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ESTUDIOS


01 agosto 2015

STROKE. Early Recurrence and Cerebral Bleeding in Patients With Acute Ischemic Stroke and Atrial Fibrillation. Effect of Anticoagulation and Its Timing: The RAF Study

Maurizio Paciaroni, Giancarlo Agnelli, Nicola Falocci, Valeria Caso, Cecilia Becattini, Simona Marcheselli, Christina Rueckert, Alessandro Pezzini, Loris Poli, Alessandro Padovani, Laszló Csiba, Lilla Szabó, Sung-Il Sohn, Tiziana Tassinari, Azmil H. Abdul-Rahim, Patrik Michel, Maria Cordier, Peter Vanacker, Suzette Remillard, Andrea Alberti, Michele Venti, Umberto Scoditti, Licia Denti, Giovanni Orlandi, Alberto Chiti, Gino Gialdini, Paolo Bovi, Monica Carletti, Alberto Rigatelli, Jukka Putaala, Turgut Tatlisumak, Luca Masotti, Gianni Lorenzini, Rossana Tassi, Francesca Guideri, Giuseppe Martini, Georgios Tsivgoulis, Kostantinos Vadikolias, Chrissoula Liantinioti, Francesco Corea, Massimo Del Sette, Walter Ageno, Maria Luisa De Lodovici, Giorgio Bono, Antonio Baldi, Sebastiano D’Anna, Simona Sacco, Antonio Carolei, Cindy Tiseo, Monica Acciarresi, Cataldo D’Amore, Davide Imberti, Dorjan Zabzuni, Boris Doronin, Vera Volodina, Domenico Consoli, Franco Galati, Alessio Pieroni, Danilo Toni, Serena Monaco, Mario Maimone Baronello, Kristian Barlinn, Lars-Peder Pallesen, Jessica Kepplinger, Ulf Bodechtel, Johannes Gerber, Dirk Deleu, Gayane Melikyan, Faisal Ibrahim, Naveed Akhtar, Maria Giulia Mosconi, Valentina Bubba, Ilenia Silvestri and Kennedy R. Lees

Background and Purpose: The best time for administering anticoagulation therapy in acute cardioembolic stroke remains unclear. This prospective cohort study of patients with acute stroke and atrial fibrillation, evaluated (1) the risk of recurrent ischemic event and severe bleeding; (2) the risk factors for recurrence and bleeding; and (3) the risks of recurrence and bleeding associated with anticoagulant therapy and its starting time after the acute stroke.

01 agosto 2015

STROKE. Socioeconomic Inequalities in the Prescription of Oral Anticoagulants in Stroke Patients With Atrial Fibrillation

Maria Sjölander, Marie Eriksson, Kjell Asplund, Bo Norrving and Eva-Lotta Glader

Background and Purpose: Oral anticoagulants (OACs) are effective against ischemic stroke in patients with atrial fibrillation. Our aim was to investigate differences in the prescribing of OACs after ischemic stroke in patients with atrial fibrillation based on age, sex, country of birth, and socioeconomic status.

01 agosto 2015

STROKE. Methods of Implementation of Evidence-Based Stroke Care in Europe. European Implementation Score Collaboration

Antonio Di Carlo, Francesca Romana Pezzella, Alec Fraser, Francesca Bovis, Juan Baeza, Chris McKevitt, Annette Boaz, Peter Heuschmann, Charles D.A. Wolfe, Domenico Inzitari, The European Implementation Score Collaboration Study Group Coinvestigators, Vincent Thijs, Anthony Rudd, Annette Boaz, Maurice Giroud, Yannick Bejot, Silke Wiedmann, Peter Hermanek, Markus Wagner, Marzia Baldereschi, Maria Lamassa, Ilaria Romani, Patrizia Nencini, Daiva Rastenyte, Danuta Ryglewicz, Anna Czlonkowska, Maciej Niewada, Martin Dennis, Miquel Gallofré, Sonia Abilleira, Jaime Masjuan, Bo Norrving and Kjell Asplund and on behalf of the European Implementation Score Collaboration Study Group

Background and Purpose: Differences in stroke care and outcomes reported in Europe may reflect different degrees of implementation of evidence-based interventions. We evaluated strategies for implementing research evidence into stroke care in 10 European countries.

01 agosto 2015

STROKE. Predictors of Mortality in Acute Ischemic Stroke Intervention. Analysis of the North American Solitaire Acute Stroke Registry

Italo Linfante, Gail R. Walker, Alicia C. Castonguay, Guilherme Dabus, Amy K. Starosciak, Albert J. Yoo, Alex Abou-Chebl, Gavin W. Britz, Franklin A. Marden, Alexandria Alvarez, Rishi Gupta, Chun-Huan J. Sun, Coleman Martin, William E. Holloway, Nils Mueller-Kronast, Joey D. English, Tim W. Malisch, Hormozd Bozorgchami, Andrew Xavier, Ansaar T. Rai, Michael T. Froehler, Aamir Badruddin, Thanh N. Nguyen, M. Asif Taqi, Michael G. Abraham, Vallabh Janardhan, Hashem Shaltoni, Roberta Novakovic, Peng R. Chen, Ritesh Kaushal, Ashish Nanda, Mohammad A. Issa, Raul G. Nogueira and Osama O. Zaidat

Background and Purpose: Failure to recanalize predicts mortality in acute ischemic stroke. In the North American Solitaire Acute Stroke registry, we investigated parameters associated with mortality in successfully recanalized patients.

01 agosto 2015

STROKE. Chronic Kidney Disease in Patients With Lacunar Stroke. Association With Enlarged Perivascular Spaces and Total Magnetic Resonance Imaging Burden of Cerebral Small Vessel Disease

Lulu Xiao, Wenya Lan, Wen Sun, Qiliang Dai, Yunyun Xiong, Ling Li, Yan Zhou, Ping Zheng, Wenping Fan, Nan Ma, Zhiliang Guo, Xin Chen, Xia Xie, Lili Xu, Wusheng Zhu, Gelin Xu and Xinfeng Liu

Background and Purpose: The relationship between chronic kidney disease and cerebral small vessel disease (cSVD), especially enlarged perivascular spaces (EPVS), has not been fully understood. This study aimed to investigate the association of chronic kidney disease and EPVS, as well as the total burden of cSVD on magnetic resonance imaging, expressed by the simultaneous presence of multiple markers of cSVD, among patients with first-ever lacunar stroke.

10 diciembre 2015

AMERICAN JOURNAL OF NEURORADIOLOGY. Gadolinium-Based Contrast Agent Accumulation and Toxicity: An Update

J. Ramalho, R.C. Semelka, M. Ramalho, R.H. Nunes, M. AlObaidy and M. Castillo

SUMMARY: In current practice, gadolinium-based contrast agents have been considered safe when used at clinically recommended doses in patients without severe renal insufficiency. The causal relationship between gadolinium-based contrast agents and nephrogenic systemic fibrosis in patients with renal insufficiency resulted in new policies regarding the administration of these agents. After an effective screening of patients with renal disease by performing either unenhanced or reduced-dose-enhanced studies in these patients and by using the most stable contrast agents, nephrogenic systemic fibrosis has been largely eliminated since 2009. Evidence of in vivo gadolinium deposition in bone tissue in patients with normal renal function is well-established, but recent literature showing that gadolinium might also deposit in the brain in patients with intact blood-brain barriers caught many individuals in the imaging community by surprise. The purpose of this review was to summarize the literature on gadolinium-based contrast agents, tying together information on agent stability and animal and human studies, and to emphasize that low-stability agents are the ones most often associated with brain deposition.

31 marzo 2016

AMERICAN JOURNAL OF NEURORADIOLOGY. Assessment of Collateral Status by Dynamic CT Angiography in Acute MCA Stroke: Timing of Acquisition and Relationship with Final Infarct Volume

I.R. van den Wijngaard, G. Holswilder, M.J.H. Wermer, J. Boiten, A. Algra, D.W.J. Dippel, J.W. Dankbaar, B.K. Velthuis, A.M.M. Boers,i, C.B.L.M. Majoie and M.A.A. van Walderveen

BACKGROUND AND PURPOSE: Dynamic CTA is a promising technique for visualization of collateral filling in patients with acute ischemic stroke. Our aim was to describe collateral filling with dynamic CTA and assess the relationship with infarct volume at follow-up.

11 febrero 2016

AMERICAN JOURNAL OF NEURORADIOLOGY. Multicenter Prospective Trial of Stent Placement in Patients with Symptomatic High-Grade Intracranial Stenosis

P. Gao, D. Wang, Z. Zhao, Y. Cai, T. Li, H. Shi, W. Wu, W. He, L. Yin, S. Huang, F. Zhu, L. Jiao, X. Ji, A.I. Qureshi and F. Ling

BACKGROUND AND PURPOSE: On the basis of the high 1-month stroke and/or death (14.7%) rates associated with stent placement in the Stenting versus Aggressive Medical Management for Preventing Recurrent Stroke in Intracranial Stenosis trial, modifications in patient selection and procedural aspects for intracranial stent placement have been recommended. We performed a multicenter prospective single-arm trial to determine whether such modifications would result in lower rates of periprocedural stroke and/or death.

18 febrero 2016

AMERICAN JOURNAL OF NEURORADIOLOGY. Thinner Regions of Intracranial Aneurysm Wall Correlate with Regions of Higher Wall Shear Stress: A 7T MRI Study

R. Blankena, R. Kleinloog, B.H. Verweij, P. van Ooij, B. ten Haken, P.R. Luijten, G.J.E. Rinkel and J.J.M. Zwanenburg

BACKGROUND AND PURPOSE: Both hemodynamics and aneurysm wall thickness are important parameters in aneurysm pathophysiology. Our aim was to develop a method for semi-quantitative wall thickness assessment on in vivo 7T MR images of intracranial aneurysms for studying the relation between apparent aneurysm wall thickness and wall shear stress.

18 febrero 2016

AMERICAN JOURNAL OF NEURORADIOLOGY. C-Arm Conebeam CT Perfusion Imaging in the Angiographic Suite: A Comparison with Multidetector CT Perfusion Imaging

K. Niu, P. Yang, Y. Wu, T. Struffert, A. Doerfler, S. Schafer, K. Royalty, C. Strother and G.-H. Chen

BACKGROUND AND PURPOSE: Perfusion imaging in the angiography suite may provide a way to reduce time from stroke onset to endovascular revascularization of patients with large-vessel occlusion. Our purpose was to compare conebeam CT perfusion with multidetector CT perfusion.

01 octubre 2012

THE LANCET. Neurology. Reversible cerebral vasoconstriction syndrome

Dr Anne Ducros, MD

Summary: Recurrent thunderclap headaches, seizures, strokes, and non-aneurysmal subarachnoid haemorrhage can all reveal reversible cerebral vasoconstriction syndrome. This increasingly recognised syndrome is characterised by severe headaches, with or without other symptoms, and segmental constriction of cerebral arteries that resolves within 3 months. Reversible cerebral vasoconstriction syndrome is supposedly due to a transient disturbance in the control of cerebrovascular tone. More than half the cases occur post partum or after exposure to adrenergic or serotonergic drugs.

21 julio 2016

STROKE. Clinical Sciences. Sex, Smoking, and Risk for Subarachnoid Hemorrhage

Joni Valdemar Lindbohm, MD; Jaakko Kaprio, MD, PhD; Pekka Jousilahti, MD, PhD; Veikko Salomaa, MD, PhD; Miikka Korja, MD, PhD

Background and Purpose: Women are at higher risk for subarachnoid hemorrhage (SAH) than men for unknown reasons. Also cumulative effects of smoking have been neglected among prospective studies. We studied associations between smoking habits and SAH and interactions between known SAH risk factors in a prospective population-based study.

12 julio 2016

STROKE. Clinical Sciences. Underutilization of Ambulatory ECG Monitoring After Stroke and Transient Ischemic Attack. Missed Opportunities for Atrial Fibrillation Detection

Jodi D. Edwards, PhD; Moira K. Kapral, MD; Jiming Fang, PhD; Gustavo Saposnik, MD; David J. Gladstone, MD, PhD; Investigators of the Registry of the Canadian Stroke Network

Background and Purpose: Detection and treatment of atrial fibrillation is a major goal in secondary stroke prevention. Guidelines recommend at least 24 hours of ECG monitoring after stroke. However, it is unclear how often this is done in routine practice.

30 junio 2016

STROKE. Clinical Sciences. Field Assessment Stroke Triage for Emergency Destination. A Simple and Accurate Prehospital Scale to Detect Large Vessel Occlusion Strokes

Fabricio O. Lima, MD, MPH, PhD; Gisele S. Silva, MD, MPH, PhD; Karen L. Furie, MD, MPH; Michael R. Frankel, MD; Michael H. Lev, MD; Érica C.S. Camargo, MD, PhD, MSc; Diogo C. Haussen, MD; Aneesh B. Singhal, MD; Walter J. Koroshetz, MD; Wade S. Smith, MD; Raul G. Nogueira, MD

Background and Purpose: Patients with large vessel occlusion strokes (LVOS) may be better served by direct transfer to endovascular capable centers avoiding hazardous delays between primary and comprehensive stroke centers. However, accurate stroke field triage remains challenging. We aimed to develop a simple field scale to identify LVOS.

14 julio 2016

STROKE. Brief Report. Prestroke Vascular Pathology and the Risk of Recurrent Stroke and Poststroke Dementia

Marileen L.P. Portegies, MD; Frank J. Wolters, MD; Albert Hofman, MD, PhD; M. Kamran Ikram, MD, PhD; Peter J. Koudstaal, MD, PhD; M. Arfan Ikram, MD, PhD

Background and Purpose: Improved short-term survival after stroke has necessitated quantifying risk and risk factors of long-term sequelae after stroke (ie, recurrent stroke and dementia). This risk may be influenced by exposure to cardiovascular risk factors before the initial stroke. Within the population-based Rotterdam Study, we determined the long-term risk of recurrent stroke and dementia, and the proportion of recurrent strokes and poststroke dementia cases that are attributable to prestroke cardiovascular risk factors (ie, the population attributable risk).

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