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ESTUDIOS


20 marzo 2014

BMJ OPEN. Acute ischaemic stroke outcomes following mechanical thrombectomy in the elderly versus their younger counterpart: a retrospective cohort study

Mark R Villwock, Amit Singla, David J Padalino, Eric M Deshaies

Objectives: Many physicians debate the efficacy of mechanical thrombectomy for ischaemic stroke, but most agree that to establish potential benefit, patient selection must be examined further. People >80 years are a growing population of patients with ischaemic stroke but are largely excluded from clinical trials. The benefit of thrombectomy for them may be greatly reduced due to diminishing neuroplasticity and a larger number of medical comorbidities. To address this knowledge gap, we examined clinical and economic outcomes after mechanical thrombectomy in the ischaemic stroke population from the Nationwide Inpatient Sample. Our null hypotheses were that elderly patients (>80 years) would have a similar rate of inpatient mortality in comparison to their younger counterparts and incur a similar economic expense.

19 marzo 2013

JOURNAL OF NEUROINTERVENTIONAL SURGERY. Ischemic stroke. Original research. Angioplasty and stenting of intracranial atherosclerosis with the Wingspan system: 1-year clinical and radiological outcome in a single Asian center

Simon Chun Ho Yu1, Thomas Wai Hong Leung2, Kwok Tung Lee1, Lawrence Ka Sing Wong2

Background: This study aimed to evaluate the 1-year clinical and angiographic outcome of angioplasty and stenting of intracranial atherosclerosis using Wingspan and Gateway system

12 diciembre 2013

AMERICAN JOURNAL OF NEURORADIOLOGY. DWI Reversal Is Associated with Small Infarct Volume in Patients with TIA and Minor Stroke

N. Asdaghi, B.C.V. Campbell, K.S. Butcher, J.I. Coulter, J. Modi, A. Qazi, M. Goyal, A.M. Demchuk, and S.B. Coutts

Background and Purpose: More than half of patients with TIA/minor stroke have ischemic lesions on early DWI, which represent irreversibly damaged tissue. The presence and volume of DWI lesions predict early deterioration in this population. We aimed to study the rate and implications of DWI reversal in patients with TIA/minor stroke

01 noviembre 2013

AMERICAN JOURNAL OF NEURORADIOLOGY. Stent-Assisted Coiling versus Coiling Alone in Unruptured Intracranial Aneurysms in the Matrix and Platinum Science Trial: Safety, Efficacy, and Mid-Term Outcomes

S.W. Hetts, A. Turk, J.D. English, C.F. Dowd, J. Mocco, C. Prestigiacomo, G. Nesbit, S.G. Ge, J.N. Jin, K. Carroll, Y. Murayama, A. Gholkar, S. Barnwell, D. Lopes, S.C. Johnston, and C. McDougall, on behalf of the Matrix and Platinum Science Trial Investigators

Background and Purpose: Stent-assisted coiling may result in less aneurysm recanalization but more complications than coiling alone. We evaluated outcomes of coiling with and without stents in the multicenter Matrix and Platinum Science Trial.

14 noviembre 2013

AMERICAN JOURNAL OF NEURORADIOLOGY. Validation and Initial Application of a Semiautomatic Aneurysm Measurement Software: A Tool for Assessing Volumetric Packing Attenuation

H. Takao, T. Ishibashi, T. Saguchi, H. Arakawa, M. Ebara, K. Irie, and Y. Murayama

Background and Purpose: Precise aneurysm measurements and volume embolization ratios are essential for long-term durability of endovascular coil embolization. We evaluated the accuracy of newly developed semiautomatic cerebral aneurysm measurement software, NeuroVision, and explored the value of volume embolization ratio in the prediction of re-treatment.

14 marzo 2014

AMERICAN JOURNAL OF NEURORADIOLOGY. Resolution of Mass Effect and Compression Symptoms following Endoluminal Flow Diversion for the Treatment of Intracranial Aneurysms

I. Szikora, M. Marosfo´´i, B. Salomva´ry, Z. Berentei, and I. Gubucz

Background and Purpose: Alleviation of aneurysm induced mass effect has been difficult with both conventional endovascular and surgical techniques. Our aim was to study the efficacy of endovascular flow modification on aneurysm-induced mass effect and compression syndrome, as demonstrated by cross-sectional imaging studies and clinical follow-up.

29 noviembre 2012

AMERICAN JOURNAL OF NEURORADIOLOGY. Sex Differences of High-Risk Carotid Atherosclerotic Plaque with Less Than 50% Stenosis in Asymptomatic Patients: An In Vivo 3T MRI Study

H. Ota, M.J. Reeves, D.C. Zhu, A. Majid, A. Collar, C. Yuan, and J.K. DeMarco

Background and Purpose: Men have a greater prevalence of high-risk carotid plaque features associated with stroke compared with women who have 50% stenosis, but little is known about these features in less significantly stenotic carotid arteries. This study aims to evaluate sex differences in complicated carotid plaque features in asymptomatic patients with 50% stenosis.

19 enero 2012

AMERICAN JOURNAL OF NEURORADIOLOGY. Quantitative Assessment of Chronic Thalamic Stroke

G. Pergola, B. Suchan, B. Koch, M. Schwarz, I. Daum, and O. Güntürkün

Summary: The procedure presented quantitatively assesses thalamic lesions in the chronic phase of an ischemic episode. The structural MR images of 19 patients with ischemia in the thalamus were assessed by radiologic inspection. An independent rater allocated the damage to the thalamic nuclei. The assessments showed 89% accordance with the radiologic inspection (P.001). This procedure ranks the extent of the damage to thalamic nuclei and accounts for postacute rearrangement of the neural tissue

01 abril 2014

THE LANCET NEUROLOGY. Acute post-stroke blood pressure relative to premorbid levels in intracerebral haemorrhage versus major ischaemic stroke: a population-based study

Urs Fischer MD a †, Marie Therese Cooney PhD a †, Linda M Bull RN a, Louise E Silver DPhil a, Prof John Chalmers MD b, Prof Craig S Anderson MD b, Ziyah Mehta DPhil a, Prof Peter M Rothwell FMedSci a

Background: It is often assumed that blood pressure increases acutely after major stroke, resulting in so-called post-stroke hypertension. In view of evidence that the risks and benefits of blood pressure-lowering treatment in acute stroke might differ between patients with major ischaemic stroke and those with primary intracerebral haemorrhage, we compared acute-phase and premorbid blood pressure levels in these two disorders.

03 abril 2014

AMERICAN JOURNAL OF NEURORADIOLOGY. Comparison of Perfusion, Diffusion, and MR Spectroscopy between Low-Grade Enhancing Pilocytic Astrocytomas and High-Grade Astrocytomas

M. de Fatima Vasco Aragao, M. Law, D. Batista de Almeida, G. Fatterpekar, B. Delman, A.S. Bader, M. Pelaez, M. Fowkes, R. Vieira de Mello, and M. Moraes Valenca

Background and Purpose: The differentiation of pilocytic astrocytomas and high-grade astrocytomas is sometimes difficult. There are limited comparisons in the literature of the advanced MR imaging findings of pilocytic astrocytomas versus high-grade astrocytomas. The purpose of this study was to assess the MR imaging, PWI, DWI, and MR spectroscopy characteristics of pilocytic astrocytomas compared with high-grade astrocytomas.

20 febrero 2014

AMERICAN JOURNAL OF NEURORADIOLOGY. Repeated Head CT in the Neurosurgical Intensive Care Unit: Feasibility of Sinogram-Affirmed Iterative Reconstruction– Based Ultra-Low-Dose CT for Surveillance

I. Corcuera-Solano, A.H. Doshi, A. Noor, and L.N. Tanenbaum

Background and Purpose: Patients in the neurosurgical intensive care unit undergo multiple head CT scans, resulting in high cumulative radiation exposures. Our aim was to assess the acceptability of a dedicated, special-purpose sinogram-affirmed iterative reconstruction– based ultra-low-dose CT protocol for neurosurgical intensive care unit surveillance head CT examinations, comparing image quality with studies performed with our standard-of-care sinogram-affirmed iterative reconstruction low-dose CT and legacy filtered back-projection standard-dose CT protocols.

13 marzo 2014

AMERICAN JOURNAL OF NEURORADIOLOGY. Influence of Patient Age on Angioarchitecture of Brain Arteriovenous Malformations

S.W. Hetts, D.L. Cooke, J. Nelson, N. Gupta, H. Fullerton, M.R. Amans, J.A. Narvid, P. Moftakhar, H. McSwain, C.F. Dowd, R.T. Higashida, V.V. Halbach, M.T. Lawton, and H. Kim

Background and Purpose: The imaging characteristics and modes of presentation of brain AVMs may vary with patient age. Our aim was to determine whether clinical and angioarchitectural features of brain AVMs differ between children and adults.

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