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ESTUDIOS


01 diciembre 2012

NEURORADIOLOGY. Factors affecting long-term restenosis after carotid stenting for carotid atherosclerotic disease

Jai Jai Shiva Shankar, Jingwen Zhang, Marlise dos Santos , Howard Lesiuk, Ravi Mohan and Cheemun Lum

Introduction: The most significant factors leading to restenosis are yet to be described in the literature. The purpose of our study was to identify the incidence of restenosis in our patients with carotid artery stenting (CAS) for carotid atherosclerotic disease and to identify risk factors that are significantly responsible or related to the restenosis. NeuroradiologyA Journal Devoted to Neuroimaging and Interventional Neuroradiology. Copyright © Springer-Verlag 201210.1007/s00234-012-1031-y

08 septiembre 2011

STROKE. Prediction of Malignant Middle Cerebral Artery Infarction Using Computed Tomography-Based Intracranial Volume Reserve Measurements

Jens Minnerup, MD*; Heike Wersching, MD, MSc*; E. Bernd Ringelstein, MD; Walter Heindel, MD; Thomas Niederstadt, MD; Matthias Schilling, MD; Wolf-Rüdiger Schäbitz, MD; André Kemmling, MD

Background and Purpose—Early decompressive surgery in patients with malignant middle cerebral artery (MCA) infarction improves outcome. Elevation of intracranial pressure depends on both the space occupying brain edema and the intracranial volume reserve (cerebrospinal fluid [CSF]). However, CSF volume was not investigated as a predictor of malignant infarction so far. We hypothesize that assessment of CSF volume in addition to admission infarct size improves early prediction of malignant MCA infarction. Stroke. 2011; 42: 3403-3409 Published online before print September 8, 2011, doi: 10.1161/​STROKEAHA.111.619734. Copyright © 2011 American Heart Association, Inc. All rights reserved.

01 diciembre 2012

NEUROSURGERY. Cerebellar Arteriovenous Malformations: Anatomic Subtypes, Surgical Results, and Increased Predictive Accuracy of the Supplementary Grading System

Rodríguez-Hernández, Ana MD*; Kim, Helen MPH, PhD‡,§,¶; Pourmohamad, Tony MA‡,¶; Young, William L. MD*,‡,¶,‖; Lawton, Michael T. MD*,¶; for the University of California, San Francisco Arteriovenous Malformation Study Project

BACKGROUND: Anatomic diversity among cerebellar arteriovenous malformations (AVMs) calls for a classification that is intuitive and surgically informative. Selection tools like the Spetzler-Martin grading system are designed to work best with cerebral AVMs but have shortcomings with cerebellar AVMs. OBJECTIVE: To define subtypes of cerebellar AVMs that clarify anatomy and surgical management, to determine results according to subtypes, and to compare predictive accuracies of the Spetzler-Martin and supplementary systems. Neurosurgery: December 2012 - Volume 71 - Issue 6 - p 1111–1124 doi: 10.1227/NEU.0b013e318271c081. Copyright © by the Congress of Neurological Surgeons

01 septiembre 2012

AMERICAN JOURNAL OF NEURORADIOLOGY. Intravascular Frequency-Domain Optical Coherence Tomography Assessment of Atherosclerosis and Stent-Vessel Interactions in Human Carotid Arteries

M.R. Jones, G.F. Attizzani, C.A. Given II, W.H. Brooks, M.A. Costa and H.G. Bezerra

BACKGROUND AND PURPOSE: Carotid artery–related stroke is largely an embolic disease that has been correlated with inflammation, plaque rupture, and thrombus formation in “vulnerable” atherosclerotic plaque. Nevertheless, current guidelines for carotid revascularization in asymptomatic patients rely on the calculation of stenosis for risk assessment, a parameter that has been viewed with increasing skepticism. Intravascular OCT is an imaging technique that offers high axial resolution (10 μm), allowing an unprecedented micron-level assessment of human carotid plaque morphology. This observational article reports the first successful use of the newest iteration of this technology, FDOCT without balloon occlusion to assess human carotid artery disease and carotid stent-vessel interaction in vivo. Published online before print March 15, 2012, doi: 10.3174/ajnr.A3016 AJNR 2012 33: 1494-1501 . Copyright © 2012 by American Journal of Neuroradiology

01 diciembre 2012

NEURORADIOLOGY. Early and midterm results of complex cerebral aneurysms treated with Silk stent

Murat Velioglu, Osman Kizilkilic, Hakan Selcuk, Burak Kocak, Ercan Tureci, Civan Islak and Naci Kocer

Introduction: Endovascular treatment of intracranial aneurysms has been an effective treatment option. In this paper, we report our experience with the Silk stent (SS) for endovascular treatment of complex intracranial aneurysms and present periprocedural events, immediate results, delayed complications, and imaging and clinical follow-up results. NeuroradiologyA Journal Devoted to Neuroimaging and Interventional Neuroradiology. Copyright © Springer-Verlag 201210.1007/s00234-012-1051-7

06 octubre 2011

STROKE. Risk Profile of Intracranial Aneurysms. Rupture Rate Is Not Constant After Formation

Koji Sato, MD; Yuhei Yoshimoto, MD

Background and Purpose—Management of asymptomatic unruptured intracranial aneurysms remains controversial, and recent prospective follow-up studies showed that the rupture rate of small aneurysms is very low. These results are inconsistent with the finding that the majority of ruptured aneurysms in patients with subarachnoid hemorrhage are small. Stroke. 2011; 42: 3376-3381 Published online before print October 6, 2011, doi: 10.1161/​STROKEAHA.111.625871. Copyright © 2011 American Heart Association, Inc. All rights reserved.

06 octubre 2011

STROKE. Hospitalization Costs for Patients With Acute Ischemic Stroke Treated With Endovascular Embolectomy in the United States

Waleed Brinjikji, MD; David F. Kallmes, MD; Alejandro A. Rabinstein, MD; Giuseppe Lanzino, MD; Harry J. Cloft, MD, PhD

Background and Purpose—It is important to know the costs of hospitalization for patients undergoing endovascular embolectomy so that comparisons can be made with payments to hospitals. 2011; 42: 3271-3273 Published online before print October 6, 2011, doi: 10.1161/​STROKEAHA.111.618405. Copyright © 2011 American Heart Association, Inc. All rights reserved.

01 noviembre 2012

NEURORADIOLOGY. Osteoporotic vertebral compression fracture augmentation by injectable partly resorbable ceramic bone substitute (Cerament™|SPINESUPPORT): a prospective nonrandomized study

Salvatore Masala, Giovanni Nano, Stefano Marcia, Mario Muto, Francesco P. M. Fucci and Giovanni Simonetti

Introduction: This study aimed to evaluate long-term stabilizing healing effectiveness and influence on adjacent intact vertebral bodies of a new injectable partly resorbable calcium sulfate (60 wt.%)/hydroxyapatite (40 wt.%) bone substitute employed in vertebral augmentation of osteoporotic collapses. NeuroradiologyA Journal Devoted to Neuroimaging and Interventional Neuroradiology. Copyright © Springer-Verlag 201210.1007/s00234-012-1016-x

01 diciembre 2012

NEUROSURGERY. Safety and Efficacy of Intraoperative Angiography in Craniotomies for Cerebral Aneurysms and Arteriovenous Malformations: A Review of 1093 Consecutive Cases

Chalouhi, Nohra MD; Theofanis, Thana BS; Jabbour, Pascal MD; Dumont, Aaron S. MD; Gonzalez, L. Fernando MD; Starke, Robert M. MD; Dalyai, Richard T. MD; Hann, Shannon MD; Rosenwasser, Robert MD; Tjoumakaris, Stavropoula MD

BACKGROUND: In an era of indocyanine angiography, the routine use of intraoperative angiography (IOA) in the surgical treatment of aneurysms and vascular malformations is controversial. OBJECTIVE: To retrospectively assess the safety and efficacy of IOA and to determine predictors of surgical revision. Neurosurgery: December 2012 - Volume 71 - Issue 6 - p 1162–1169 doi: 10.1227/NEU.0b013e318271ebfc. Copyright © by the Congress of Neurological Surgeons

01 noviembre 2012

NEURORADIOLOGY. Manual aspiration thrombectomy through balloon-tipped guide catheter for rapid clot burden reduction in endovascular therapy for ICA L/T occlusion

Muneer Eesa, Mohammed A. Almekhlafi, Alim P. Mitha, John H. Wong and Mayank Goyal

Introduction: Timely recanalization during endovascular procedures for acute ischemic stroke can be challenging in cases with large clot burden, such as those encountered in the terminal internal carotid T- or L-type occlusion. NeuroradiologyA Journal Devoted to Neuroimaging and Interventional Neuroradiology. Copyright © Springer-Verlag 201210.1007/s00234-012-1039-3

15 septiembre 2011

STROKE. Effect of Time to Reperfusion on Clinical Outcome of Anterior Circulation Strokes Treated With Thrombectomy. Pooled Analysis of the MERCI and Multi MERCI Trials

Raul G. Nogueira, MD; Wade S. Smith, MD, PhD; Gene Sung, MD; Gary Duckwiler, MD; Gary Walker, PhD; Robin Roberts, BSc, MSc; Jeffrey L. Saver, MD; David S. Liebeskind, MD on Behalf of the MERCI and Multi MERCI Writing Committee

Background and Purpose—Previous studies have demonstrated a strong correlation between treatment time and outcomes after intravenous recombinant tissue-type plasminogen activator. However, the temporal profile of ischemia may vary according to the level of occlusion, and it is likely that more proximal occlusions have a more variable temporal course than their distal counterparts. We sought to establish how time influences outcomes in anterior circulation proximal arterial occlusions. Stroke. 2011; 42: 3144-3149 Published online before print September 15, 2011, doi: 10.1161/​STROKEAHA.111.624163. Copyright © 2011 American Heart Association, Inc. All rights reserved.

18 agosto 2011

STROKE. Prevalence and Prognosis of Asymptomatic Vertebral Artery Origin Stenosis in Patients With Clinically Manifest Arterial Disease

Annette Compter, MD; H. Bart van der Worp, MD; Ale Algra, MD; L. Jaap Kappelle, MD on behalf of the Second Manifestations of ARTerial disease (SMART) Study Group

Background and Purpose—The risk of ischemic stroke in patients with asymptomatic vertebral artery stenosis is unknown. We examined the incidence of posterior circulation ischemic stroke in patients with asymptomatic stenosis of the vertebral artery origin (VAo). Stroke. 2011; 42: 2795-2800 Published online before print August 18, 2011, doi: 10.1161/​STROKEAHA.110.612903. Copyright © 2011 American Heart Association, Inc. All rights reserved.

01 noviembre 2012

NEUROSURGERY. Radiosurgery to the Surgical Cavity as Adjuvant Therapy for Resected Brain Metastasis

Robbins, Jared R. MD; Ryu, Samuel MD; Kalkanis, Steven MD; Cogan, Chad MS; Rock, Jack MD; Movsas, Benjamin MD; Kim, Jae Ho MD; Rosenblum, Mark MD

BACKGROUND: The standard treatment of resected brain metastasis is whole-brain radiotherapy (WBRT). To avoid the potential toxicity of WBRT and to improve local control, we have used radiosurgery alone to the surgical cavity. OBJECTIVE: To demonstrate the rates of local control, new intracranial metastasis, and overall survival using this treatment scheme without WBRT. Neurosurgery: November 2012 - Volume 71 - Issue 5 - p 937–943 doi: 10.1227/NEU.0b013e31826909f2 Research-Human-Clinical Studies. Copyright © by the Congress of Neurological Surgeons

01 octubre 2012

AMERICAN JOURNAL OF NEURORADIOLOGY. The Characteristics and Risk Factors of Headache Development after the Coil Embolization of an Unruptured Aneurysm

G. Hwang, E.-A. Jeong, J.H. Sohn, H. Park, J.S. Bang, S.-C. Jin, B.C. Kim, C.W. Oh and O.-K. Kwon

BACKGROUND AND PURPOSE: Development of a headache after aneurysm coil embolization is not uncommon but has received little attention. The authors prospectively analyze the characteristics and risk factors of a headache after coiling in patients treated for an unruptured cerebral aneurysm. Published online before print April 5, 2012, doi: 10.3174/ajnr.A3018 AJNR 2012 33: 1676-1678 . Copyright © 2012 by American Journal of Neuroradiology

01 noviembre 2012

NEURORADIOLOGY. Endovascular treatment of proximal superior middle cerebral artery aneurysms

Boris Lubicz, Martina Pezzullo, Denis Brisbois, Olivier De Witte and Benjamin Mine

Introduction: Aneurysms superiorly located on the proximal segment of the middle cerebral artery (PMCAA) are rare and challenging to treat. No information is available regarding their management by endovascular approach. The aim of this study was to report our experience with endovascular treatment (EVT) of PMCAA. NeuroradiologyA Journal Devoted to Neuroimaging and Interventional Neuroradiology. Copyright © Springer-Verlag 201210.1007/s00234-012-1043-7

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