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ABSTRACT


06 agosto 2015

AMERICAN JOURNAL OF NEURORADIOLOGY. Meta-Analysis of CSF Diversion Procedures and Dural Venous Sinus Stenting in the Setting of Medically Refractory Idiopathic Intracranial Hypertension

S.R. Satti, L. Leishangthem and M.I. Chaudry

BACKGROUND AND PURPOSE: In medically refractory idiopathic intracranial hypertension, optic nerve sheath fenestration or CSF shunting is considered the next line of management. Venous sinus stenosis has been increasingly recognized as a treatable cause of elevated intracranial pressure in a subset of patients. In this article, we present the results of the largest meta-analysis of optic nerve sheath fenestration, CSF shunting, and dural venous sinus stenting. This is the only article that compares these procedures, to our knowledge.

23 julio 2015

AMERICAN JOURNAL OF NEURORADIOLOGY. Significance of Development and Reversion of Collaterals on MRI in Early Neurologic Improvement and Long-Term Functional Outcome after Intravenous Thrombolysis for Ischemic Stroke

M. Ichijo, E. Iwasawa, Y. Numasawa, K. Miki, S. Ishibashi, M. Tomita, H. Tomimitsu, T. Kamata, H. Fujigasaki, S. Shintani and H. Mizusawa

BACKGROUND AND PURPOSE: Predicting response to rtPA is essential in the era of endovascular therapy for stroke. The purpose of this study was to elucidate prognostic factors of early neurologic improvement and long-term outcome with respect to the development and reversion of leptomeningeal collaterals in recanalization therapy after acute ischemic stroke.

30 julio 2015

AMERICAN JOURNAL OF NEURORADIOLOGY. HydroCoils Are Associated with Lower Angiographic Recurrence Rates Than Are Bare Platinum Coils in Treatment of “Difficult-to-Treat” Aneurysms: A Post Hoc Subgroup Analysis of the HELPS Trial

W. Brinjikji, P.M. White, H. Nahser, J. Wardlaw, R. Sellar, A. Gholkar, H.J. Cloft and D.F. Kallmes

BACKGROUND AND PURPOSE: The HydroCoil Endovascular Aneurysm Occlusion and Packing Study was a randomized controlled trial that compared HydroCoils to bare platinum coils. Using data from this trial, we performed a subgroup analysis of angiographic and clinical outcomes of patients with “difficult-to-treat” aneurysms, defined as irregularly shaped and/or having a dome-to-neck ratio of <1.5.

06 agosto 2015

AMERICAN JOURNAL OF NEURORADIOLOGY. The Preventive Effect of Endovascular Treatment for Recurrent Hemorrhage in Patients with Spinal Cord Arteriovenous Malformations

Y. Niimi, H. Matsukawa, N. Uchiyama and A. Berenstein

BACKGROUND AND PURPOSE: Spinal cord AVMs represent rare and insufficiently studied pathologic entities. Embolization is thought to play an important role in the management of spinal cord AVMs. Factors for recurrent hemorrhage and the impact of endovascular treatment on prevention of recurrent hemorrhage remain to be confirmed. We aimed to assess recurrent hemorrhagic incidence of spinal cord AVMs and its prevention by endovascular treatment.

09 julio 2015

AMERICAN JOURNAL OF NEURORADIOLOGY. Histologic Analysis of Retrieved Clots in Acute Ischemic Stroke: Correlation with Stroke Etiology and Gradient-Echo MRI

S.K. Kim, W. Yoon, T.S. Kim, H.S. Kim, T.W. Heo and M.S. Park

BACKGROUND AND PURPOSE: It is unclear whether clot composition analysis is helpful to predict a stroke mechanism in acute large vessel occlusion. In addition, the relationship between early vessel signs on imaging studies and clot compositions has been poorly understood. The purpose of this study was to elucidate the relationship between clot composition and stroke etiology following mechanical thrombectomy and to investigate the effect of varied clot compositions on gradient-echo MR imaging of clots.

23 julio 2015

AMERICAN JOURNAL OF NEURORADIOLOGY. pCONus Device for the Endovascular Treatment of Wide-Neck Middle Cerebral Artery Aneurysms

B. Gory, M. Aguilar-Pérez, E. Pomero, F. Turjman, W. Weber, S. Fischer, H. Henkes and A. Biondi

BACKGROUND AND PURPOSE: Endovascular treatment of bifurcation middle cerebral artery aneurysms with a wide neck could be challenging, and many lesions are still treated by a surgical approach. The pCONus is a newly emerging device for wide-neck bifurcation intracranial aneurysms. To date, a single report on the treatment of intracranial aneurysms including all locations has been published. We report our experience with pCONus in the treatment of wide-neck MCA aneurysms.

21 mayo 2015

AMERICAN JOURNAL OF NEURORADIOLOGY. Long-Term Follow-Up Results following Elective Treatment of Unruptured Intracranial Aneurysms with the Pipeline Embolization Device

A.H.Y. Chiu, A.K. Cheung, J.D. Wenderoth, L. De Villiers, H. Rice, C.C. Phatouros, T.P. Singh, T.J. Phillips and W. McAuliffe

BACKGROUND AND PURPOSE: Numerous reports of treatment of wide-neck aneurysms by flow diverters have been published; however, long-term outcomes remain uncertain. This article reports the imaging results of unruptured aneurysms treated electively with the Pipeline Embolization Device for up to 56 months and clinical results for up to 61 months.

30 julio 2015

AMERICAN JOURNAL OF NEURORADIOLOGY. Computerized Angiographic Occlusion Rating for Ruptured Clipped Aneurysms is Superior to Subjective Occlusion Rating

A.R. Al-Schameri, G. Baltsavias, P. Winkler, M. Lunzer, M. Kral, L. Machegger, F. Weymayr, S. Emich, C. Sherif and B. Richling

BACKGROUND AND PURPOSE: The computerized occlusion rating to estimate angiographic occlusion of embolized aneurysms is superior to the subjective occlusion rating. In this study, we compared the 2 methods in the analysis of aneurysms clipped after subarachnoid hemorrhage.

02 julio 2015

AMERICAN JOURNAL OF NEURORADIOLOGY. Complications in Stent-Assisted Endovascular Therapy of Ruptured Intracranial Aneurysms and Relevance to Antiplatelet Administration: A Systematic Review

C.-W. Ryu, S. Park, H.S. Shin and J.S. Koh

BACKGROUND AND PURPOSE: Despite the increasing use of stent-assisted coiling for ruptured intracranial aneurysms, there is little consensus regarding the appropriate antiplatelet administration for this. The objectives of this systematic review were to provide an overview of complications and their association with the method of antiplatelet administration in stent-assisted coiling for ruptured intracranial aneurysms.

29 septiembre 2015

STROKE. Clinical Sciences. Poor Collateral Circulation Assessed by Multiphase Computed Tomographic Angiography Predicts Malignant Middle Cerebral Artery Evolution After Reperfusion Therapies

Alan Flores, MD, PhD; Marta Rubiera, MD, PhD; Marc Ribó, MD, PhD; Jorge Pagola, MD, PhD; David Rodriguez-Luna, MD, PhD; Marian Muchada, MD, PhD; Sandra Boned, MD; Laia Seró, MD; Estela Sanjuan, PhD; Pilar Meler, RN; Daniel Carcámo, MD; Estevo Santamarina, MD, PhD; Alejandro Tomassello, MD; Miguel Lemus, MD; Pilar Coscojuela, MD; Carlos A. Molina, MD, PhD

Background and Purpose: Collateral circulation (CC) has been associated with recanalization, infarct volume, and clinical outcome in patients undergoing acute reperfusion therapies. However, its relationship with the development to malignant middle cerebral artery infarction (mMCAi) has not been evaluated. Our aim was to determine the impact of CC using multiphase computed tomographic angiography (during the acute stroke phase in the prediction of mMCAi.

22 septiembre 2015

STROKE. Clinical Sciences. Endovascular Thrombectomy for Anterior Circulation Stroke Systematic Review and Meta-Analysis

Chester K. Yarbrough, MD, MPHS*; Charlene J. Ong, MD*; Alexander B. Beyer, MD, MPHS; Kim Lipsey, MLS; Colin P. Derdeyn, MD

Background and Purpose: Stroke affects ≈700 000 patients annually. Recent randomized controlled trials comparing endovascular thrombectomy (ET) with medical therapy, including intravenous thrombolysis (IVT) with tissue-type plasminogen activator, have shown effectiveness of ET for some stroke patients. The study objective is to evaluate the effect of ET on good outcome in stroke patients.

08 octubre 2015

STROKE. Clinical Sciences. Carotid Plaque Morphology Is Significantly Associated With Sex, Age, and History of Neurological Symptoms

Carina Wendorff, MD*; Heiko Wendorff, MD*; Jaroslav Pelisek, PhD; Pavlos Tsantilas, MD; Alexander Zimmermann, MD; Alma Zernecke, MD; Andreas Kuehnl, MD, MPH*; Hans-Henning Eckstein, MD, PhD*

Background and Purpose: The purpose of this study was to analyze the association between morphological characteristics of human carotid plaques and patient’s sex, age, and history of neurological symptoms.

06 octubre 2015

STROKE. Basic Sciences. Alteplase Reduces Downstream Microvascular Thrombosis and Improves the Benefit of Large Artery Recanalization in Stroke

Jean-Philippe Desilles, MD, MSc; Stephane Loyau, BSc; Varouna Syvannarath, MSc; Jaime Gonzalez-Valcarcel, MD; Marie Cantier, MD; Liliane Louedec, BSc; Bertrand Lapergue, MD, PhD; Pierre Amarenco, MD; Nadine Ajzenberg, MD, PhD; Martine Jandrot-Perrus, MD, PhD; Jean-Baptiste Michel, MD, PhD; Benoit Ho-Tin-Noe, PhD; Mikael Mazighi, MD, PhD

Background and Purpose: Downstream microvascular thrombosis (DMT) is known to be a contributing factor to incomplete reperfusion in acute ischemic stroke. The aim of this study was to determine the timing of DMT with intravital imaging and to test the hypothesis that intravenous alteplase infusion could reduce DMT in a transient middle cerebral artery occlusion (MCAO) rat stroke model.

17 septiembre 2015

STROKE. Brief Report. Does the Stenting Versus Aggressive Medical Therapy Trial Support Stenting for Subgroups With Intracranial Stenosis?

Helmi L. Lutsep, MD; Michael J. Lynn, MS; George A. Cotsonis, MA; Colin P. Derdeyn, MD; Tanya N. Turan, MD; David Fiorella, MD, PhD; L. Scott Janis, PhD; Bethany F. Lane, RN; Jean Montgomery, RN; Marc I. Chimowitz, MB, ChB, for the SAMMPRIS Investigators

Background and Purpose: Although the Stenting Versus Aggressive Medical Therapy for Intracranial Arterial Stenosis (SAMMPRIS) trial showed that medical therapy alone was superior to stenting plus medical therapy for preventing recurrent strokes in patients with symptomatic intracranial stenosis, we determined whether SAMMPRIS supported the use of stenting in any subpopulations of patients with symptomatic intracranial arterial stenosis.

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