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Specialty: Neurology
Procedure: Perfusion

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Total 1377 results found since Jan 2013.

Epileptic seizures in the emergency room: clinical and electroencephalographic findings associated with brain perfusion patterns on computed tomography
ConclusionsIn acute settings, detection by visual analysis of focal cerebral cortical hyperperfusion on pCT in patients with epileptic seizures, especially if accompanied by the highly specific feature of thalamic hyperperfusion, is suggestive of a diagnosis of SE and requires clinical and EEG confirmation. The absence of focal hyperperfusion makes a diagnosis of SE unlikely.
Source: Journal of Neurology - February 13, 2022 Category: Neurology Source Type: research

Penumbra Detection With Oxygen Extraction Fraction Using Magnetic Susceptibility in Patients With Acute Ischemic Stroke
ConclusionTissue volumes with increased OEF values could predict ischemic penumbra volumes based on DSC-MRI, highlighting the potential of the QSM-derived OEF map as a penumbra biomarker to guide treatment selection in patients with acute ischemic stroke.
Source: Frontiers in Neurology - February 11, 2022 Category: Neurology Source Type: research

Disentangling Workflow Paradigms and Treatment Decision-Making in Acute Ischemic Stroke —Reply
In Reply We thank Ospel and Goyal for their interest in the Evaluation of Direct Transfer to Angiography Suite vs Computed Tomography Suite in Endovascular Treatment (ANGIOCAT) study and read with interest their letter in which they express some concerns in relation to the direct-to-angiography suite (DTAS) paradigm. In the ANGIOCAT study, patients adjudicated to the conventional imaging group, despite receiving computed tomography perfusion (CTP) in some cases, achieved one of the shortest workflow times reported ever (door-to-puncture time of 44 minutes). According to guidelines, CTP was never used to exclude patients fr...
Source: JAMA Neurology - February 7, 2022 Category: Neurology Source Type: research

Phosphorylation of PI3K/Akt at Thr308, but not MAPK kinase, mediates lithium-induced neuroprotection against cerebral ischemia in mice
Exp Neurol. 2022 Feb 2:113996. doi: 10.1016/j.expneurol.2022.113996. Online ahead of print.ABSTRACTLithium, in addition to its effect on acute and long-term bipolar disorder, is involved in neuroprotection after ischemic stroke. Yet, its mechanism of action is still poorly understood, which was only limited to its modulatory effect on GSK pathway. Therefore, we initially analyzed the dose-dependent effects of lithium on neurological deficits, infarct volume, brain edema and blood-brain barrier integrity, along with neuronal injury and survival in mice subjected to focal cerebral ischemia. Thereafter, we investigated the in...
Source: Experimental Neurology - February 5, 2022 Category: Neurology Authors: Nilay Ates Aysun Caglayan Zeynep Balcikanli Elif Sertel Mustafa Caglar Beker Pelin Dilsiz Ahmet Burak Caglayan S üleyman Celik Muhammed Furkan Dasdelen Berrak Caglayan T ürkan Yigitbasi Hanefi Ozbek Thorsten Roland Doeppner Dirk Matthias Hermann Ertugru Source Type: research

Clinical Relevance of Computed Tomography Perfusion-Estimated Infarct Volume in Acute Ischemic Stroke Patients within the 6-h Therapeutic Time Window
Conclusion: Larger initial infarct volumes are significantly associated with worse clinical outcomes in patients who underwent EVT because of early time window stroke. Furthermore, our study of 6-h data demonstrated that an initial infarction of more than a certain volume might be an independent risk factor for sICH development and poor outcomes even in patients with successful recanalization. However, we still observed benefits of EVT in patients with large ischemic cores. The CTP-estimated infarct volume might be an important prognostic factor after EVT rather than a biomarker predicting treatment effectiveness.Cerebrovasc Dis
Source: Cerebrovascular Diseases - January 21, 2022 Category: Neurology Source Type: research

Intravenous thrombolysis for acute ischemic stroke: why not?
Purpose of review The aim of this study was to summarize available evidence regarding the safety and efficacy of intravenous thrombolysis (IVT) using recombinant tissue-plasminogen activator (rt-PA) in acute ischemic stroke (AIS) patients with specific comorbidities and potential contraindications to systemic reperfusion therapy. Recent advances in IVT implementation in wake-up stroke and in extended time window using advanced neuroimaging will also be highlighted. Recent findings Despite theoretical concerns of a higher bleeding risk with IVT, there are no data showing increased risk of symptomatic intracerebra...
Source: Current Opinion in Neurology - January 19, 2022 Category: Neurology Tags: CEREBROVASCULAR DISEASE: Edited by Diana Aguiar de Sousa Source Type: research

Insights into a personalized management of blood pressure in acute stroke
Purpose of review Blood pressure management in acute stroke has long been a matter of debate. Epidemiological data show that high blood pressure is associated with death, disability and early stroke recurrence, whereas the pathophysiological rationale for ensuring elevated blood pressure in order maintain adequate cerebral perfusion remains a pertinent argument, especially in ischaemic stroke. Recent findings The European Stroke Organisation Guidelines on blood pressure management in acute ischaemic stroke and intracerebral haemorrhage provide recommendations for the appropriate management of blood pressure in v...
Source: Current Opinion in Neurology - January 19, 2022 Category: Neurology Tags: CEREBROVASCULAR DISEASE: Edited by Diana Aguiar de Sousa Source Type: research

U-net Models Based on Computed Tomography Perfusion Predict Tissue Outcome in Patients with Different Reperfusion Patterns
AbstractEvaluation of cerebral perfusion is important for treatment selection in patients with acute large vessel occlusion (LVO). To assess ischemic core and tissue at risk more accurately, we developed a deep learning model named U-net using computed tomography perfusion (CTP) images. A total of 110 acute ischemic stroke patients undergoing endovascular treatment with major reperfusion ( ≥ 80%) or minimal reperfusion (≤ 20%) were included. Using baseline CTP, we developed two U-net models: one model in major reperfusion group to identify infarct core; the other in minimal reperfusion group to identify tissue at r...
Source: Translational Stroke Research - January 19, 2022 Category: Neurology Source Type: research

Middle Cerebral Artery Pulsatility Index Correlates with Prognosis and Diastolic Dysfunctions in Acute Ischemic Stroke
Adequate tissue perfusion is a requirement for optimal organ function, and is dependent upon the distribution of cardiac output and local vasculature.1
Source: Journal of Stroke and Cerebrovascular Diseases - January 13, 2022 Category: Neurology Authors: Takeo Sato, Akira Niijima, Ayumi Arai, Takahiro Maku, Haruhiko Motegi, Maki Takahashi, Hiroki Takatsu, Maki Tanabe, Teppei Komatsu, Kenichi Sakuta, Kenichiro Sakai, Yuka Terasawa, Tadashi Umehara, Shusaku Omoto, Hidetomo Murakami, Hidetaka Mitsumura, Yasu Source Type: research

Diagnostic value of whole-brain computed tomographic perfusion imaging for suspected large artery occlusion stroke patients in emergency department
ConclusionThis retrospective study indicates WB-CTP can be useful in identifying acute ischemic stroke in emergency department, especially for patients with acute LAO stroke. Moreover, WB-CTP may have a value in differentiating stroke mimics such as epilepsy and CVST.
Source: Acta Neurologica Belgica - January 12, 2022 Category: Neurology Source Type: research

Associations Among Diffusion Tensor Image Along the Perivascular Space (DTI-ALPS), Enlarged Perivascular Space (ePVS), and Cognitive Functions in Asymptomatic Patients With Carotid Plaque
Conclusions: ALPS-index reflects the glymphatic system of the brain, which is associated with early high-risk cerebrovascular diseases. There may be damage in the function of the glymphatic system which induces the expansion of the perivascular space (PVS) in the BG in individuals with carotid plaque.
Source: Frontiers in Neurology - January 4, 2022 Category: Neurology Source Type: research

Study on the Correlation Between Ischemic Leukoaraiosis and Cerebral Large Artery Stenosis Using the Stages of the Preinfarction Period Based on the Result of Computed Tomography Perfusion
Background and Objective: The influence of cerebral large artery stenosis (CLAS) on ischemic leukoaraiosis (LA) remains elusive. Based on the proposed stages of the preinfarction period, this study aimed to adopt the staging system to assess the correlation between ischemic LA and CLAS. Materials and Methods: Patients with unilateral CLAS ≥50% and without cerebral stroke were screened. The severity and distribution of stenosis were evaluated on computed tomography angiography images. The degree of regional cerebral perfusion was rated according to the stages of preinfarction period: 0=normal, 1=stage Ia, 2=sta...
Source: The Neurologist - January 1, 2022 Category: Neurology Tags: Original Articles Source Type: research

Error in Author Name
This article was corrected online.
Source: JAMA Neurology - January 1, 2022 Category: Neurology Source Type: research