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Neuroradiology Stroke

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121 papers 25 to 100 followers Articles about stroke and vascular pathology for the neuroradiologist.
By Sebastian Bravo-Grau Neuroradiology Fellow - Radiologist
Shinjiro Tominari, Akio Morita, Toshihiro Ishibashi, Tomosato Yamazaki, Hiroyuki Takao, Yuichi Murayama, Makoto Sonobe, Masahiro Yonekura, Nobuhito Saito, Yoshiaki Shiokawa, Isao Date, Teiji Tominaga, Kazuhiko Nozaki, Kiyohiro Houkin, Susumu Miyamoto, Takaaki Kirino, Kazuo Hashi, Takeo Nakayama
OBJECTIVE: To build a prediction model that estimates the 3-year rupture risk of unruptured saccular cerebral aneurysms. METHODS: Survival analysis was done using each aneurysm as the unit for analysis. Derivation data were from the Unruptured Cerebral Aneurysm Study (UCAS) in Japan. It consists of patients with unruptured cerebral aneurysms enrolled between 2000 and 2004 at neurosurgical departments at tertiary care hospitals in Japan. The model was presented as a scoring system, and aneurysms were classified into 4 risk grades by predicted 3-year rupture risk: I, < 1%; II, 1 to 3%; III, 3 to 9%, and IV, >9%...
June 2015: Annals of Neurology
T Hong, J E Park, F Ling, K G terBrugge, M Tymianski, H Q Zhang, T Krings
BACKGROUND AND PURPOSE: Spinal arteriovenous shunts below the conus constitute 3 types of lesions, which have previously been mainly described in case reports, given their rarity, and are sometimes misdiagnosed. The purpose of this study was to describe the features of each type and compare these types as to epidemiologic features, clinical and radiologic presentations, treatment, and outcomes in a consecutive series of 48 cases. MATERIALS AND METHODS: The prospectively collected data bases of 2 referral centers for spinal vascular lesions were retrospectively reviewed...
November 24, 2016: AJNR. American Journal of Neuroradiology
Dominik Nörenberg, Hans U Ebersberger, Gerd Diederichs, Bernd Hamm, René M Botnar, Marcus R Makowski
UNLABELLED: Molecular imaging aims to improve the identification and characterization of pathological processes in vivo by visualizing the underlying biological mechanisms. Molecular imaging techniques are increasingly used to assess vascular inflammation, remodeling, cell migration, angioneogenesis and apoptosis. In cardiovascular diseases, molecular magnetic resonance imaging (MRI) offers new insights into the in vivo biology of pathological vessel wall processes of the coronary and carotid arteries and the aorta...
March 2016: European Radiology
Sarah Power, Charles Matouk, Leanne K Casaubon, Frank L Silver, Timo Krings, David J Mikulis, Daniel M Mandell
BACKGROUND AND PURPOSE: The aim of the study was to determine the effects of thromboembolism and mechanical thrombectomy on the vessel wall magnetic resonance imaging (VW-MRI) appearance of the intracranial arterial wall. METHODS: This was a cross-sectional study of consecutive patients with acute intracranial arterial occlusion who underwent high-resolution contrast-enhanced VW-MRI within days of stroke presentation. For each patient, we categorized arterial wall thickening and enhancement as definite, possible, or none using contralateral arteries as a reference standard...
August 2014: Stroke; a Journal of Cerebral Circulation
Mahmud Mossa-Basha, Adam de Havenon, Kyra J Becker, Danial K Hallam, Michael R Levitt, Wendy A Cohen, Daniel S Hippe, Matthew D Alexander, David L Tirschwell, Thomas Hatsukami, Catherine Amlie-Lefond, Chun Yuan
BACKGROUND AND PURPOSE: Although studies have evaluated the differential imaging of moyamoya disease and atherosclerosis, none have investigated the added value of vessel wall magnetic resonance imaging (MRI). This study evaluates the added diagnostic value of vessel wall MRI in differentiating moyamoya disease, atherosclerotic-moyamoya syndrome (A-MMS), and vasculitic-MMS (V-MMS) with a multicontrast protocol. METHODS: We retrospectively reviewed the carotid artery territories of patients with clinically defined vasculopathies (moyamoya disease, atherosclerosis, and vasculitis) and steno-occlusive intracranial carotid disease...
July 2016: Stroke; a Journal of Cerebral Circulation
Xing-ju Liu, Shuo Wang, Yuan-li Zhao, Mario Teo, Peng Guo, Dong Zhang, Rong Wang, Yong Cao, Xun Ye, Shuai Kang, Ji-Zong Zhao
OBJECTIVE: To determine whether the risk of arteriovenous malformation (AVM) rupture is increased during pregnancy and puerperium. METHODS: Participants included 979 female patients with intracranial AVM admitted to Beijing Tiantan Hospital between 1960 and 2010. Two neurosurgery residents reviewed medical records for each case. Of them, 393 patients with ruptured AVM between 18 and 40 years of age were used for case-crossover analysis. Number of children born and clinical information during pregnancy and puerperium were retrieved to identify whether AVM rupture occurred during this period...
May 20, 2014: Neurology
Young-Jun Lee, Karel G Terbrugge, Guillaume Saliou, Timo Krings
BACKGROUND AND PURPOSE: As a result of the rarity of spinal cord arteriovenous malformations (AVM), there are only a few series available that describe clinical features, outcome after treatment, and natural history of these lesions. In this article, we aim to describe our experience with both nidus- and fistulous-type spinal cord AVMs. METHODS: Forty-four consecutive patients with spinal cord AVMs were retrospectively reviewed. There were 26 patients with a nidus-type and 18 patients with a fistulous-type AVM...
September 2014: Stroke; a Journal of Cerebral Circulation
Dale Ding, Robert M Starke, Hideyuki Kano, David Mathieu, Paul Huang, Douglas Kondziolka, Caleb Feliciano, Rafael Rodriguez-Mercado, Luis Almodovar, Inga S Grills, Danilo Silva, Mahmoud Abbassy, Symeon Missios, Gene H Barnett, L Dade Lunsford, Jason P Sheehan
BACKGROUND AND PURPOSE: The benefit of intervention for patients with unruptured cerebral arteriovenous malformations (AVMs) was challenged by results demonstrating superior clinical outcomes with conservative management from A Randomized Trial of Unruptured Brain AVMs (ARUBA). The aim of this multicenter, retrospective cohort study is to analyze the outcomes of stereotactic radiosurgery for ARUBA-eligible patients. METHODS: We combined AVM radiosurgery outcome data from 7 institutions participating in the International Gamma Knife Research Foundation...
February 2016: Stroke; a Journal of Cerebral Circulation
Julius Griauzde, Ashok Srinivasan
The diagnosis of vascular lesions of the head and neck should be directed by classifying the lesions as tumors or malformations and by determining their flow characteristics. Location of the lesion is key when differentiating between vascular neoplasms. Ultrasonography is an appropriate screening tool; MRI is often used to confirm the diagnosis. Computed tomography can be used for further characterization of the lesion, particularly when there is bony involvement. In many cases, vascular lesions grow to be extensive...
January 2015: Radiologic Clinics of North America
Jason B Pond, Richard A Suss, Harold D Scott, David P Chason
No abstract text is available yet for this article.
March 2015: Radiographics: a Review Publication of the Radiological Society of North America, Inc
J S Whang, M Kolber, D K Powell, E Libfeld
The signal pattern of intracranial haemorrhage on diffusion-weighted imaging (DWI) as it evolves over time is rarely discussed due to the sensitivity of T2*-weighted sequences and the specificity of classic signal patterns on T1 and T2-weighted sequences. The DWI signal is strongly affected by the magnetic susceptibility of paramagnetic blood products and, therefore, is markedly hypointense in the same phases that demonstrate hypointensity on T2*-weighted sequences; however, hyperacute haemorrhage (oxyhaemoglobin-predominant clot) and late subacute haemorrhage (extracellular methaemoglobin) do not demonstrate T2* hypointensity...
August 2015: Clinical Radiology
Behroze A Vachha, Pamela W Schaefer
Neuroimaging plays a key role in the initial work-up of patients with symptoms of acute stroke. Understanding the advantages and limitations of available CT and MR imaging techniques and how to use them optimally in the emergency setting is crucial for accurately making the diagnosis of acute stroke and for rapidly determining appropriate treatment.
July 2015: Radiologic Clinics of North America
K M Bond, W Brinjikji, M H Murad, D F Kallmes, H J Cloft, G Lanzino
BACKGROUND AND PURPOSE: Endovascular treatment of intracranial aneurysms is associated with the risk of thromboembolic ischemic complications. Many of these events are asymptomatic and identified only on diffusion-weighted imaging. We performed a systematic review and meta-analysis to study the incidence of DWI positive for thromboembolic events following endovascular treatment of intracranial aneurysms. MATERIALS AND METHODS: A comprehensive literature search identified studies published between 2000 and April 2016 that reported postprocedural DWI findings in patients undergoing endovascular treatment of intracranial aneurysms...
November 17, 2016: AJNR. American Journal of Neuroradiology
Orlando Diaz, Robert Scranton
Cerebral arteriovenous malformations (AVM) are tangles of blood vessels that permit shunting of blood from the arterial to venous phase without intervening capillaries. The malformation's arterialization of a low-pressure system creates a risk of rupture that is substantially higher when associated with an aneurysm. The annual hemorrhage rate is 2.2% per year as reported in the randomized trial of unruptured brain AVMs (ARUBA; rupture risk is increased after the first event. Ruptured AVMs have a 10% mortality rate and 20%-30% morbidity rate...
2016: Handbook of Clinical Neurology
J P Mohr, Michael K Parides, Christian Stapf, Ellen Moquete, Claudia S Moy, Jessica R Overbey, Rustam Al-Shahi Salman, Eric Vicaut, William L Young, Emmanuel Houdart, Charlotte Cordonnier, Marco A Stefani, Andreas Hartmann, Rüdiger von Kummer, Alessandra Biondi, Joachim Berkefeld, Catharina J M Klijn, Kirsty Harkness, Richard Libman, Xavier Barreau, Alan J Moskowitz
BACKGROUND: The clinical benefit of preventive eradication of unruptured brain arteriovenous malformations remains uncertain. A Randomised trial of Unruptured Brain Arteriovenous malformations (ARUBA) aims to compare the risk of death and symptomatic stroke in patients with an unruptured brain arteriovenous malformation who are allocated to either medical management alone or medical management with interventional therapy. METHODS: Adult patients (≥18 years) with an unruptured brain arteriovenous malformation were enrolled into this trial at 39 clinical sites in nine countries...
February 15, 2014: Lancet
Andrew J Molyneux, Richard S C Kerr, Ly-Mee Yu, Mike Clarke, Mary Sneade, Julia A Yarnold, Peter Sandercock
BACKGROUND: Two types of treatment are being used for patients with ruptured intracranial aneurysms: endovascular detachable-coil treatment or craniotomy and clipping. We undertook a randomised, multicentre trial to compare these treatments in patients who were suitable for either treatment because the relative safety and efficacy of these approaches had not been established. Here we present clinical outcomes 1 year after treatment. METHODS: 2143 patients with ruptured intracranial aneurysms, who were admitted to 42 neurosurgical centres, mainly in the UK and Europe, took part in the trial...
September 3, 2005: Lancet
Andrew J Molyneux, Richard S C Kerr, Jacqueline Birks, Najib Ramzi, Julia Yarnold, Mary Sneade, Joan Rischmiller
BACKGROUND: Our aim was to assess the long-term risks of death, disability, and rebleeding in patients randomly assigned to clipping or endovascular coiling after rupture of an intracranial aneurysm in the follow-up of the International Subarachnoid Aneurysm Trial (ISAT). METHODS: 2143 patients with ruptured intracranial aneurysms were enrolled between 1994 and 2002 at 43 neurosurgical centres and randomly assigned to clipping or coiling. Clinical outcomes at 1 year have been previously reported...
May 2009: Lancet Neurology
David O Wiebers, J P Whisnant, J Huston, I Meissner, R D Brown, D G Piepgras, G S Forbes, K Thielen, D Nichols, W M O'Fallon, J Peacock, L Jaeger, N F Kassell, G L Kongable-Beckman, J C Torner
BACKGROUND: The management of unruptured intracranial aneurysms is controversial. Investigators from the International Study of Unruptured Intracranial Aneurysms aimed to assess the natural history of unruptured intracranial aneurysms and to measure the risk associated with their repair. METHODS: Centres in the USA, Canada, and Europe enrolled patients for prospective assessment of unruptured aneurysms. Investigators recorded the natural history in patients who did not have surgery, and assessed morbidity and mortality associated with repair of unruptured aneurysms by either open surgery or endovascular procedures...
July 12, 2003: Lancet
Peng Liu, Haikun Qi, Aihua Liu, Xianli Lv, Yuhua Jiang, Xihai Zhao, Rui Li, Bing Lu, Ming Lv, Huijun Chen, Youxiang Li
BACKGROUND AND PURPOSE: Aneurysmal wall enhancement (AWE) has emerged as a new possible biomarker for depicting inflammation of the intracranial aneurysm (IA). However, the relationships of AWE with other risk factors are still unclear for unruptured IA. The purpose of this study was to investigate the association between AWE and other risk metrics. METHODS: Forty-eight patients with unruptured saccular IAs diagnosed by digital subtraction angiography were recruited to undergo magnetic resonance (MR) black-blood imaging...
October 2016: Interventional Neuroradiology
K A Choudhari
No abstract text is available yet for this article.
December 2006: British Journal of Neurosurgery
2016-11-21 21:27:19
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