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Specialty: Neurology
Procedure: Perfusion
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Total 1377 results found since Jan 2013.
Personalised simulation of hemodynamics in cerebrovascular disease: lessons learned from a study of diagnostic accuracy
In this study, we performed the first quantitative validation of a simulation-based precision medicine framework to assess cerebral hemodynamics in patients with ICAD against clinical standard perfusion imaging. In a retrospective analysis, we used a 0-dimensional simulation model to detect brain areas that are hemodynamically vulnerable to subsequent stroke. The main outcome measures were sensitivity, specificity, and area under the receiver operating characteristics curve (ROC AUC) of the simulation to identify brain areas vulnerable to subsequent stroke as defined by quantitative measurements of relative mean transit ti...
Source: Frontiers in Neurology - September 12, 2023 Category: Neurology Source Type: research
Association of Ferroptosis with Severity and Outcomes in Acute Ischemic Stroke Patients Undergoing Endovascular Thrombectomy: A Case-control Study
AbstractFerroptosis, an iron-dependent form of cell death, is characterized by intracellular accumulation of iron and reactive oxygen species-induced lipid peroxidation. Animal experiments have shown the important roles of ferroptosis in ischemic stroke, but the evidence in human stroke is insufficient. This prospective study evaluated the associations between plasma ferroptosis biomarkers at hyperacute stage and long-term outcomes in patients with acute ischemic stroke undergoing endovascular thrombectomy (EVT). The plasma samples were collected immediately before and after EVT (T1 and T2) and at 24 h (T3) for the 126 s...
Source: Molecular Neurobiology - September 7, 2023 Category: Neurology Source Type: research
Prognostic Value of Venous Outflow Profiles on Multiphase CT Angiography for the Patients with Acute Ischemic Stroke After Endovascular Thrombectomy
This study supports that favorable peak venous VO profiles on mCTA might be a promising biomarker in predicting the good outcome in patients with AIS after EVT.
Source: Translational Stroke Research - September 5, 2023 Category: Neurology Source Type: research
Association of Ferroptosis with Severity and Outcomes in Acute Ischemic Stroke Patients Undergoing Endovascular Thrombectomy: A Case-control Study
AbstractFerroptosis, an iron-dependent form of cell death, is characterized by intracellular accumulation of iron and reactive oxygen species-induced lipid peroxidation. Animal experiments have shown the important roles of ferroptosis in ischemic stroke, but the evidence in human stroke is insufficient. This prospective study evaluated the associations between plasma ferroptosis biomarkers at hyperacute stage and long-term outcomes in patients with acute ischemic stroke undergoing endovascular thrombectomy (EVT). The plasma samples were collected immediately before and after EVT (T1 and T2) and at 24 h (T3) for the 126 s...
Source: Molecular Neurobiology - September 1, 2023 Category: Neurology Source Type: research
Quantitative assessment of collateral time on perfusion computed tomography in acute ischemic stroke patients
ConclusionOur results indicate that perfusion computed tomography can accurately quantify the collateral time after acute ischemic stroke.
Source: Frontiers in Neurology - August 24, 2023 Category: Neurology Source Type: research
Factors Influencing Collateral Circulation Formation After Indirect Revascularization for Moyamoya Disease: a Narrative Review
This study summarizes the factors and mechanisms influencing collateral circulation formation after indirect revascularization in Moyamoya disease.
Source: Translational Stroke Research - August 17, 2023 Category: Neurology Source Type: research
Thrombectomy with and without computed tomography perfusion imaging for large-vessel occlusion stroke in the extended time window: a meta-analysis of randomized clinical trials
ConclusionThese findings suggest that the choice of NCCT ± CTA (without CTP) for the assessment of mechanical thrombectomy within 6–24 h after LVO in the anterior circulation is not significantly different from CTP; instead, the choice of NCCT ± CTA significantly reduces the time from onset to arterial puncture.
Source: Frontiers in Neurology - August 17, 2023 Category: Neurology Source Type: research
Tmax volume can predict clinical type in patients with acute ischemic stroke
ConclusionTheTmax volume derived from perfusion imaging predicts the clinical classification of AIS patients before EVT.
Source: Brain and Behavior - July 20, 2023 Category: Neurology Authors: Fumihisa Kishi,
Ichiro Nakagawa,
Seigo Kimura,
Daiji Ogawa,
Ryokichi Yagi,
Keiichi Yamada,
Hirokatsu Taniguchi Tags: ORIGINAL ARTICLE Source Type: research
Update on Large-Vessel Revascularization in Acute Ischemic Stroke
AbstractPurpose of reviewThis review presents the critical appraisal of current therapeutic strategies for patients with large-vessel occlusion (LVO) acute ischemic stroke (AIS). We provide the reader with most recent evidence supporting endovascular thrombectomy (EVT), different techniques used for thrombectomy, and highlight knowledge gaps regarding therapeutic efficacy of this intervention in respective subgroup of these patients based on site of occlusion, size of ischemic core, time from symptom onset, utility of concurrent intravenous thrombolysis (IVT), mild strokes, or tandem occlusions.Recent findingsEVT is the es...
Source: Current Treatment Options in Neurology - July 1, 2023 Category: Neurology Source Type: research
Dynamic Measurements of Cerebral Blood Flow Responses to Cortical Spreading Depolarization in the Murine Endovascular Perforation Subarachnoid Hemorrhage Model
AbstractDelayed cerebral ischemia (DCI) is the most severe complication after subarachnoid hemorrhage (SAH), and cortical spreading depolarization (CSD) is believed to play a vital role in it. However, the dynamic changes in cerebral blood flow (CBF) in response to CSD in typical SAH models have not been well investigated. Here, SAH was established in mice with endovascular perforation. Subsequently, the spontaneous CBF dropped instantly and then returned to baseline rapidly. After KCl application to the cortex, subsequent hypoperfusion waves occurred across the groups, while a lower average perfusion level was found in th...
Source: Translational Stroke Research - June 29, 2023 Category: Neurology Source Type: research
Clinical Significance and Influencing Factors of Microvascular Tissue Reperfusion After Macrovascular Recanalization
In this study, we aimed to investigate the impact of tissue optimal reperfusion (TOR) and its influencing factors. From December 1, 2020 to December 1, 2021, AIS patients with successful recanalization (modified Thrombolysis in Cerebral Infarction score [mTICI] ≥ 2b) after mechanical thrombectomy (MT) were retrospectively reviewed. Computed tomography perfusion was performed before and after MT. Successful reperfusion was assessed by TOR, defined as > 90% reduction of the Tmax > 6 s lesion volumes between baseline and early follow-up perfusion profiles. The impact of TOR on functional outcomes after...
Source: Translational Stroke Research - June 29, 2023 Category: Neurology Source Type: research
Assessment of Irreversible Tissue Injury in Extensive Ischemic Stroke —Potential of Quantitative Cerebral Perfusion
AbstractComputed tomography perfusion (CTP) is used as a tool to select ischemic stroke patients for endovascular treatment (EVT) and is currently investigated in the setting of extensive stroke with low Alberta Stroke Program Early CT scores (ASPECTS). The purpose of this study was to perform a comprehensive quantitative analysis of cerebral blood flow within the ischemic lesion compared to threshold-derived core lesion volumes. We hypothesized that the degree of cerebral blood volume (CBV) reduction within the ischemic lesion is predictive of irreversible tissue injury and functional outcome in patients with low ASPECTS....
Source: Translational Stroke Research - June 29, 2023 Category: Neurology Source Type: research
Association of admission plasma glucose level and cerebral computed tomographic perfusion deficit volumes
Hyperglycemia in acute ischemic stroke (AIS) is frequent and associated with worse outcome. Yet, strict glycemic control in AIS patients has failed to yield beneficial outcome. So far, the underlying pathophysiological mechanisms of admission hyperglycemia in AIS have remained not fully understood. We aimed to evaluate the yet equivocal association of hyperglycemia with computed tomographic perfusion (CTP) deficit volumes.
Source: Journal of the Neurological Sciences - June 26, 2023 Category: Neurology Authors: Laura Mannism äki, Nicolas Martinez-Majander, Gerli Sibolt, Olli Suomalainen, Katariina Bäcklund, Ahmed Elseoud Abou, Juha Järveläinen, Nina Forss, Sami Curtze Source Type: research
Analysis of Risk Factors for Epilepsy after Combined Re-Vascularization in Adult Patients with Moyamoya Disease
Conclusions: Pre-operative epilepsy, the location of the bypass recipient artery, new cerebral infarction, hyper-perfusion syndrome, and intra-cranial hemorrhage may have a causal relationship with epilepsy in adult MMD patients. It is suggested that some risk factors could be intervened to reduce the incidence of post-operative epilepsy in MMD patients.
Source: Neurology India - June 15, 2023 Category: Neurology Authors: Erheng Liu Lide Jin Weihua Tao Xueyi Tan Chengyuan Liu Shuai Zhou Shengquan Huang Xiying Qian Jianhua Zhao Xuehua Li Shuaifeng Yang Source Type: research
Autonomic function may mediate the neuroprotection of remote ischemic postconditioning in stroke: A randomized controlled trial
Acute ischemic stroke(AIS) is one of the leading causes of death and long-lasting disability on a global level, with an increased global burden in the past two decades.1,2 Early restoration of blood flow is currently recognized as the most effective therapy for AIS. However, rapid reperfusion after a certain period of ischemia could paradoxically induce ischemia-perfusion injury (IRI), which can promote neurovascular inflammation by inducing the generation of cytokines, and thus aggravate stroke severity and adverse neurological outcomes.
Source: Journal of Stroke and Cerebrovascular Diseases - June 15, 2023 Category: Neurology Authors: Hao Liang, Richun Ye, Xiaopei Zhang, Huanwen Ye, Wenwei Ouyang, Shuang Cai, Lin Wei Source Type: research
