What Threshold Defines Penumbral Brain Tissue in Patients with Symptomatic Anterior Circulation Intracranial Stenosis: An Exploratory Analysis

CONCLUSIONSA target mismatch profile usingTmax  >  6 seconds may define tissue at risk in patients with acute symptomatic proximal anterior circulation intracranial stenosis. More studies are needed to confirm our findings.
Source: Journal of Neuroimaging - Category: Radiology Authors: Tags: Clinical Investigative Study Source Type: research

Related Links:

ConclusionsThe lowered MD index early after mechanical recanalization without BGC usage can be interpreted as microstructural ischemic damage of the salvaged penumbra. It was shown that achieving complete reperfusion in a setting of BGC usage with proximal flow arrest minimizes penumbral damage and improves long-term outcomes.Key Points• Microstructural ischemic damage can be reduced by using proximal flow arrest during endovascular treatment with balloon guide catheter.• Complete reperfusion in a setting of balloon guide catheter minimizes penumbral damage and improves long-term outcome.
Source: European Radiology - Category: Radiology Source Type: research
ConclusionIn our population, data suggest improved outcomes after EVT in carotid-I occlusion patients and provide no arguments to withhold EVT in these patients.
Source: Neuroradiology - Category: Radiology Source Type: research
BACKGROUND AND PURPOSE: When mapping the ischemic core and penumbra in patients with acute ischemic stroke using perfusion imaging, the core is currently delineated by applying the same threshold value for relative CBF at all time points from onset to imaging. We investigated whether the degree of perfusion abnormality and optimal perfusion parameter thresholds for defining ischemic core vary with time from onset to imaging. MATERIALS AND METHODS: In a prospectively maintained registry, consecutive patients were analyzed who had ICA or M1 occlusion, baseline perfusion and diffusion MR imaging, treatment with IV tPA and/or...
Source: American Journal of Neuroradiology - Category: Radiology Authors: Tags: FUNCTIONAL Source Type: research
ConclusionAcute organ malperfusion caused by the aortic dissection requires accurate and prompt diagnosis to proceed with an appropriate intervention before repairing the central aorta for preventing irreversible organ damage.
Source: Journal of Cardiac Surgery - Category: Cardiovascular & Thoracic Surgery Authors: Tags: ORIGINAL ARTICLE Source Type: research
CONCLUSIONS: Our study found fast multi-slice T1app imaging improves the accuracy and reproducibility of CBF measurement. PMID: 32970848 [PubMed - as supplied by publisher]
Source: Magnetic Resonance in Medicine - Category: Radiology Authors: Tags: Magn Reson Med Source Type: research
Abstract Enriched environment (EE) with a complex combination of sensorimotor, cognitive and social stimulations has been shown to enhance brain plasticity and improve recovery of functions in animal models of stroke. The present study extended these findings by assessing whether the three-phase EE intervention paradigm would improve neurovascular remodeling following ischemic stroke. Male Sprague-Dawley rats were subjected to permanent middle cerebral artery occlusion (MCAO). A three-phase EE intervention paradigm was designed in terms of the different periods of cerebral ischemia by periodically rearranging the ...
Source: Neurobiology of Disease - Category: Neurology Authors: Tags: Neurobiol Dis Source Type: research
Abstract OBJECTIVES: Cerebral blood flow (CBF) measurements after endovascular therapy (EVT) for acute ischemic stroke are important to distinguish early secondary injury related to persisting ischemia from that related to reperfusion when considering clinical response and infarct growth. METHODS: We compare reperfusion quantified by the modified Thrombolysis in Cerebral Infarction Score (mTICI) with perfusion measured by MRI dynamic contrast-enhanced perfusion within 5 h of EVT anterior circulation stroke. MR perfusion (rCBF, rCBV, rTmax, rT0) and mTICI scores were included in a predictive model for change i...
Source: The British Journal of Radiology - Category: Radiology Authors: Tags: Br J Radiol Source Type: research
Despite improved treatment, a large portion of patients with acute ischemic stroke due to a large vessel occlusion have poor functional outcome. Further research exploring novel treatments and better patient selection has therefore been initiated. The feasibility of new treatments and optimized patient selection are commonly tested in extensive and expensive randomized clinical trials. in-silico trials, computer-based simulation of randomized clinical trials, have been proposed to aid clinical trials. In this white paper, we present our vision and approach to set up in-silico trials focusing on treatment and selection of p...
Source: Frontiers in Neurology - Category: Neurology Source Type: research
AbstractPurposeComputed tomography angiography (CTA) is routinely used to detect large-vessel occlusion (LVO) in patients with suspected acute ischemic stroke; however, visual analysis is time consuming and prone to error. To evaluate solutions to support imaging triage, we tested performance of automated analysis of CTA source images (CTASI) at identifying patients with LVO.MethodsStroke patients with LVO were selected from a  prospectively acquired cohort. A control group was selected from consecutive patients with clinically suspected stroke without signs of ischemia on CT perfusion (CTP) or infarct on follow-...
Source: Clinical Neuroradiology - Category: Neurology Source Type: research
CONCLUSIONS: DWI volume, PWI volume and>3 passes with the retriever were able to predict the ICH in patients with AIS after EVT therapy. PMID: 32913526 [PubMed]
Source: American Journal of Translational Research - Category: Research Tags: Am J Transl Res Source Type: research
More News: Brain | Databases & Libraries | Ischemic Stroke | Neurology | Perfusion | Radiology | Stroke | Study