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https://www.readbyqxmd.com/read/28066873/management-of-posterior-inferior-cerebellar-artery-aneurysms-what-factors-play-the-most-important-role-in-outcome
#1
Alena Sejkorová, Ondra Petr, Miriam Mulino, Jiří Cihlář, Aleš Hejčl, Claudius Thomé, Martin Sameš, Giuseppe Lanzino
BACKGROUND: Posterior inferior cerebellar artery (PICA) aneurysms are an uncommon, heterogeneous group of aneurysms with poorer clinical outcomes compared to other intracranial aneurysms. We performed a multicenter retrospective study to analyze the outcome in a large series of patients treated with modern microsurgical and endovascular techniques. METHODS: Records of 94 patients treated for PICA aneurysms between 2000 and 2015 at three large tertiary referral centers were retrospectively reviewed...
January 9, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28038815/circadian-variation-in-acute-myocardial-infarct-size-assessed-by-cardiovascular-magnetic-resonance-in-reperfused-stemi-patients
#2
Heerajnarain Bulluck, Jennifer Nicholas, Gabriele Crimi, Steven K White, Andrew J Ludman, Silvia Pica, Claudia Raineri, Hector A Cabrera-Fuentes, Derek Yellon, Jose Rodriguez-Palomares, David Garcia-Dorado, Derek J Hausenloy
OBJECTIVE: Clinical studies using serum cardiac biomarkers to investigate a circadian variation in acute myocardial infarct (MI) size in ST-segment elevation myocardial infarction (STEMI) patients reperfused by primary percutaneous coronary intervention (PPCI) have produced mixed results. We aimed to investigate this phenomenon using acute MI size measured by cardiovascular magnetic resonance (CMR). METHODS: Patient-level data was obtained from 4 randomized controlled trials investigating the MI-limiting effects of cardioprotective therapies in this pooled analysis...
December 19, 2016: International Journal of Cardiology
https://www.readbyqxmd.com/read/28008208/ruptured-partially-thrombosed-anterior-inferior-cerebellar-artery-aneurysms-two-case-reports-and-review-of-literature
#3
Fumiaki Kanamori, Teppei Kawabata, Shinsuke Muraoka, Takao Kojima, Tadashi Watanabe, Norikazu Hatano, Yukio Seki
Aneurysms arising from the distal anterior inferior cerebellar artery (AICA) are very rare. When the parent artery is an AICA-posterior inferior cerebellar artery (PICA) variant, occlusion of the artery, even distal to the meatal loop, leads to a significant area of cerebellar infarction. We report two cases of ruptured partially thrombosed distal AICA aneurysms. In both cases, the parent artery was an AICA-PICA variant. The aneurysms were clipped in one case and trapped following occipital artery (OA)-AICA anastomosis in another case...
December 2016: Nagoya Journal of Medical Science
https://www.readbyqxmd.com/read/28003171/a-contralateral-transcondylar-fossa-approach-with-bilateral-v3-segment-exposure-for-repairing-complex-vertebral-artery-aneurysms-a-technical-case-report
#4
Nakao Ota, Rokuya Tanikawa, Masataka Miyama, Takanori Miyazaki, Yu Kinoshita, Hidetoshi Matsukawa, Fumihiro Sakakibara, Norihiro Saito, Shiro Miyata, Kosumo Noda, Toshiyuki Tsuboi, Hiroyasu Kamiyama, Sadahisa Tokuda, Kyousuke Kamada
BACKGROUND: and Importance: Microsurgical treatment for vertebral artery aneurysms can be approached through the lateral aspect of the brainstem and cerebellum. Contralateral approach may be selected in case of complex aneurysms with tortuous running, and the intracranial vertebral artery distal to the aneurysm locates in contralateral cerebello-pontine angle. When performing the aneurysm repair, exposing the V3 segment before craniotomy is advantageous. We describe the detailed surgical procedures about contralateral transcondylar fossa approach with bilateral V3 segment exposure for the repair of a complex vertebral artery aneurysm...
December 18, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/27979647/bioaccessibility-of-u-th-and-pb-in-solid-wastes-and-soils-from-an-abandoned-uranium-mine
#5
Michael Foulkes, Geoffrey Millward, Samuel Henderson, William Blake
Bioaccessible U, Th, Pb and the (238)U decay products (214)Pb and (210)Pb have been determined, using a modified Unified BARGE Method (UBM), in waste solids and soils from an abandoned uranium mine in South West England, UK. Maximum aqua regia extractable concentrations for U, Th and Pb were 16,200, 3.8 and 4750 μg g(-1), respectively. (238)U had highest activity concentrations near the mine shaft, where the decay products(214)Pb and (210)Pb had values of 235 and 180 Bq g(-1), respectively. UBM extractions gave mean gastro-intestinal bioaccessibility factors (BAFs) for U and Pb in the waste solids of 0...
December 12, 2016: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/27974938/spontaneous-vertebral-artery-dissection-with-multiple-supratentorial-and-infratentorial-acute-infarcts-in-the-posterior-circulation-case-report
#6
Cristea I, Popa C
The article represents a case of a young patient with atypical clinical and paraclinical presentation of vertebral artery dissection by multiple cerebral infarcts, localized at the supratentorial and infratentorial levels in the posterior circulation. A case of a 21-year-old man, without a history of trauma in the cervical area or at the cranial level, without recent chiropractic maneuvers or practicing a sport, which required rapid, extreme, rotational movements of the neck, was examined. He presented to the emergency room with nausea, numbness of the left limbs, dysarthria, and incoordination of walking, with multiple objective signs at the neurological examination, which revealed right vertebral artery subacute dissection after the paraclinical investigations...
July 2016: Journal of Medicine and Life
https://www.readbyqxmd.com/read/27974932/correlations-between-the-semiologic-changes-and-the-imaging-aspects-in-the-lateral-bulbar-infarction
#7
Cristea I, Popa C
The study aimed to evaluate the correlations between the clinical and paraclinical data in the lateral bulbar infarction, benefiting from the access to the semiologic characteristics of a group studied and the MRI angiography, without a contrast agent, through the 3D TOF technique combined with MIP, as an imaging technique for the evaluation of the arterial lesion. The study group included 20 patients with lateral bulbar infarction, 14 men, and 6 women aged between 21 and 80 years, the mean age being 56, 9 years, who were enrolled in the study in the period 2012 and 2014, following the admission in the National Institute of Neurology and Neurovascular Diseases...
July 2016: Journal of Medicine and Life
https://www.readbyqxmd.com/read/27899589/through-bond-effects-in-the-ternary-complexes-of-thrombin-sandwiched-by-two-dna-aptamers
#8
Andrea Pica, Irene Russo Krauss, Valeria Parente, Hisae Tateishi-Karimata, Satoru Nagatoishi, Kouhei Tsumoto, Naoki Sugimoto, Filomena Sica
Aptamers directed against human thrombin can selectively bind to two different exosites on the protein surface. The simultaneous use of two DNA aptamers, HD1 and HD22, directed to exosite I and exosite II respectively, is a very powerful approach to exploit their combined affinity. Indeed, strategies to link HD1 and HD22 together have been proposed in order to create a single bivalent molecule with an enhanced ability to control thrombin activity. In this work, the crystal structures of two ternary complexes, in which thrombin is sandwiched between two DNA aptamers, are presented and discussed...
November 28, 2016: Nucleic Acids Research
https://www.readbyqxmd.com/read/27885534/zinc-deficiency-after-gastric-bypass-for-morbid-obesity-a-systematic-review
#9
REVIEW
Kamal K Mahawar, Aparna Govil Bhasker, Vivek Bindal, Yitka Graham, Usha Dudeja, Muffazal Lakdawala, Peter K Small
Up to 50% of patients have zinc deficiency before bariatric surgery. Roux-en-Y gastric bypass (RYGB) is the commonest bariatric procedure worldwide. It can further exacerbate zinc deficiency by reducing intake as well as absorption. The British Obesity and Metabolic Surgery Society, therefore, recommends that zinc level should be monitored routinely following gastric bypass. However, the American guidance does not recommend such monitoring for all RYGB patients and reserves it for patients with 'specific findings'...
November 24, 2016: Obesity Surgery
https://www.readbyqxmd.com/read/27869412/blood-lead-levels-in-children-aged-between-1-and-6-years-old-in-la-plata-argentina-identification-of-risk-factors-for-lead-exposure
#10
Enrique Martins, Ana Varea, Karina Hernández, Marisa Sala, Ana Girardelli, Victoria Fasano, Liliana Disalvo
INTRODUCTION: Lead has neurotoxic effects in children, even at a very low level in blood. The risk factors (RFs) for lead exposure have not been adequately identified in La Plata. The objectives of this study were to determine mean blood lead levels and identify RFs in children aged 1 to 6 years old living in La Plata and the outskirts. POPULATION AND METHODS: A cross-sectional study was conducted in children who attended primary health care centers for a health check-up...
December 1, 2016: Archivos Argentinos de Pediatría
https://www.readbyqxmd.com/read/27865050/nmr-spectroscopic-assignment-of-backbone-and-side-chain-protons-in-fully-protonated-proteins-microcrystals-sedimented-assemblies-and-amyloid-fibrils
#11
Jan Stanek, Loren B Andreas, Kristaps Jaudzems, Diane Cala, Daniela Lalli, Andrea Bertarello, Tobias Schubeis, Inara Akopjana, Svetlana Kotelovica, Kaspars Tars, Andrea Pica, Serena Leone, Delia Picone, Zhi-Qiang Xu, Nicholas E Dixon, Denis Martinez, Mélanie Berbon, Nadia El Mammeri, Abdelmajid Noubhani, Sven Saupe, Birgit Habenstein, Antoine Loquet, Guido Pintacuda
We demonstrate sensitive detection of alpha protons of fully protonated proteins by solid-state NMR spectroscopy with 100-111 kHz magic-angle spinning (MAS). The excellent resolution in the Cα-Hα plane is demonstrated for 5 proteins, including microcrystals, a sedimented complex, a capsid and amyloid fibrils. A set of 3D spectra based on a Cα-Hα detection block was developed and applied for the sequence-specific backbone and aliphatic side-chain resonance assignment using only 500 μg of sample. These developments accelerate structural studies of biomolecular assemblies available in submilligram quantities without the need of protein deuteration...
December 12, 2016: Angewandte Chemie
https://www.readbyqxmd.com/read/27837451/percutaneous-image-guided-cryoablation-current-applications-and-results-in-the-oncologic-field
#12
Roberto Luigi Cazzato, Julien Garnon, Nitin Ramamurthy, Guillaume Koch, Georgia Tsoumakidou, Jean Caudrelier, Francesco Arrigoni, Luigi Zugaro, Antonio Barile, Carlo Masciocchi, Afshin Gangi
Percutaneous imaging-guided cryoablation (PICA) is a recently developed technique, which applies extreme hypothermia to destroy tumours under close imaging surveillance. It is minimally invasive, safe, repeatable, and does not interrupt or compromise other oncologic therapies. It presents several advantages over more established heat-based thermal ablation techniques (e.g. radiofrequency ablation; RFA) including intrinsic analgesic properties, superior monitoring capability on multi-modal imaging, ability to treat larger tumours, and preservation of tissue collagenous architecture...
December 2016: Medical Oncology
https://www.readbyqxmd.com/read/27823991/quadrupole-shift-of-nuclear-magnetic-resonance-of-donors-in-silicon-at-low-magnetic-field
#13
P A Mortemousque, S Rosenius, G Pica, D P Franke, T Sekiguchi, A Truong, M P Vlasenko, L S Vlasenko, M S Brandt, R G Elliman, K M Itoh
Shifts from the expected nuclear magnetic resonance frequencies of antimony and bismuth donors in silicon of greater than a megahertz are observed in electrically detected magnetic resonance spectra. Defects created by ion implantation of the donors are discussed as the source of effective electric field gradients generating these shifts via quadrupole interaction with the nuclear spins. The experimental results are modeled quantitatively by molecular orbital theory for a coupled pair consisting of a donor and a spin-dependent recombination readout center...
November 8, 2016: Nanotechnology
https://www.readbyqxmd.com/read/27814312/impact-of-artifacts-on-vor-gain-measures-by-video-oculography-in-the-acute-vestibular-syndrome
#14
Georgios Mantokoudis, Ali S Saber Tehrani, Amy Wozniak, Karin Eibenberger, Jorge C Kattah, Cynthia I Guede, David S Zee, David E Newman-Toker
OBJECTIVE: The video head impulse test (HIT) measures vestibular function (vestibulo-ocular reflex [VOR] gain - ratio of eye to head movement), and, in principle, could be used to make a distinction between central and peripheral causes of vertigo. However, VOG recordings contain artifacts, so using unfiltered device data might bias the final diagnosis, limiting application in frontline healthcare settings such as the emergency department (ED). We sought to assess whether unfiltered data (containing artifacts) from a video-oculography (VOG) device have an impact on VOR gain measures in acute vestibular syndrome (AVS)...
November 3, 2016: Journal of Vestibular Research: Equilibrium & Orientation
https://www.readbyqxmd.com/read/27793767/ruptured-distal-posterior-inferior-cerebellar-artery-pica-aneurysms-associated-with-cerebellar-arterial-venous-malformations-avms-a-case-series-and-review-of-the-literature-demonstrating-the-need-for-angiographic-evaluation-and-feasibility-of-endovascular-treatment
#15
David Case, David Kumpe, Luis Cava, Robert Neumann, Andrew White, Christopher Roark, Joshua Seinfeld
OBJECTIVE: The characteristics, diagnosis, and preferred management strategies for distal posterior inferior cerebellar artery (PICA) aneurysms associated with cerebellar arteriovenous malformation (AVMs) are poorly understood. We present a case series with attention to aneurysm angioarchitecture, diagnostic imaging, treatment approaches, and a thorough review of the literature. With this information, we demonstrate a specific anatomical pattern for these aneurysms, an underreported need for conventional digital subtraction angiography (DSA) during evaluation, along with the utility of endovascular treatment with liquid embolic agents...
October 25, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/27766499/arteries-and-veins-of-the-cerebellum
#16
Matthieu Delion, Mickael Dinomais, Philippe Mercier
Surgery of the posterior fossa represents a technical challenge because of the proximity of the vessels of the cerebellum. If the arterial vascularization of the cerebellum is well known, the main arterial variations and the whole venous vascularization are probably under recognized. We describe the vascular organization and the main variations through photographs of colored latex perfused brains, obtained with a surgical microscope. The arterial vascularization of the cerebellum is based on three arteries which all originate from the vertebrobasilar system: the superior cerebellar artery (SCA), the anterior and inferior cerebellar artery (AICA), and the posterior and inferior cerebellar artery (PICA)...
October 20, 2016: Cerebellum
https://www.readbyqxmd.com/read/27762120/sudden-simultaneous-cerebellar-infarction-in-the-territories-of-the-medial-division-of-posterior-inferior-cerebellar-arteries
#17
K Mugundhan, Rajesh Shankar Iyer
Strokes involving posterior inferior cerebellar arteries (PICA) are rare and usually unilateral. They can involve either the lateral division or the medial division of PICA. Sudden simultaneous cerebellar infarctions in the medial PICA territories are extremely rare. We report one such patient who presented with acute bilateral cerebellar infarctions in the medial PICA territories. She was a diabetic and had features of diffuse atherosclerotic vertebrobasilar disease. We discuss the anatomical peculiarities of PICA and its blood supply along with the clinical features differentiating the medial and lateral PICA infarctions...
August 2016: Journal of the Association of Physicians of India
https://www.readbyqxmd.com/read/27722309/an-alternative-explanation-of-the-cononsolvency-of-poly-n-isopropylacrylamide-in-water-methanol-solutions
#18
Andrea Pica, Giuseppe Graziano
Cononsolvency refers to the experimental finding that poly(N-isopropylacrylamide), PNIPAM, has a coil conformation in both pure water and pure methanol, at 20 °C and 1 atm, but assumes a globule conformation in methanol-water solutions, over the 0.1 ≤ X(MeOH) ≤ 0.4 methanol molar fraction. This strange phenomenon has recently been rationalized by claiming that: (a) MeOH molecules are able to bind two distant monomers in the chain, driving collapse [Nat. Commun., 2014, 5, 4882]; (b) the preferential binding of MeOH stabilizes globule conformations due to a conformational entropy gain of the chain [J...
September 14, 2016: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/27718027/safety-and-efficacy-of-treatment-strategies-for-posterior-inferior-cerebellar-artery-aneurysms-a-systematic-review-and-meta-analysis
#19
Ondra Petr, Alena Sejkorová, Ondřej Bradáč, Waleed Brinjikji, Giuseppe Lanzino
INTRODUCTION: We conducted a systematic review of the literature to evaluate the safety and efficacy of treatment strategies for PICA aneurysms. METHODS: A systematic search of Medline, EMBASE, Scopus, and Web of Science was done for studies published through November 2015. We included studies that described treatment of PICA aneurysms with ≥10 patients. Random-effects meta-analysis was used to pool the following outcomes: complete occlusion, technical success, periprocedural morbidity/mortality, stroke rates, aneurysm recurrence/rebleed, CN palsies rates, and long-term neurological morbidity/mortality...
October 7, 2016: Acta Neurochirurgica
https://www.readbyqxmd.com/read/27702826/training-programs-on-endoscopic-scoring-systems-for-inflammatory-bowel-disease-lead-to-a-significant-increase-in-interobserver-agreement-among-community-gastroenterologists
#20
Marco Daperno, Michele Comberlato, Fabrizio Bossa, Alessandro Armuzzi, Livia Biancone, Andrea G Bonanomi, Rocco Cosintino, Giovanni Lombardi, Roberto Mangiarotti, Alfredo Papa, Roberta Pica, Luca Grassano, Guido Pagana, Renata D'Incà, Ambrogio Orlando, Fernando Rizzello
BACKGROUNDS AND AIMS: Endoscopic outcomes are increasingly used in clinical trials and in routine practice for inflammatory bowel disease [IBD] in order to reach more objective patient evaluations than possible using only clinical features. However, reproducibility of endoscopic scoring systems used to categorize endoscopic activity has been reported to be suboptimal.The aim of this study was to analyse the inter-rated agreement of non-dedicated gastroenterologists on IBD endoscopic scoring systems, and to explore the effects of a dedicated training programme on agreement...
October 4, 2016: Journal of Crohn's & Colitis
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