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ESTUDIOS


29 septiembre 2011

STROKE. Velocity Criteria for Intracranial Stenosis Revisited An International Multicenter Study of Transcranial Doppler and Digital Subtraction Angiography

Limin Zhao, MD*; Kristian Barlinn, MD*; Vijay K. Sharma, MD; Georgios Tsivgoulis, MD; Luis F. Cava, MD; Spyros N. Vasdekis, MD; Hock Luen Teoh, MD; Nikos Triantafyllou, MD; Bernard P.L. Chan, MD; Arvind Sharma, MD; Konstantinos Voumvourakis, MD; Elefterios Stamboulis, MD; Maher Saqqur, MD; Mark R. Harrigan, MD; Karen C. Albright, DO; Andrei V. Alexandrov, MD

Background and Purpose—Intracranial atherosclerotic disease is associated with a high risk of stroke recurrence. We aimed to determine accuracy of transcranial Doppler screening at laboratories that share the same standardized scanning protocol. Stroke. 2011; 42: 3429-3434 Published online before print September 29, 2011, doi: 10.1161/​STROKEAHA.111.621235. Copyright © 2011 American Heart Association, Inc. All rights reserved.

01 octubre 2012

AMERICAN JOURNAL OF NEURORADIOLOGY. Closed-Cell Stent for Coil Embolization of Intracranial Aneurysms: Clinical and Angiographic Results

A.K. Wakhloo, I. Linfante, C.F. Silva, E.A. Samaniego, G. Dabus, V. Etezadi, G. Spilberg and M.J. Gounis

BACKGROUND AND PURPOSE: Recanalization is observed in 20–40% of endovascularly treated intracranial aneurysms. To further reduce the recanalization and expand endovascular treatment, we evaluated the safety and efficacy of closed-cell SACE. Published online before print April 5, 2012, doi: 10.3174/ajnr.A3034 AJNR 2012 33: 1651-1656. Copyright © 2012 by American Journal of Neuroradiology

01 diciembre 2012

NEURORADIOLOGY. Comparison of remnant size in embolized intracranial aneurysms measured at follow-up with DSA and MRA

Zbigniew Serafin , Piotr Strześniewski, Władysław Lasek and Wojciech Beuth

Introduction: The possibility of recanalization and the need for retreatment are the most important limitations of intracranial aneurysm embolization. The purpose of the study was to compare the size of aneurysm remnants measured at follow-up with three-dimensional digital subtracted angiography (3D-DSA) and magnetic resonance angiography (MRA). NeuroradiologyA Journal Devoted to Neuroimaging and Interventional Neuroradiology. Copyright © The Author(s) 201210.1007/s00234-012-1063-3

06 octubre 2011

STROKE. Contrast Extravasation on Computed Tomography Angiography Predicts Clinical Outcome in Primary Intracerebral Hemorrhage. A Prospective Study of 139 Cases

Na Li, MD*; Yilong Wang, MD, PhD*; Wenjuan Wang, MD; Li Ma, MD; Jing Xue, MD; Karin Weissenborn, MD; Reinhard Dengler, MD; Hans Worthmann, MD; David Z. Wang, DO; Peiyi Gao, MD, PhD; Liping Liu, MD, PhD; Yongjun Wang, MD; Xingquan Zhao, MD, PhD

Background and Purpose—Several retrospective studies suggested that contrast extravasation on CT angiography predicts hematoma expansion, poor outcome, and mortality in primary intracerebral hemorrhage. We aimed to determine the predictive value of contrast extravasation on multidetector CT angiography for clinical outcome in a prospective study. Stroke. 2011; 42: 3441-3446 Published online before print October 6, 2011, doi: 10.1161/​STROKEAHA.111.623405. Copyright © 2011 American Heart Association, Inc. All rights reserved.

01 diciembre 2012

NEUROSURGERY. Early Postmarket Results After Treatment of Intracranial Aneurysms With the Pipeline Embolization Device: A US Multicenter Experience

Kan, Peter MD, MPH; Siddiqui, Adnan H. MD, PhD; Veznedaroglu, Erol MD; Liebman, Kenneth M. MD; Binning, Mandy J. MD; Dumont, Travis M. MD; Ogilvy, Christopher S. MD; Gaughen, John R. Jr MD; Mocco, J MD; Velat, Gregory J. MD; Ringer, Andrew J. MD; Welch, Babu G. MD; Horowitz, Michael B. M; Snyder, Kenneth V. MD PhD; Hopkins, L. Nelson MD; Levy, Elad I. MD

BACKGROUND: The Pipeline embolization device (PED) is the latest technology available for intracranial aneurysm treatment. OBJECTIVE: To report early postmarket results with the PED. Neurosurgery: December 2012 - Volume 71 - Issue 6 - p 1080–1088 doi: 10.1227/NEU.0b013e31827060d9. Copyright © by the Congress of Neurological Surgeons

01 noviembre 2012

AMERICAN JOURNAL OF NEURORADIOLOGY. Effectiveness of Mechanical Endovascular Thrombectomy in a Model System of Cerebrovascular Occlusion

J.Y. Chueh, A.K. Wakhloo and M.J. Gounis

BACKGROUND AND PURPOSE: A number of thrombectomy devices are currently undergoing clinical evaluation; meanwhile, various novel devices are under investigation. The aims of this study were to quantify flow restoration and the particle size distribution of the effluent pursuant to MET in an in vitro occlusion model. Published online before print May 3, 2012, doi: 10.3174/ajnr.A3103 AJNR 2012 33: 1998-2003 . Copyright © 2012 by American Journal of Neuroradiology

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

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