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https://www.readbyqxmd.com/read/29755801/central-hypoventilation-a-rare-complication-of-wallenberg-syndrome
#1
Keithan Sivakumar, Manveer Garcha, Dev Mehta, Megan C Leary, Hussam A Yacoub
Central alveolar hypoventilation disorders denote conditions resulting from underlying neurologic disorders affecting the sensors, the central controller, or the integration of those signals leading to insufficient ventilation and reduction in partial pressures of oxygen. We report a patient who presented with a left lateral medullary ischemic stroke after aneurysm repair who subsequently developed a rare complication of CAH. Increased awareness of this condition's clinical manifestations is crucial to make an accurate diagnosis and understand its complications and prognosis...
2018: Case Reports in Neurological Medicine
https://www.readbyqxmd.com/read/29664421/n-type-doping-and-morphology-of-gaas-nanowires-in-aerotaxy
#2
Wondwosen Metaferia, Sudhakar Sivakumar, Axel R Persson, Irene Geijselaers, L Reine Wallenberg, Knut Deppert, Lars Samuelson, Martin Magnusson
Controlled doping in semiconductor nanowires modifies their electrical and optical properties, which are important for high efficiency optoelectronic devices. We have grown n-type (Sn) doped GaAs nanowires in Aerotaxy, a new continuous gas phase mass production technique. The morphology of Sn doped nanowires is found to be a strong function of dopant, tetraethyltin to trimethylgallium flow ratio, Au-Ga-Sn alloying, and nanowire growth temperatures. High temperature and high flow ratios result in low morphological quality nanowires and in parasitic growth on the wire base and surface...
April 17, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29661907/teaching-neuroimages-facial-ulceration-in-stroke-an-unusual-and-lesser-known-complication-described-by-wallenberg
#3
Liau MeiQi May, Tan Natalie Soong Hui, Tan Lixian Chris, Joy Vijayan, Nisha Suyien Chandran
No abstract text is available yet for this article.
April 17, 2018: Neurology
https://www.readbyqxmd.com/read/29627941/false-negative-diagnostic-imaging-of-wallenberg-s-syndrome-by-diffuse-weighted-imaging-a-case-report-and-literature-review
#4
Yanbin Wang, Yao Liu, Yu Wang, Yuchen Li, Pei Wu, Huaizhang Shi
Here, we report a case of a 64-year-old female with acute-onset vertigo, nausea, and vomiting. In an emergency imaging examination, the results of computed tomography (CT) and diffusion weighted imaging (DWI) were negative. However, on 1 day post-hospital admission, a small acute infarct in the posterolateral aspect of the left medulla was detected by DWI. Extra attention should be payed to the false-negative imaging results to avoid diagnosis and treatment delay.
April 7, 2018: Neurological Sciences
https://www.readbyqxmd.com/read/29598906/posterior-meningeal-artery-origin-patterns-among-300-cases-and-their-clinical-importance
#5
Tomotaka Ohshima, Takashi Handa, Kojiro Ishikawa, Shigeru Miyachi, Naoki Matsuo, Reo Kawaguchi, Masakazu Takayasu
BACKGROUND AND PURPOSE: The posterior meningeal artery (PMA) is known as a dura mater-nourishing vessel. We encountered a patient with Wallenberg syndrome during transarterial embolization of the PMA associated with the dural arteriovenous fistula (DAVF). METHODS: After development of Wallenberg syndrome in the patient, we assessed origins of the PMA patterns in 300 cases and divided them into 3 types. CASE PRESENTATION: A 63-year-old man was incidentally diagnosed as having transverse-sigmoid sinus DAVF with a cortical venous reflux...
March 26, 2018: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/29404361/double-conduction-through-the-atrioventricular-node-following-acute-medullary-infarction-a-case-report
#6
Salem A Salem, Nadish Garg, Raed Abu Shama, Sunil Jha, Showkat Haji, Muhammed Shahreyar, Devarshi Ardeshna
Lateral medullary syndrome (LMS), also known as Wallenberg's syndrome, PICA syndrome, results from occlusion of the posterior inferior cerebellar artery, with associated infarction of parts of medulla oblongata, and cerebellum on the ipsilateral side. It often manifests as various patterns of sensory, motor, and autonomic deficits. While sensorimotor dysfunction presents as a predicted pattern of clinical signs and symptoms, autonomic dysfunction is usually less clinically apparent, and can be easily mistaken as a concomitant pathology in the end organ it affects...
January 2018: Annals of Translational Medicine
https://www.readbyqxmd.com/read/29290907/morphological-alterations-and-redox-changes-associated-with-hepatic-warm-ischemia-reperfusion-injury
#7
Rim Jawad, Melroy D'souza, Lisa Arodin Selenius, Marita Wallenberg Lundgren, Olof Danielsson, Greg Nowak, Mikael Björnstedt, Bengt Isaksson
AIM: To study the effects of warm ischemia-reperfusion (I/R) injury on hepatic morphology at the ultrastructural level and to analyze the expression of the thioredoxin (TRX) and glutaredoxin (GRX) systems. METHODS: Eleven patients undergoing liver resection were subjected to portal triad clamping (PTC). Liver biopsies were collected at three time points; first prior to PTC (baseline), 20 min after PTC (post-ischemia) and 20 min after reperfusion (post-reperfusion)...
December 8, 2017: World Journal of Hepatology
https://www.readbyqxmd.com/read/28878917/management-of-a-patient-with-opalski-s-syndrome-in-intensive-care-unit
#8
Ozer Aynaci, Funda Gok, Alper Yosunkaya
Opalski syndrome is a rare vascular brainstem syndrome which is accepted as a variant of Wallenberg syndrome. Opalski syndrome should be considered in acute conditions in which typical symptoms of lateral medullary infarct are accompanied by ipsilateral hemiparesis. Other brain stem syndromes are distinguished from Opalski syndrome by the presence of contralateral hemiparesis.
September 2017: Clinical Case Reports
https://www.readbyqxmd.com/read/28874420/the-evolution-of-the-use-of-%C3%AE-blockers-to-treat-heart-failure-a-conversation-with-finn-waagstein-md
#9
Finn Waagstein, John D Rutherford
Finn Waagstein was born in Copenhagen in 1938. He graduated from Aarhus University Medical School in 1964. He received his cardiology training in the Sahlgrenska University Hospital at the University of Gothenburg, Sweden. He was appointed Associate Professor in 1980, and he assisted in establishing and directing the first Swedish heart transplant program. From 1990 he directed the heart failure and cardiomyopathy research programs. He is currently Professor of Cardiology and senior physician at Wallenberg Laboratory...
September 5, 2017: Circulation
https://www.readbyqxmd.com/read/28873310/vertical-inas-ingaas-heterostructure-metal-oxide-semiconductor-field-effect-transistors-on-si
#10
Olli-Pekka Kilpi, Johannes Svensson, Jun Wu, Axel R Persson, Reine Wallenberg, Erik Lind, Lars-Erik Wernersson
III-V compound semiconductors offer a path to continue Moore's law due to their excellent electron transport properties. One major challenge, integrating III-V's on Si, can be addressed by using vapor-liquid-solid grown vertical nanowires. InAs is an attractive material due to its superior mobility, although InAs metal-oxide-semiconductor field-effect transistors (MOSFETs) typically suffer from band-to-band tunneling caused by its narrow band gap, which increases the off-current and therefore the power consumption...
October 11, 2017: Nano Letters
https://www.readbyqxmd.com/read/28768356/-singultus-diagnostic-workup-and-therapy
#11
Ohlrich Marcus, Georg Royl
A hiccup is a reflex movement with diffusely distributed afferents and efferents in the thorax; its functional relevance is controversial. In its physiological form, it is mostly a minor complaint that stops spontaneously and rarely leads to medical consultation. However, prolonged agonizing hiccups represent serious deterioration of quality of life. Chronic hiccups by definition last for more than 48 h, with gastroesophageal reflux being the frequent underlying disease. Various other causes affect multiple organ systems, some with serious underlying diseases...
July 2017: Laryngo- Rhino- Otologie
https://www.readbyqxmd.com/read/28671880/an-unusual-presentation-of-tapia-syndrome-mimicking-a-partial-wallenberg-syndrome-following-anterior-cervical-spine-surgery
#12
Mena G Kerolus, Mazda K Turel, John E O'Toole
No abstract text is available yet for this article.
June 30, 2017: Journal of Neurosurgical Anesthesiology
https://www.readbyqxmd.com/read/28664015/central-hypoventilation-syndrome-complicated-with-lateral-medullary-infarction-after-endovascular-treatment-of-the-vertebral-artery-dissecting-aneurysm-a-case-report
#13
Katsuhiro Tanaka, Hideki Kanamaru, Atsunori Morikawa, Kenji Kawaguchi
Lateral medullary infarction rarely leads to central hypoventilation syndrome (CHS). CHS is a life-threatening disorder characterized by hypoventilation during sleep. We report the first case of CHS as a complication of lateral medullary infarction after endovascular treatment. A 65-year-old man presented twice with severe headache. Computed tomography revealed subarachnoid hemorrhage and cerebral angiography showed a right vertebral dissecting aneurysm involving the posterior inferior cerebellar artery. After emergent endovascular patent artery occlusion, he developed Wallenberg syndrome and experienced apnea and a conscious disturbance episode due to CHS on postoperative days 6 and 16...
October 2016: NMC case report journal
https://www.readbyqxmd.com/read/28638033/-the-biomarkers-of-cerebral-ischemia-as-a-new-method-for-the-validation-of-the-efficacy-of-cytoprotective-therapy
#14
S A Dambinova, K T Aliev, E V Bondarenko, G V Ponomarev, A A Skoromets, A P Skoromets, T A Skoromets, D G Smolko, M V Shumilina
AIM: To study blood plasma concentrations of NR2-peptide in patients with ischemic stroke (IS) to assess its diagnostic value as a biomarker of cerebral ischemia and determine the dynamics of the biomarker during treatment with cortexin. MATERIAL AND METHODS: One hundred and twenty patients, aged from 18 to 70 years, including 36 with transient ischemic attack (TIA) and 84 with IS in the carotid territory (n=70) and vertebral/basilar territory with the Wallenberg-Zakharchenko syndrome (n=14), were enrolled...
2017: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
https://www.readbyqxmd.com/read/28613894/individual-defects-in-inas-ingaassb-gasb-nanowire-tunnel-field-effect-transistors-operating-below-60-mv-decade
#15
Elvedin Memisevic, Markus Hellenbrand, Erik Lind, Axel R Persson, Saurabh Sant, Andreas Schenk, Johannes Svensson, Lars-Erik Wernersson, Lars Reine Wallenberg
Tunneling Field-Effect Transistors (TunnelFET), a leading steep-slope transistor candidate, is still plagued by defect response and there is a large discrepancy between measured and simulated device performance. In this work, highly scaled InAs-InxGa1-xAsySb1-y-GaSb vertical nanowire TunnelFET with ability to operate well below 60 mV/decade at technically relevant currents are fabricated and characterized. The structure, composition, and strain is characterized using transmission electron microscopy with emphasis on the heterojunction...
June 14, 2017: Nano Letters
https://www.readbyqxmd.com/read/28601473/neurofilament-light-protein-in-blood-as-a-potential-biomarker-of-neurodegeneration-in-huntington-s-disease-a-retrospective-cohort-analysis
#16
Lauren M Byrne, Filipe B Rodrigues, Kaj Blennow, Alexandra Durr, Blair R Leavitt, Raymund A C Roos, Rachael I Scahill, Sarah J Tabrizi, Henrik Zetterberg, Douglas Langbehn, Edward J Wild
BACKGROUND: Blood biomarkers of neuronal damage could facilitate clinical management of and therapeutic development for Huntington's disease. We investigated whether neurofilament light protein NfL (also known as NF-L) in blood is a potential prognostic marker of neurodegeneration in patients with Huntington's disease. METHODS: We did a retrospective analysis of healthy controls and carriers of CAG expansion mutations in HTT participating in the 3-year international TRACK-HD study...
August 2017: Lancet Neurology
https://www.readbyqxmd.com/read/28567027/transient-vestibulopathy-in-wallenberg-s-syndrome-pathologic-analysis
#17
Jorge C Kattah, Ali S Saber Tehrani, Sigrun Roeber, Meena Gujrati, Sarah E Bach, David E Newman Toker, Ari M Blitz, Anja K E Horn
OBJECTIVE: To report an unusual lateral medullary stroke (LMS) associated with transient unidirectional horizontal, nystagmus, and decreased horizontal vestibulo-ocular reflex (h-VOR) gain that mimicked a peripheral vestibulopathy. MRI suggested involvement of caudal medial vestibular nucleus (MVN); however, the rapid resolution of the nystagmus and improved h-VOR gain favored transient ischemia without infarction. Decreased h-VOR gain is expected with peripheral vestibular lesions within the labyrinth or superior vestibular nerve; less frequently lateral pontine strokes involving the vestibular root entry, the vestibular fascicle, or neurons within the MVN may be responsible...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28422334/polymer-supported-palladium-ii-carbene-complexes-catalytic-activity-recyclability-and-selectivity-in-c-h-acetoxylation-of-arenes
#18
Maitham H Majeed, Payam Shayesteh, L Reine Wallenberg, Axel R Persson, Niclas Johansson, Lei Ye, Joachim Schnadt, Ola F Wendt
Heterogeneous catalysts for selective oxidation of C-H bonds were synthesized by co-polymerization of new N-heterocyclic carbene-palladium(II) (NHC-PdII ) monomers with divinylbenzene. The polymer-supported NHC-PdII -catalysed undirected C-H acetoxylation of simple and methylated arenes as well as polyarenes, with similar or superior efficiency compared to their homogeneous analogues. In particular, the regioselectivity has been improved in the acetoxylation of biphenyl and naphthalene compared to the best homogeneous catalysts...
June 22, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28303385/after-effects-of-cerebellar-continuous-theta-burst-stimulation-on-reflexive-saccades-and-smooth-pursuit-in-humans
#19
Silvia Colnaghi, P Colagiorgio, S Ramat, E D'Angelo, G Koch, M Versino
The use of cerebellar repetitive transcranial magnetic stimulation has been attempted for perturbing reflexive and voluntary eye movements, but discrepancies are seen between the results of distinct studies possibly due to the different stimulation sites, intensities, and paradigms. We describe the after effects of 20 and 40 s continuous Theta Burst Stimulation (cTBS) as compared to sham stimulation, applied over the lateral cerebellar vermis and paravermis on Reflexive Saccades (RS) and Smooth Pursuit (SP) eye movements, recorded in the 30 min following stimulation...
August 2017: Cerebellum
https://www.readbyqxmd.com/read/28293537/a-rare-case-of-concomitant-sicca-keratopathy-and-ipsilateral-central-facial-palsy-in-wallenberg-s-dorsolateral-medullary-syndrome
#20
Deborah De Bruyn, Elisabeth Van Aken, Kristien Herman
Objective: To describe a patient with a right-sided supranuclear facial palsy and concomitant sicca keratopathy of the right eye following right-sided dorsolateral medullary infarction. Methods: Our patient underwent a complete ophthalmologic and neurologic examination including biomicroscopy, fundus examination, cranial nerve examination, Shirmer I test, and magnetic resonance imaging of the brain. Results: A 61-year-old woman presented in emergency with a central facial nerve palsy on the right side and truncal ataxia...
2017: GMS Ophthalmology Cases
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