INFLUENCE OF ION-REFLEX PULSED MAGNETOELECTROPHORESIS EGB 761® ON THE BIOELECTRICAL ACTIVITY OF THE BRAIN OF PATIENTS WITH ISCHEMIC STROKE.

2018 ◽  
Author(s):  
Saule Turuspekova
Keyword(s):  
Ischemic Stroke ◽  
Bioelectrical Activity ◽  
Egb 761 ◽  
The Brain

Characterization of Ischemic Stroke in CT Images using Image Processing

2017 ◽  
Vol 7 (9) ◽  
pp. 18
Author(s):  
Amal Alzain ◽  
Suhaib Alameen ◽  
Rani Elmaki ◽  
Mohamed E. M. Gar-Elnabi
Keyword(s):  
Ischemic Stroke ◽  
White Matter ◽  
Classification Accuracy ◽  
Ct Images ◽  
Gray Level ◽  
Level Variation ◽  
Interactive Data ◽  
The Brain ◽  
Brain Tissues

This study concern to characterize the brain tissues to ischemic stroke, gray matter, white matter and CSF using texture analysisto extract classification features from CT images. The First Order Statistic techniques included sevenfeatures. To find the gray level variation in CT images it complements the FOS features extracted from CT images withgray level in pixels and estimate the variation of thesubpatterns. analyzing the image with Interactive Data Language IDL software to measure the grey level of images. The results show that the Gray Level variation and   features give classification accuracy of ischemic stroke 97.6%, gray matter95.2%, white matter 97.3% and the CSF classification accuracy 98.0%. The overall classification accuracy of brain tissues 97.0%.These relationships are stored in a Texture Dictionary that can be later used to automatically annotate new CT images with the appropriate brain tissues names.

scholarly journals Mesenchymal Stem Cell Derived Extracellular Vesicles for Repairing the Neurovascular Unit after Ischemic Stroke

Cells ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 767
Author(s):  
Courtney Davis ◽  
Sean I. Savitz ◽  
Nikunj Satani
Keyword(s):  
Ischemic Stroke ◽  
Extracellular Vesicles ◽  
Neurovascular Unit ◽  
Culture Conditions ◽  
Therapeutic Effects ◽  
Stroke Treatment ◽  
Inflammatory Molecules ◽  
The Brain

Ischemic stroke is a debilitating disease and one of the leading causes of long-term disability. During the early phase after ischemic stroke, the blood-brain barrier (BBB) exhibits increased permeability and disruption, leading to an influx of immune cells and inflammatory molecules that exacerbate the damage to the brain tissue. Mesenchymal stem cells have been investigated as a promising therapy to improve the recovery after ischemic stroke. The therapeutic effects imparted by MSCs are mostly paracrine. Recently, the role of extracellular vesicles released by these MSCs have been studied as possible carriers of information to the brain. This review focuses on the potential of MSC derived EVs to repair the components of the neurovascular unit (NVU) controlling the BBB, in order to promote overall recovery from stroke. Here, we review the techniques for increasing the effectiveness of MSC-based therapeutics, such as improved homing capabilities, bioengineering protein expression, modified culture conditions, and customizing the contents of EVs. Combining multiple techniques targeting NVU repair may provide the basis for improved future stroke treatment paradigms.

scholarly journals Pure Motor Stroke Secondary to Cerebral Infarction of Recurrent Artery of Heubner after Mild Head Trauma: A Case Report

2016 ◽  
Vol 4 (1) ◽  
pp. 139-141
Author(s):  
Ali Yilmaz ◽  
Zahir Kizilay ◽  
Ayca Ozkul ◽  
Bayram Çirak
Keyword(s):  
Ischemic Stroke ◽  
Head Trauma ◽  
Distal Part ◽  
Brain Mri ◽  
Artery Occlusion ◽  
Acute Ischemia ◽  
Post Traumatic ◽  
The Brain ◽  
Perforating Arteries ◽  
Pure Motor

BACKGROUND: The recurrent Heubner's artery is the distal part of the medial striate artery. Occlusion of the recurrent artery of Heubner, classically contralateral hemiparesis with fasciobrachiocrural predominance, is attributed to the occlusion of the recurrent artery of Heubner and is widely known as a stroke syndrome in adults. However, isolated occlusion of the deep perforating arteries following mild head trauma also occurs extremely rarely in childhood.CASE REPORT: Here we report the case of an 11-year-old boy with pure motor stroke. The brain MRI showed an acute ischemia in the recurrent artery of Heubner supply area following mild head trauma. His fasciobrachial hemiparesis and dysarthria were thought to be secondary to the stretching of deep perforating arteries leading to occlusion of the recurrent artery of Heubner.CONCLUSION: Post-traumatic pure motor ischemic stroke can be secondary to stretching of the deep perforating arteries especially in childhood.

scholarly journals Neighborhood Environment and Risk of Ischemic Stroke: The Brain Attack Surveillance in Corpus Christi (BASIC) Project

2006 ◽  
Vol 165 (3) ◽  
pp. 279-287 ◽  
Author(s):  
L. Lisabeth ◽  
A. Diez Roux ◽  
J. Escobar ◽  
M. Smith ◽  
L. Morgenstern
Keyword(s):  
Ischemic Stroke ◽  
Neighborhood Environment ◽  
Corpus Christi ◽  
The Brain

scholarly journals Three-dimensional cultured mesenchymal stem cells enhance repair of ischemic stroke through inhibition of microglia

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Yuejiao Li ◽  
Yankai Dong ◽  
Ye Ran ◽  
Yanan Zhang ◽  
Boyao Wu ◽  
...  
Keyword(s):  
Stem Cells ◽  
Mesenchymal Stem Cells ◽  
Ischemic Stroke ◽  
Proinflammatory Cytokines ◽  
Infarct Volume ◽  
Brain Lesion ◽  
Three Dimensional ◽  
Artery Occlusion ◽  
Rna Seq ◽  
The Brain

Abstract Background We show previously that three-dimensional (3D) spheroid cultured mesenchymal stem cells (MSCs) exhibit reduced cell size thus devoid of lung entrapment following intravenous (IV) infusion. In this study, we determined the therapeutic effect of 3D-cultured MSCs on ischemic stroke and investigated the mechanisms involved. Methods Rats underwent middle cerebral artery occlusion (MCAO) and reperfusion. 1 × 106 of 3D- or 2D-cultured MSCs, which were pre-labeled with GFP, were injected through the tail vain three and seven days after MCAO. Two days after infusion, MSC engraftment into the ischemic brain tissues was assessed by histological analysis for GFP-expressing cells, and infarct volume was determined by MRI. Microglia in the lesion were sorted and subjected to gene expressional analysis by RNA-seq. Results We found that infusion of 3D-cultured MSCs significantly reduced the infarct volume of the brain with increased engraftment of the cells into the ischemic tissue, compared to 2D-cultured MSCs. Accordingly, in the brain lesion of 3D MSC-treated animals, there were significantly reduced numbers of amoeboid microglia and decreased levels of proinflammatory cytokines, indicating attenuated activation of the microglia. RNA-seq of microglia derived from the lesions suggested that 3D-cultured MSCs decreased the response of microglia to the ischemic insult. Interestingly, we observed a decreased expression of mincle, a damage-associated molecular patterns (DAMPs) receptor, which induces the production of proinflammatory cytokines, suggestive of a potential mechanism in 3D MSC-mediated enhanced repair to ischemic stroke. Conclusions Our data indicate that 3D-cultured MSCs exhibit enhanced repair to ischemic stroke, probably through a suppression to ischemia-induced microglial activation.

SOME ASPECTS OF ACUTE CEREBROVASCULAR PATHOLOGY IN POSTPARTUM WOMEN

Vestnik ◽  
2021 ◽  
pp. 51-56
Author(s):  
Д.А. Митрохин ◽  
Ж.Б. Дюсембаева ◽  
М.М. Ибрагимов ◽  
А.А. Оспанов ◽  
А.Н. Сембинова ◽  
...  
Keyword(s):  
Ischemic Stroke ◽  
Postpartum Period ◽  
Cerebrovascular Accident ◽  
Hemorrhagic Stroke ◽  
Speech Disorders ◽  
Cerebral Stroke ◽  
Postpartum Women ◽  
Bioelectrical Activity ◽  
Acute Cerebrovascular Accident ◽  
Epileptiform Discharges

В данной статье, представлены результаты обследования 17 женщин, перенесших острое нарушение мозгового кровообращения в послеродовом периоде, с 2017 по 2021 годы, в возрасте от 19 до 39 лет. Показано, что у женщин в послеродовом периоде, перенесших острое нарушение мозгового кровообращения, выявлено преобладание ишемического инсульта над геморрагическим, что составило 64,7% и 35,3% соответственно. Неврологические признаки церебрального инсульта в послеродовом периоде характеризуются двигательными, речевыми расстройствами, нарушением чувствительности, а также часто психоэмоциональными проявлениями. Генерализованные тонико-клонические приступы чаще наблюдались у пациенток с геморрагическим инсультом (33,3%), в сравнении с ишемическим инсультом (9,1%). У женщин в послеродовом периоде, перенесших острое нарушение мозгового кровообращения, наиболее значимыми факторами риска являются: наличие хронических заболеваний, в том числе отягощенный акушерско-гинекологический анамнез, прием пероральных контрацептивов, а также курение. Биоэлектрическая активность головного мозга характеризовалась выраженной дельта и тета активностью, эпилептиформными разрядами в виде острых волн, спайков и комплексов «пик-волна», с преобладанием у пациенток с геморрагическим инсультом. Более значительное повышение индекса когерентности в дельта и тета диапазонах у пациентов, перенесших геморрагический инсульт, может указывать на более грубые межполушарные нарушения, в сравнении с ишемическим инсультом. Отмечено повышение интегрального индекса диапазона медленно-волновой активности и преобладание процентного отношения спектральных мощностей медленных волн (дельта, тета) к быстрым волнам (альфа, бета), особенно выраженное у больных с геморрагическим инсультом (р < 0,05), в сравнении с ишемическим инсультом. Наиболее тяжелое течение послеродового периода наблюдалось у пациенток с геморрагическим инсультом, именно в этом случае было 2 летальных исхода. This article presents the results of a survey of 17 women with acute cerebrovascular accident in the postpartum period, from 2017 to 2021, aged 19 to 39 years. It is shown that the period in women in the postpartum period, who underwent acute cerebrovascular accident, revealed the prevalence of ischemic stroke over hemorrhagic, which amounted to 64,7% and 35,3%, respectively. Neurological signs of cerebral stroke in the postpartum period are characterized by movement, speech disorders, impaired sensitivity, and often psychoemotional manifestations. Generalized tonic-clonic seizures were more often observed in patients with hemorrhagic stroke (33,3%) in comparison with ischemic stroke (9,1%). In postpartum women who have suffered acute cerebrovascular accident, the most significant risk factors are: the presence of chronic diseases, including a burdened obstetric and gynecological history, taking oral contraceptives, as well as smoking. The bioelectrical activity of the brain was characterized by pronounced delta and theta activity, epileptiform discharges in the form of sharp waves, spikes and peak-wave complexes, with a predominance in patients with hemorrhagic stroke. A more significant increase in the coherence index in the delta and theta ranges in patients after hemorrhagic stroke may indicate more severe interhemispheric disorders in comparison with ischemic stroke. An increase in the integral index of the range of slow-wave activity and a predominance of the percentage of the spectral powers of slow waves (delta, theta) to fast waves (alpha, beta), especially pronounced in patients with hemorrhagic stroke (p <0,05), in comparison with ischemic stroke. The most severe postpartum period was observed in patients with hemorrhagic stroke, in this case there were 2 deaths.

Abstract MP16: Excessive White Matter Hyperintensity Burden and Functional Outcomes After Acute Ischemic Stroke

Stroke ◽  
2021 ◽  
Vol 52 (Suppl_1) ◽  
Author(s):  
Sungmin Hong ◽  
Anne-katrin Giese ◽  
Markus D Schirmer ◽  
Adrian V Dalca ◽  
Anna Bonkhoff ◽  
...  
Keyword(s):  
Ischemic Stroke ◽  
White Matter ◽  
Acute Ischemic Stroke ◽  
Functional Outcomes ◽  
Life Time ◽  
Stroke Recovery ◽  
White Matter Hyperintensity ◽  
Brain Health ◽  
Stroke Outcomes ◽  
The Brain

Objective: Ability of the brain to recover after an acute ischemic stroke (AIS) is linked to the pre-stroke burden of white matter hyperintensity (WMH), a radiographic marker of brain health. We sought to determine the excessive WMH burden in an AIS population and investigate its association with 3-month stroke outcomes. Data: We used 2,435 subjects from the MRI-GENIE study. Three-month functional outcomes of 872 subjects among those subjects were measured by 90-day modified Ranking Scale (mRS). Methods: We automatically quantified WMH volume (WMHv) on FLAIR images and adjusted for a brain volume. We modeled a trend using the factor analysis (FA) log-linear regression using age, sex, atrial fibrillation, diabetes, hypertension, coronary artery disease and smoking as input variables. We categorized three WMH burden groups based on the conditional probability given by the model (LOW: lower 33%, MED: middle 34%, and HIGH: upper 33%). The subgroups were compared with respect to mRS (median and dichotomized odds ratio (OR) (good/poor: mRS 0-2/3-6)). Results: Five FA components out of seven with significant relationship to WMHv (p<0.001) were used for the regression modeling (R 2 =0.359). The HIGH group showed higher median (median=2, IQR=2) mRS score than LOW (median=1, IQR=1) and MED (median=1, IQR=1). The odds (OR) of good AIS outcome for LOW and MED were 1.8 (p=0.0001) and 1.6 (p=0.006) times higher than HIGH, respectively. Conclusion: Once accounted for clinical covariates, the excessive WMHv was associated with worse 3-month stroke outcomes. These data suggest that a life-time of injury to the white matter reflected in WMH is an important factor for stroke recovery and an indicator of the brain health.

Sign in / Sign up

Export Citation Format

Share Document