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Procedure: Perfusion

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Total 2334 results found since Jan 2013.

Postural asymmetry correlated with lateralization of cerebellar perfusion in persons with chronic stroke: A role of crossed cerebellar diaschisis in left side.
CONCLUSIONS: This study indicates that the impairment of posture sway control was more severe in left CCD than the other CCD types. The results support a relationship between the postural asymmetry and lateralization of CCD in patients with chronic stroke. PMID: 27830942 [PubMed - as supplied by publisher]
Source: Brain Injury - November 12, 2016 Category: Neurology Tags: Brain Inj Source Type: research

Prolonged perfusion predicts recurrent ischemic stroke but not transient ischemic attack in patients with symptomatic intracranial stenosis.
Abstract BACKGROUND: Intracranial arterial stenosis (ICAS) is the dominant cause for ischemic stroke worldwide, with hemodynamic compromise as a crucial contributor. Prolonged perfusion is commonly observed in ICAS patients on CT perfusion (CTP) maps, while the clinical significance of this perfusion pattern has not been elucidated. METHODS: Patients having symptomatic ICAS of 50-99% stenosis with sustained downstream cerebral blood flow (CBF) were enrolled into this study. Prolonged perfusion was defined as increased mean transit time (MTT) in vascular territories of the target ICAS on CTP maps. The primary ...
Source: Current Neurovascular Research - April 13, 2017 Category: Neurology Authors: Lan L, Leng X, Ip V, Leung T, Soo Y, Abrigo J, Wong KS Tags: Curr Neurovasc Res Source Type: research

Cerebral blood flow and auto-regulation in acute TIA patients from a general hospital in Qatar (P4.253)
Conclusions:Preliminary results indicate the feasibility of TCD and BHI in acute evaluation of TIA patients for purpose of prognosis and functional outcome. Further studies are necessary to confirm their clinical value.Study Supported by: This research was supported by QNRF (a member of Qatar foundation) and NPRP No. 6-565-3-141. The opinions expressed are the sole responsibility of the authors.Disclosure: Dr. Musthak has nothing to disclose. Dr. Dimassi has nothing to disclose. Dr. Akhtar has nothing to disclose. Dr. Kamran has nothing to disclose. Dr. Abbasi has nothing to disclose. Dr. Khattab has nothing to disclose. D...
Source: Neurology - April 17, 2017 Category: Neurology Authors: Musthak, A., Dimassi, D., Akhtar, N., Kamran, S., Abbasi, S., Khattab, A., El Sotouhy, A., Haddad, N., Streletz, L. Tags: Acute and Diagnostic Imaging in Ischemic Stroke and TIA Source Type: research

Acute Stroke differential diagnosis: stroke mimics
Publication date: Available online 5 May 2017 Source:European Journal of Radiology Author(s): Pedro Vilela Stroke mimics (SM) are non-vascular conditions that present with an acute neurological deficit simulating acute ischemic stroke and represent a significant percentage of all acute stroke hospital admissions. The most common clinical SM includes conversion/functional (psychiatric disorder); seizures and postictal paralysis; toxic-metabolic disturbances; brain tumours; infections, and migraine. Imaging is essential for SM recognition, being Diffusion weighted imaging (DWI), perfusion imaging and angiographic studies ve...
Source: European Journal of Radiology - May 6, 2017 Category: Radiology Source Type: research

Reliability, Reproducibility and Prognostic Accuracy of the Alberta Stroke Program Early CT Score on CT Perfusion and Non-Contrast CT in Hyperacute Stroke
Background: Alberta Stroke Program Early CT Score (ASPECTS) assesses early ischemic change on non-contrast CT (NCCT). We hypothesised that assessing ASPECTS regions on CT Perfusion (CTP) rather than NCCT would improve inter-rater agreement and prognostic accuracy, particularly in patients presenting early after stroke onset.Methods: Ischemic stroke patients treated with intravenous alteplase from 2009 to 2014 at our institution were included in this study. Inter-rater agreement and prognostic accuracy of ASPECTS across modalities were analysed by the time between stroke onset and initial NCCT, dichotomized 1st quartile ver...
Source: Cerebrovascular Diseases - August 15, 2017 Category: Neurology Source Type: research

Changes in Structure and Perfusion of Gray Matter Tissues during Recovery from Ischemic Subcortical Stroke: A Longitudinal MRI Study
This article is protected by copyright. All rights reserved.
Source: European Journal of Neuroscience - August 1, 2017 Category: Neuroscience Authors: Xinfeng Yu, Linglin Yang, Ruirui Song, Yerfan Jiaerken, Jun Yang, Min Lou, Quan Jiang, Minming Zhang Tags: Research Report Source Type: research

Leukoaraiosis as an outcome predictor in the acute and subacute phases of stroke.
Authors: Fierini F, Poggesi A, Pantoni L Abstract INTRODUCTION: Leukoaraiosis (LA) is one of the neuroimaging features of cerebral small vessel disease and is associated with poor long-term prognosis. Areas covered: This narrative review focuses on the predictive role of LA on the evolution of the ischemic brain damage and on the clinical outcome in the subacute phase of stroke and in the short-term period afterwards. Expert commentary: In acute stroke, LA is associated with a less favorable fate of brain infarct and is a marker of increased risk of thrombolysis-related hemorrhagic transformation. The impaired cerebra...
Source: Expert Review of Neurotherapeutics - August 23, 2017 Category: Neurology Tags: Expert Rev Neurother Source Type: research

Increased arterial stiffness is associated with poor collaterals in acute ischemic stroke from large vessel occlusion.
CONCLUSIONS: Our results suggest that, in patients with ischemic stroke from LAA, arterial stiffness may contribute to the impairment of collateral circulation and, therefore, it could reduce the beneficial effects of acute treatments. PMID: 29577862 [PubMed - as supplied by publisher]
Source: Current Neurovascular Research - March 25, 2018 Category: Neurology Authors: Acampa M, Romano DG, Lazzerini PE, Leonini S, Guideri F, Tassi R, Casseri T, Bracco S, Martini G Tags: Curr Neurovasc Res Source Type: research

Cerebral venous collaterals: A new fort for fighting ischemic stroke?
Publication date: April–May 2018Source: Progress in Neurobiology, Volumes 163–164Author(s): Lu-sha Tong, Zhen-ni Guo, Yi-bo Ou, Yan-nan Yu, Xiao-cheng Zhang, Jiping Tang, John H. Zhang, Min LouAbstractStroke therapy has entered a new era highlighted by the use of endovascular therapy in addition to intravenous thrombolysis. However, the efficacy of current therapeutic regimens might be reduced by their associated adverse events. For example, over-reperfusion and futile recanalization may lead to large infarct, brain swelling, hemorrhagic complication and neurological deterioration. The traditional pathophysiological un...
Source: Progress in Neurobiology - July 5, 2018 Category: Neuroscience Source Type: research

Study reveals steep cost of delaying stroke treatment
Researchers from Canada have found that delaying treatment for stroke patients...Read more on AuntMinnie.comRelated Reading: 3 CTA signs show which stroke patients can skip surgery Perfusion imaging expands window for stroke treatment Infervision debuts AI stroke screening software CTA helps direct use of clot removal for stroke patients Color mapping boosts vessel interpretation in stroke CT
Source: AuntMinnie.com Headlines - October 18, 2018 Category: Radiology Source Type: news

Evaluation of retinal injury in a rat model of transient ischemic stroke.
This study was designed to evaluate in vivo retinal injury induced by transient global cerebral ischemia/reperfusion (I/R). A stroke-induced retinal injury model in Wistar rats was established by electrocoagulation of bilateral vertebral arteries, combined with transient ligation of the bilateral common carotid arteries. Rats were randomly divided into groups based on the time post cerebral perfusion (3 h, 24 h, 48 h, 72 h, and 7 days). Retinal injury was evaluated by histological analysis, examination of eye fundus, and TUNEL staining. The expression of protein kinase C-alpha (PKCα) and fibrillary acidic protein (GFAP) w...
Source: Histology and Histopathology - November 11, 2018 Category: Cytology Tags: Histol Histopathol Source Type: research

Early MRI-negative posterior circulation stroke presenting as acute dizziness
AbstractThe aim of this study was to determine the frequency, clinical and radiological features, and efficacy of clinical evaluation and perfusion-weighted imaging (PWI) for the prediction of final stroke in patients with DWI/MRI-negative posterior circulation stroke (PCS) presenting acute dizziness/vertigo. From our comprehensive prospective stroke registry of acute ischemic stroke during a 7-year period, we identified 1846 consecutive patients with PCS, 850 of whom presented with acute dizziness/vertigo. Of these 850 patients, initial DWI-MRI was negative in 35 (4.1%). In these 35 patients, dizziness/vertigo was acute p...
Source: Journal of Neurology - November 14, 2018 Category: Neurology Source Type: research

Seizure in code stroke: Stroke mimic and initial manifestation of stroke
The objective of this study was to analyze the frequency, characteristics and results of neuroimaging including CT perfusion in patients with seizures manifesting initially as stroke-like symptoms.
Source: The American Journal of Emergency Medicine - December 27, 2018 Category: Emergency Medicine Authors: Soo Jeong Kim, Dong Wook Kim, Hahn Young Kim, Hong Gee Roh, Jeong-Jin Park Source Type: research

CT matches MRI for late-window stroke evaluation
Stroke patients who underwent endovascular therapy had similar improvement...Read more on AuntMinnie.comRelated Reading: Machine learning can predict stroke treatment outcomes Study reveals steep cost of delaying stroke treatment 3 CTA signs show which stroke patients can skip surgery Perfusion imaging expands window for stroke treatment CTA helps direct use of clot removal for stroke patients
Source: AuntMinnie.com Headlines - February 6, 2019 Category: Radiology Source Type: news