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. Copyright © 2012 American Society of Neuroradiology
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. Copyright © 2012 American Society of Neuroradiology
Stroke is the third-leading cause of death in the United States, Canada, Europe, and Japan. According to American Heart Association statistics, there are now 795 000 new strokes each year, resulting in 200 000 deaths, or 1 of every 16 deaths, per year in the United States.1 Ischemic stroke represents 80% of the total, and hemorrhagic stroke makes up the remainder. Stroke is the leading cause of adult disability in both North America and Medicare reimbursement for long-term adult care. The National Institutes of Health (NIH) estimate that stroke costs exceed $73 billion in US healthcare dollars per year.1 Improved treatments are needed to reduce the burden of human suffering and to lessen the financial burden on society. Circulation. 2011; 123: 2591-2601 doi: 10.1161. Copyright © 2011 American Heart Association, Inc. All rights reserved. Print ISSN: 0009-7322. Online ISSN: 1524-4539
Background and Purpose—Clazosentan, an endothelin receptor antagonist, has been shown to reduce vasospasm after aneurysmal subarachnoid hemorrhage (aSAH). CONSCIOUS-3 assessed whether clazosentan reduced vasospasm-related morbidity and all-cause mortality postaSAH secured by endovascular coiling. Stroke. 2012; 43: 1463-1469 Published online before print March 8, 2012. Copyright © 2012 American Heart Association, Inc. All rights reserved. Print ISSN: 0039-2499. Online ISSN: 1524-4628
BACKGROUND AND PURPOSE: A number of remodeling or protective techniques available to treat wide-neck intracranial aneurysms are increasingly being used, provided that the shape/type of aneurysm, vessel diameter, and inherent course of the vessel are conducive to their use. The purpose of this study was to describe a novel method using coil protection for treatment of wide-neck aneurysms. Published online before print June 14, 2012, doi: 10.3174/ajnr.A3157. Copyright © 2012 American Society of Neuroradiology
SUMMARY: As stroke is one of the leading causes of death and long-term morbidity worldwide, the research community has studied cardiac embolic sources, as well as vessel wall pathologies. For the latter, attention has been focused on defining morphologic tissue features associated with catastrophic events stemming from the carotid artery. Multiple noninvasive imaging modalities are currently being used to image and classify carotid atherosclerotic plaques, such as MR imaging, CT, and sonography, in an effort to provide clinically relevant predictive metrics for use in patient risk stratification and to define appropriate treatment options. This article compares and contrasts these existing clinical imaging modalities along with discussion of a new endovascular technique originally developed for cardiology, OCT, with which 3D comprehensive high-resolution images of the arterial wall can be acquired. Published online before print March 8, 2012, doi: 10.3174/ajnr.A2753. Copyright © 2012 American Society of Neuroradiology
Object: Endovascular therapy is the primary treatment option for carotid-cavernous fistulas (CCFs). Operative cannulation of the superior ophthalmic vein (SOV) provides a reasonable alternative route to the cavernous sinus when all transvenous and transarterial approaches have been unsuccessful. The role of the liquid embolic agent Onyx in the management of CCFs has not been well documented, especially when using an SOV approach. The purpose of this study is to assess the safety and efficacy of Onyx embolization of CCFs through a surgical cannulation of the SOV. Neurosurgical Focus. May 2012 / Vol. 32 / No. 5 / Page E13. DOI: 10.3171/2012.1.FOCUS123.
Endovascular embolization with Onyx has been increasingly used to treat intracranial and spinal dural arteriovenous fistulas (DAVFs). Several case series have been published in recent years reporting high DAVF cure rates with this technique. Although it is seldom reported, DAVF recurrence may occur despite initial “cure.” The authors present 3 separate cases of a recurrent DAVF after successful transarterial Onyx embolization. Despite adequate Onyx penetration into the fistula and draining vein, these cases demonstrate that DAVF recanalization may reappear with filling from previous or newly recruited arterial feeders. Other published reports of DAVF recurrence are examined, and potential contributory factors are discussed. These cases highlight the need for awareness of this possible phenomenon and suggest that follow-up angiography should be considered in patients treated with catheter embolization. Neurosurgical Focus. May 2012 / Vol. 32 / No. 5 / Page E12. DOI: 10.3171/2012.2.FOCUS1224.
Introduction: We aimed to evaluate the use of time-resolved whole-head CT angiography (4D-CTA) in patients with an untreated arteriovenous malformation of the brain (bAVM), as demonstrated by catheter angiography (DSA). Neuroradiology Volume 54, Number 2 (2012), 123-131, DOI: 10.1007/s00234-011-0864-0. Copyright The Author(s) 2011. This article is published with open access at Springerlink.com
Object: Multiple approaches have been used to treat carotid-cavernous fistulas (CCFs). The transvenous approach has become a popular and effective route. Onyx is a valuable tool in todays endovascular armamentarium. The authors describe the use of a balloon-assisted technique in the treatment of CCFs with Onyx and assess its feasibility, utility, and safety. Neurosurgical Focus. May 2012 / Vol. 32 / No. 5 / Page E14. DOI: 10.3171/2012.2.FOCUS1213.
Cerebral small vessel disease is an important cause of vascular cognitive impairment and dementia. On brain imaging, discrete lacunar infarcts and/or more diffuse regions of white matter hyperintensities or leucoaraiosis are seen. Magnetic resonance imaging plays a crucial role in diagnosis, and advanced magnetic resonance imaging techniques are providing new information on disease mechanisms and offering potential as surrogate disease markers. Longitudinal studies have demonstrated detectable progression of lesion load over short time periods, and weak correlations with cognition. Stronger correlations with cognition have been found with diffusion tensor imaging, which is more sensitive to white matter tract structure, supporting a role for disconnection in the pathogenesis of cognitive impairment. Brain volume also consistently correlates with cognition in asymptomatic small vessel disease, sporadic small vessel disease, and Cerebral Autosomal Dominant Arteriopathy with Subcortical Infarcts and Leukoencephalopathy. Gradient echo magnetic resonance imaging identifies microbleeds in a significant proportion of patients with small vessel disease, although their role in clinical management remains to be determined. Surrogate markers to monitor disease progression and evaluate new therapies would have major clinical use. The greater sensitivity of diffusion tensor imaging parameters and brain volume to change, and the stronger correlation of these parameters with cognition, suggest that they may be more powerful surrogates. However, data from longitudinal and intervention studies are required to determine if this is indeed the case. In this systematic review, we describe the use of both conventional and advanced magnetic resonance imaging techniques in patient groups with the full spectrum of clinical small vessel disease, from normal populations with WMH to patients groups with lacunar stroke and dementia. International Journal of StrokeVolume 6, Issue 1, Article first published online: 4 JAN 2011. Copyright © 2011 The Authors. International Journal of Stroke. Copyright © 2011 World Stroke Organization Vol 6, February 2011, 47–59
SUMMARY: IgG4-related disease is characterized by histologic fibrosis with IgG4-positive plasma cell infiltration. Our study evaluated MR imaging features of IgG4-related disease in the head and neck and brain. Images from 15 patients were retrospectively evaluated for the location, signal intensity, and enhancement patterns of lesions. Lacrimal gland enlargement was observed in 8 cases. Other lesions included orbital pseudotumor in 5, pituitary enlargement in 5, and cranial nerve enlargement in 7; the infraorbital nerve was involved in 4. All lesions were hypointense on T2-weighted images, which is typical for IgG4-related lesions. Multiple sites were involved in the head and neck and brain in 11 patients. The diagnosis of IgG4-related disease should be considered in a patient presenting with T2 hypointense lacrimal gland, pituitary, or cranial nerve enlargement, or a T2 hypointense orbital mass, especially if multiple sites in the head and neck are involved in the presence of elevated serum IgG4. Published online before print June 14, 2012, doi: 10.3174/ajnr.A3147. Copyright © 2012 American Society of Neuroradiology
Chronic cerebrospinal venous insufficiency (CCSVI) represents a recently described condition that may potentially contribute to the symptoms experienced by patients with multiple sclerosis. The evaluation of a prospective patient for CCSVI often involves an invasive evaluation with venography of the internal jugular and azygos veins. The purpose of this article is to review the normal anatomy of the internal jugular, vertebral, and azygos veins, as an understanding of these veins is necessary for appropriate interpretation of the venograms obtained to evaluate patients for CCSVI. Journal of Vascular and Interventional Radiology Volume 22, Issue 12 , Pages 1681-1690, December 2011. Copiryght © SIR, 2011
In 1969 Yaşargil first described direct extracranial-intracranial (EC-IC) bypass to increase cerebral perfusion.1 To assess the efficacy of this technique in preventing stroke in patients with athero-occlusive disease, a large multi-center randomized clinical trial was undertaken in 1985. No beneficial effect of surgical intervention was found when comparing the 1377 patients randomized to either surgical or medical therapy.2 Subgroup analysis failed to demonstrate a beneficial effect of surgery including the 808 patients with carotid artery occlusion. April 2012 - Volume 70 - Issue 4 - p N22–N23 doi: 10.1227/01.neu.0000413226.72843.1f. Copyright © by the Congress of Neurological Surgeons
BACKGROUND AND PURPOSE: Our aim was to compare 3D TOF-MRA sequences at 3T and 1.5T in the follow-up of coiled aneurysms. The follow-up of coiled intracranial aneurysms is mandatory to depict potential recanalization. 3D-TOF MRA is an appropriate tool for this purpose. Published online before print June 7, 2012, doi: 10.3174/ajnr.A3124. Copyright © 2012 American Society of Neuroradiology
Cookies Sociales
Son esos botones que permiten compartir el contenido del sitio web en sus redes sociales (Facebook, Twitter y Linkedin, previo tu consentimiento y login) a través de sistemas totalmente gestionados por dichas redes sociales, así como los recursos (pej. videos) y material que se encuentra en nuestra web, y que de igual manera se presta y gestiona completamente por un tercero.
Si no acepta estas cookies, no podrá compartir nuestro contenido a través de los botones, y en su caso, no podrás visualizar el contenido de terceros que hayamos incrustado en el sitio.
No las utilizamos