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Total 25 results found since Jan 2013.

Arterial Spin Labeling Perfusion Magnetic Resonance Imaging Performed in Acute Perinatal Stroke Reveals Hyperperfusion Associated With Ischemic Injury Clinical Sciences
Conclusions— Perfusion-weighted imaging can be obtained in neonates with acute stroke and often reveals hyperperfusion in the infarct core. Penumbra in arterial ischemic stroke is seldom found. Hyperperfusion may be caused by poststroke reperfusion or to neuronal hyperexcitability of stroke-associated seizure. Its identification may be useful for consideration of therapy for acute neonatal stroke.
Source: Stroke - May 22, 2016 Category: Neurology Authors: Watson, C. G., Dehaes, M., Gagoski, B. A., Grant, P. E., Rivkin, M. J. Tags: Pediatrics, Magnetic Resonance Imaging (MRI), Cerebrovascular Disease/Stroke, Ischemic Stroke Clinical Sciences Source Type: research

Optical Bedside Monitoring of Cerebral Blood Flow in Acute Ischemic Stroke Patients during Head of Bed Manipulation (P4.216)
CONCLUSIONS: A lower HOB angle results in an increase in cortical CBF without a significant change in arterial flow velocity in the setting of acute stroke, but there is variability across patients in this response. Bedside CBF monitoring with DCS provides a potential means to individualize interventions designed to optimize CBF in acute ischemic stroke.Disclosure: Dr. Favilla has nothing to disclose. Dr. Mesquita has nothing to disclose. Dr. Mullen has nothing to disclose. Dr. Durduran has nothing to disclose. Dr. Kim has nothing to disclose. Dr. Minkoff has nothing to disclose. Dr. Kasner has received personal compensati...
Source: Neurology - April 9, 2014 Category: Neurology Authors: Favilla, C., Mesquita, R., Mullen, M., Durduran, T., Kim, M., Minkoff, D., Kasner, S., Joel, G., Yodh, A., Detre, J. Tags: Cerebrovascular Disease and Interventional Neurology: Acute Stroke Endovascular Source Type: research

Intravenous Thrombolysis in Posterior Circulation Stroke
Conclusions: Up to date, no data about PCIS and IVT are available from RTCs. Based on limited results from retrospective clinical studies and case series, IVT is safer for use in PCIS than in ACIS. Patients with brainstem ischemia, vertebral artery occlusion, and absence of basilar or posterior cerebral artery occlusion could be considered for treatment with IVT even in borderline cases. Time to IVT in PCIS seems to be a less crucial factor than in ACIS. IVT for PCIS may be beneficial even after 4.5 h from symptom onset. Introduction History of Intravenous Thrombolysis—The Most Relevant Studies Intravenous...
Source: Frontiers in Neurology - April 25, 2019 Category: Neurology Source Type: research

Postreperfusion Blood Pressure Variability After Endovascular Thrombectomy Affects Outcomes in Acute Ischemic Stroke Patients With Poor Collateral Circulation
Conclusion: Postreperfusion BP management by decreasing BPV may have influence on improving clinical outcome in cases of poor collateral circulation among patients achieving successful recanalization after ERT. Introduction Endovascular recanalization therapy (ERT) has been adopted as standard stroke care in patients with acute ischemic stroke (1–6). Time to recanalization and degree of recanalization are the most important predictors of clinical outcomes after ERT (7). Before recanalization, an effort to reduce the time from symptom onset to reperfusion is critical for penumbral salvage. After recanalization...
Source: Frontiers in Neurology - April 11, 2019 Category: Neurology Source Type: research

Influence of Sex on Stroke Prognosis: A Demographic, Clinical, and Molecular Analysis
Conclusion Our data suggest that women who suffer from IS present with a poorer functional outcome than men at 3-months, regardless of other preclinical and clinical factors during the acute phase. These relationships seem to be mediated by atrial dysfunction and inflammation. The inflammatory response is slightly higher in women; however, there are no sex differences in their functional behavior. There is a probable relationship between the molecular marker of atrial dysfunction NT-proBNP and worse functional outcome in women, and the connection seems to be more important in cardioembolic stroke patients. In patients wi...
Source: Frontiers in Neurology - April 16, 2019 Category: Neurology Source Type: research

Detection of Presymptomatically Latent Lesions Developing into Stroke-Like Episodes by Arterial Spin-Labeling Perfusion MRI in MELAS Patients (P03.162)
CONCLUSIONS: These findings suggest that regional ASL hyperperfusion in the presymptomatic phase precedes the appearance of upcoming stroke-like lesions, and that presymptomatic SEs had already occurred several months before the onset of clinical symptoms. ASL imaging has great potential for detecting presymptomatic stroke-like lesions and predicting the emergence of SEs.Supported by: In part by Grants-in-Aid for the Scientific Research on Innovative Areas from the Ministry of Education, Culture, Sports, Science and Technology of Japan and Young Scientists (B) from the Japan Society for the Promotion of Science, and the Re...
Source: Neurology - February 14, 2013 Category: Neurology Authors: Ikawa, M., Kimura, H., Muramatsu, T., Matsunaga, A., Tsujikawa, T., Yamamoto, T., Kosaka, N., Kinoshita, K., Yamamura, O., Hamano, T., Nakamoto, Y., Yoneda, M. Tags: P03 Cerebrovascular Disease III Source Type: research

O16/158 Artificial Intelligence based nationwide centralised decision supporting system for improving stroke case efficiency in Hungary
ConclusionUsing AI based centralized stroke imaging network fast and reliable decision support can be provided to a large nationwide stroke care system. The system was installed with the support of an EU grant EFOP 5.2.6.Disclosure of InterestIstvan Szikora has a consulting agreement with Brainomix Ltd.Zoltan Chadaide is a former employee of Brainomix Ltd.Edvard Benes is owner and CEO of eRAD-BBThe system was built by the support of an EU grant EFOP 5.2.6.The other authors have no relevant conflict of interest.
Source: Journal of NeuroInterventional Surgery - August 21, 2023 Category: Neurosurgery Authors: Szikora, I., Magyar, B., Papai, G., Szudi, G., Kondor, M., Czencz, M., Nardai, S., Chadaide, Z., Benes, E., Ovary, C., Eross, L. Tags: 2.2 ISCHEMIC - Imaging Source Type: research

O19 Late-window aspiration thrombectomy for anterior Acute Ischemic Stroke: subset analysis for COMPLETE Study
ConclusionsLate-window aspiration thrombectomy with Penumbra System is safe and effective for patients with anterior circulation stroke. Our study reports rates of good functional outcome that compare favorably to the DAWN and DEFUSE-3 medical management arms.ReferencesNogueira Rg et al. Dawn Trial Investigators. Thrombectomy 6 to 24 Hours after Stroke with a Mismatch between Deficit and Infarct. N Engl J Med. 2018 Jan 4;378(1):11–21. DOI: 10.1056/NEJMOA1706442. EPUB 2017 Nov 11. PMID: 29129157.Albers GW et al. Defuse 3 Investigators. Thrombectomy for Stroke at 6 To 16 Hours with Selection by Perfusion Imaging. N Eng...
Source: Journal of NeuroInterventional Surgery - August 29, 2022 Category: Neurosurgery Authors: Hassan, A., Fifi, J., Zaidat, O. Tags: 14th Congress of the European Society of Minimally Invasive Neurological Therapy 2022 Meeting Abstracts Source Type: research

Computed Tomography Perfusion Imaging in the Selection of Acute Stroke Patients to Undergo Emergent Carotid Endarterectomy
Severe acute stroke patients with critical carotid stenosis or occlusion without intracranial thrombus typically do not undergo emergent carotid thromboendarterectomy (CEA) because of the risk of reperfusion-related intracranial hemorrhage. Past studies have not consistently demonstrated benefit of early operative intervention. Cerebral computed tomography (CT), cervical and cerebral CT angiography (CTA), and cerebral CT perfusion (CTP) imaging may identify a subset of acute stroke patients without intracranial thrombus who may benefit from emergent CEA.
Source: Annals of Vascular Surgery - September 3, 2014 Category: Surgery Authors: Thomas G. Devlin, Sachin V. Phade, Rodney K. Hutson, Mark W. Fugate, Grant R. Major, Gregory W. Albers, Abdelazim A. Sirelkhatim, Biggya L. Sapkota, Steven D. Quartfordt, Blaise W. Baxter Tags: Case Report Source Type: research

Cerebral White Matter Hypoperfusion Increases with Small-Vessel Disease Burden. Data From the Third International Stroke Trial
Leukoaraiosis is associated with impaired cerebral perfusion, but the effect of individual and combined small-vessel disease (SVD) features on white matter perfusion is unclear.
Source: Journal of Stroke and Cerebrovascular Diseases - March 14, 2017 Category: Neurology Authors: Francesco Arba, Grant Mair, Trevor Carpenter, Eleni Sakka, Peter A.G. Sandercock, Richard I. Lindley, Domenico Inzitari, Joanna M. Wardlaw, IST-3 Trial Collaborators Source Type: research

P47 Optimal parameter for predicting final Infarct volume and outcome after complete recanalization of medium vessel stroke
ConclusionTMax>10sec volumeon baseline CTP predicts final-infarct-volume and progression as-well-as clinical outcome after MT recanalization for AIS with DMVO.ReferencesGuenego A, Mine B, Bonnet T, et al. Thrombectomy for distal medium vessel occlusion with a new generation of stentretriever (tigertriever 13). Interv Neuroradiol 2021: 15910199211039926. 2021/09/14.DOI: 10.1177/15910199211039926. Do you have any conflict of interest to declare?: YesConflict of Interest StatementConsultancy for Rapid Medical (travel grant only)
Source: Journal of NeuroInterventional Surgery - August 29, 2022 Category: Neurosurgery Authors: Guenego, A., Lubicz, B. Tags: 14th Congress of the European Society of Minimally Invasive Neurological Therapy 2022 Meeting Abstracts Source Type: research

Potential Applications of Remote Limb Ischemic Conditioning for Chronic Cerebral Circulation Insufficiency
Conclusion Due to its long-term and often invisible course, CCCI has received less attention than acute cerebral ischemic stroke. However, without appropriate intervention, CCCI may lead to a variety of adverse events. Because the pathophysiological changes associated with CCCI are complex, pharmacological research in this area has been disappointing. Recent research suggests that RLIC, which is less invasive and more well-tolerated than drug treatment, can activate endogenous protective mechanisms during CCCI. In the present report, we reviewed studies related to CCCI (Table 1), as well as those related to stroke and sta...
Source: Frontiers in Neurology - May 2, 2019 Category: Neurology Source Type: research

Characterizing the Penumbras of White Matter Hyperintensities and Their Associations With Cognitive Function in Patients With Subcortical Vascular Mild Cognitive Impairment
Conclusion In this study, reduced CBF and FA and increased MD in the inner NAWM layers for both PVWMH and DWMH suggested extensive WM alterations beyond the visible WM lesions commonly observed on clinical MRI of svMCI subjects. CBF penumbras cover more extensive WM at risk than DTI penumbras, suggesting the likelihood that compromised CBF precedes white matter integrity changes, and CBF penumbras may be a potential target for the prevention of further microstructural white matter damage. The imaging parameters investigated, however, did not correlate to cognition. Author Contributions YZ, QX, and XG conceived and desig...
Source: Frontiers in Neurology - April 11, 2019 Category: Neurology Source Type: research

Functional MRI of Letter Cancellation Task Performance in Older Adults
Conclusion The present work is the first to identify neural correlates of the LCT using fMRI and tablet technology in a healthy aging population. Across all ages, the activation was found to be bilateral, including in the cerebellum, superior temporal lobe, precentral gyrus, frontal gyrus, and various occipital and parietal areas. With increasing age, performance generally decreased and brain activity was reduced in the supplementary motor area, middle and inferior frontal gyrus, middle occipital gyrus, putamen and cerebellum. Better LCT performance was correlated with increased activity in the middle frontal gyrus, and r...
Source: Frontiers in Human Neuroscience - April 15, 2019 Category: Neuroscience Source Type: research

Age-Dependence of Flow Homeostasis in the Left Ventricle
Conclusions: In average, blood spends 1 to 3 beats inside the LV with very low shear stress rates. The apical region is the most prone to blood stasis, particularly in mid-aged adults. The washout of blood in the normal LV is age-dependent due to physiological changes in the degree of apical penetration of the filling waves. Introduction Cardioembolic stroke is a major source of mortality and disability worldwide and blood stasis one of its major determinants (Adams et al., 1986). Left ventricular (LV) function has evolved to maximize mechanical efficiency and ensure organ perfusion at a low cost of energy and fill...
Source: Frontiers in Physiology - April 25, 2019 Category: Physiology Source Type: research