral vasodilatations, and diffuse multifocal segmental vasoconstrictions developed several days later. His clinical symptoms gradually resolved after several days, in the absence of any specific therapy...
February 10, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28207576/relationship-between-peripheral-and-psychophysical-measures-of-amplitude-modulation-detection-in-cochlear-implant-users
#6
Viral D Tejani, Paul J Abbas, Carolyn J Brown
OBJECTIVE: This study investigates the relationship between electrophysiological and psychophysical measures of amplitude modulation (AM) detection. Prior studies have reported both measures of AM detection recorded separately from cochlear implant (CI) users and acutely deafened animals, but no study has made both measures in the same CI users. Animal studies suggest a progressive loss of high-frequency encoding as one ascends the auditory pathway from the auditory nerve to the cortex...
February 15, 2017: Ear and Hearing
https://www.readbyqxmd.com/read/28197872/mr-arthrography-of-the-shoulder-evaluation-of-isotropic-3d-intermediate-weighted-fse-and-hybrid-gre-t1-weighted-sequences
#7
Giovanni Foti, Paolo Avanzi, William Mantovani, Flavia Dal Corso, Emanuele Demozzi, Claudio Zorzi, Giovanni Carbognin
PURPOSE: To compare the diagnostic accuracy of three-dimensional (3D) fast spin echo (FSE) intermediate-weighed (IW-3D) and 3D hybrid double-echo steady-state T1-weighted sequences (Hy-3D) and two-dimensional (FSE) images (2D) at shoulder MR arthrography (MRA). MATERIALS AND METHODS: Institutional review board approval was obtained and informed consent was waived for this retrospective study. From September 2011 to October 2014, 102 patients who had undergone 1...
February 15, 2017: La Radiologia Medica
https://www.readbyqxmd.com/read/28197712/outflow-angle-measurement-a-simple-approach-for-the-differential-diagnosis-of-intracranial-protrusion-with-a-branch-artery-arising-from-its-top
#8
Mo Chen, Hong-Mei Song, Ming-Hua Li, Wu Wang, Yong-Dong Li
PURPOSE: Magnetic resonance angiography (MRA) is an important diagnosis method for the detection of intracranial aneurysms (IAs), but it is not useful for differentiating between IA and infundibular dilatation (ID) in patients in whom imaging shows an intracranial protrusion with a branch artery at its top. The objective of this study was to introduce a new approach-measurement of the outflow angle (OA)-for differentiating between IA and ID in such cases. METHODS: The study included 7 patients with a total of 9 protrusions...
February 14, 2017: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/28197027/comparison-of-computed-tomographic-angiography-and-noncontrast-magnetic-resonance-angiography-in-preoperative-evaluation-of-living-renal-donors
#9
Abhijit Dnyandeo Patil, K Shailage, Jeyaseelan Nadarajah, P Harigovind, R Krishna Mohan
INTRODUCTION: The computed tomographic angiography (CTA) renal donor protocol is an established method of preoperative renal vascular pedicle evaluation in prospective renal donors. However, CTA is associated with significant radiation exposure and intravenous contrast administration. The newer noncontrast-enhanced magnetic resonance angiography (NCE-MRA) techniques, especially arterial spin labeling (ASL) with steady-state free precession (SSFP) hold promise as an effective alternative...
January 2017: Indian Journal of Urology: IJU: Journal of the Urological Society of India
https://www.readbyqxmd.com/read/28187865/a-new-threshold-of-apparent-diffusion-coefficient-values-in-white-matter-after-successful-tissue-plasminogen-activator-treatment-for-acute-brain-ischemia
#10
Atsushi Sato, Yusaku Shimizu, Junichi Koyama, Kazuhiro Hongo
BACKGROUND AND PURPOSE: Tissue plasminogen activator (tPA) is effective for the treatment of acute brain ischemia, but may trigger fatal brain edema or hemorrhage if the brain ischemia results in a large infarct. Herein, we attempted to predict the extent of infarcts by determining the optimal threshold of ADC values on DWI that predictively distinguishes between infarct and reversible areas, and by reconstructing color-coded images based on this threshold. MATERIALS AND METHODS: The study subjects consisted of 36 patients with acute brain ischemia in whom MRA had confirmed reopening of the occluded arteries in a short time (mean: 99min) after tPA treatment...
February 7, 2017: Journal of Neuroradiology. Journal de Neuroradiologie
https://www.readbyqxmd.com/read/28185125/ulnar-sided-wrist-pain-in-the-athlete-tfcc-druj-ecu
#11
REVIEW
Eric Quan Pang, Jeffrey Yao
PURPOSE OF REVIEW: The goal of this manuscript is to review key historic and recent literature regarding extensor carpi ulnaris (ECU), triangular fibrocartilage complex (TFCC) and distal radioulnar joint (DRUJ) injuries, particularly in athletes. RECENT FINDINGS: Many recent studies examining the ECU focus on clinical and radiographic diagnosis. Several physical exam findings are described in addition to the use of MRI and US. Imaging studies must be clinically correlated due to high incidence of findings in asymptomatic patients...
February 9, 2017: Current Reviews in Musculoskeletal Medicine
https://www.readbyqxmd.com/read/28183839/mr-imaging-of-individual-perfusion-reorganization-using-superselective-pseudocontinuous-arterial-spin-labeling-in-patients-with-complex-extracranial-steno-occlusive-disease
#12
V Richter, M Helle, M J P van Osch, T Lindner, A S Gersing, P Tsantilas, H-H Eckstein, C Preibisch, C Zimmer
BACKGROUND AND PURPOSE: Patients with multiple stenoses or occlusions of the extracranial arteries require an individualized diagnostic approach. We evaluated the feasibility and clinical utility of a novel MR imaging technique for regional perfusion imaging in this patient group. MATERIALS AND METHODS: Superselective pseudocontinuous arterial spin-labeling with a circular labeling spot enabling selective vessel labeling was added to routine imaging in a prospective pilot study in 50 patients (10 women, 70...
February 9, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28182715/mr-angiography-allows-defining-severity-grades-of-cerebral-vasospasm-in-an-experimental-double-blood-injection-subarachnoid-hemorrhage-model-in-rats
#13
Vesna Malinova, Marios N Psychogios, Ioannis Tsogkas, Birte Koennecke, Kim Bleuel, Bogdan Iliev, Veit Rohde, Dorothee Mielke
OBJECTIVE: Magnetic resonance (MR) imaging has been used for the detection of cerebral vasospasm (VSP) related infarction in experimental subarachnoid hemorrhage (eSAH) in rats. Conventional angiography is generally used to visualize VSP, which is an invasive technique with a possible increase in morbidity and mortality. In this study we evaluated the validity of MR-angiography (MRA) in detecting VSP and its feasibility to define VSP severity grades after eSAH in rats. METHODS: SAH was induced using the double-hemorrhage model in 12 rats...
2017: PloS One
https://www.readbyqxmd.com/read/28168435/is-obstructive-sleep-apnea-associated-with-the-presence-of-intracranial-cerebral-atherosclerosis
#14
Tae-Jin Song, Jung-Hyun Park, Kang Hyun Choi, Ju-Hee Kim, Yunseo Choi, Yoonkyung Chang, Hyeon Jin Kim, Jangsup Moon, Yong-Jae Kim, Hyang Woon Lee
PURPOSE: Intracranial cerebral atherosclerosis (ICAS) is one of critical atherosclerosis which closely related with stroke. Obstructive sleep apnea (OSA) is associated with systemic atherosclerosis, but it is unclear whether OSA is related with the presence of ICAS. We aimed to investigate the association between the presence of ICAS and severity of OSA in patients with suspected OSA. METHODS: This retrospective, cross-sectional study included 283 patients who suspected OSA (presence of one or more OSA-related symptom and high-risk category in Berlin questionnaire) and underwent polysomnography and brain magnetic resonance angiography (MRA)...
February 7, 2017: Sleep & Breathing, Schlaf & Atmung
https://www.readbyqxmd.com/read/28165646/simultaneous-noncontrast-angiography-and-intraplaque-hemorrhage-snap-imaging-comparison-with-contrast-enhanced-mr-angiography-for-measuring-carotid-stenosis
#15
Hongge Shu, Jie Sun, Thomas S Hatsukami, Niranjan Balu, Daniel S Hippe, Haining Liu, Ted R Kohler, Wenzhen Zhu, Chun Yuan
PURPOSE: To evaluate in a proof-of-concept study the feasibility of Simultaneous Noncontrast Angiography and intraPlaque hemorrhage (SNAP) imaging as a clinical magnetic resonance angiography (MRA) technique for measuring carotid stenosis. There is a growing interest in detecting intraplaque hemorrhage (IPH) during the clinical management of carotid disease, yet luminal stenosis has remained indispensable during clinical decision-making. SNAP imaging has been proposed as a novel IPH imaging technique that provides carotid MRA with no added scan time...
February 6, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28163256/preprocedural-mri-and-mra-in-planning-fibroid-embolization
#16
Cristina Maciel, Yen Zhi Tang, Anju Sahdev, António Miguel Madureira, Paulo Vilares Morgado
This pictorial review aims to discuss and illustrate the up-to-date use of preprocedural magnetic resonance imaging (MRI) in selecting patients and planning uterine artery embolization (UAE). The merits of magnetic resonance angiography (MRA) in demonstrating the pelvic vasculature to guide UAE are highlighted. MRI features of fibroids and their main differential diagnoses are presented. Fibroid characteristics, such as location, size, and enhancement, which may impact patient selection and outcome, are presented based on recent literature...
February 6, 2017: Diagnostic and Interventional Radiology: Official Journal of the Turkish Society of Radiology
https://www.readbyqxmd.com/read/28160261/imaging-of-the-ulcerated-carotid-atherosclerotic-plaque-a-review-of-the-literature
#17
REVIEW
Vasileios Rafailidis, Ioannis Chryssogonidis, Thomas Tegos, Konstantinos Kouskouras, Afroditi Charitanti-Kouridou
: Carotid atherosclerotic disease constitutes a major modern health problem whose diagnosis primarily relies on imaging. Grading of stenosis has been long used as the main factor for risk stratification and guiding of management. Nevertheless, increasing evidence has shown that additional plaque characteristics such as plaque composition and surface morphology play an important role in the occurrence of symptoms, justifying the term "vulnerable plaque". Carotid plaque surface characteristics either in the form of surface irregularities or ulceration represent an important factor of vulnerability and are associated with the occurrence of neurologic symptoms...
February 3, 2017: Insights Into Imaging
https://www.readbyqxmd.com/read/28155610/mineralocorticoid-antagonists-in-esrd-an-overview-of-their-efficacy-and-safety
#18
Panagiotis I Georgianos, Vasilios Vaios, Theodoros Eleftheriadis, Pantelis Zebekakis, Vassilios Liakopoulos
Add-on mineralocorticoid-receptor-antagonists (MRAs) spironolactone and eplerenone can enhance the cardioprotective action of angiotensin-converting-enzyme-inhibitors (ACEIs), angiotensin-receptor-blockers (ARBs) and/or β-blockers in non-dialysis patients with congestive heart failure (CHF) and reduced left ventricular (LV) ejection fraction. The efficacy and safety of MRAs among patients on chronic dialysis is less well studied. A growing body of evidence derived from small randomized studies suggests that MRA therapy may improve a number of surrogate cardiovascular (CV) risk factors (i...
February 1, 2017: Current Vascular Pharmacology
https://www.readbyqxmd.com/read/28152259/four-dimensional-phase-contrast-vastly-undersampled-isotropic-projection-reconstruction-4d-pc-vipr-mr-evaluation-of-the-renal-arteries-in-transplant-recipients-preliminary-results
#19
Daisuke Motoyama, Yasuo Ishii, Yasuo Takehara, Masataka Sugiyama, Wang Yang, Hatsuko Nasu, Takasuke Ushio, Yuko Hirose, Naoki Ohishi, Tetsuya Wakayama, Hiroyuki Kabasawa, Kevin Johnson, Oliver Wieben, Harumi Sakahara, Seiichiro Ozono
PURPOSE: To assess the performance of four-dimensional phase-contrast vastly undersampled isotropic projection reconstruction (4D PC-VIPR) at 3.0T in depicting intrarenal arteries compared with computed tomography angiography (CTA), and its correlation with arterial flowmetry in comparison with Doppler ultrasonography (DUS). MATERIALS AND METHODS: In our prospective single-arm study, subjects were 25 patients who underwent renal transplant-related surgery at our hospital between July 2011 and June 2015...
February 2, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28150873/dual-echo-dixon-imaging-with-a-constrained-phase-signal-model-and-graph-cuts-reconstruction
#20
Eric G Stinson, Joshua D Trzasko, Joel G Fletcher, Stephen J Riederer
PURPOSE: The purpose of this work is to derive and demonstrate constrained-phase dual-echo Dixon imaging within a maximum likelihood framework solved with a regularized graph-cuts-guided optimization. THEORY AND METHODS: Dual-echo Dixon reconstruction is fundamentally underdetermined; however, adopting a constrained-phase signal model reduces the number of unknowns and the nonlinear problem can be solved under a maximum likelihood framework. Period shifts in the field map (manifesting as fat/water signal swaps) must also be corrected...
February 2, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
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