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Imaging the bio-impedance distribution of the brain can provide initial diagnosis of acute stroke. This paper presents a compact and non-radiative tomographic modality, i.e. multi-frequency Electromagnetic Tomography (mfEMT), for the initial diagnosis of acute stroke. The mfEMT system consists of 12 channels of gradiometer coils with adjustable sensitivity and excitation frequency. To solve the image reconstruction problem of mfEMT, we propose an enhanced Frequency-Constrained Sparse Bayesian Learning (FC-SBL) to simultaneously reconstruct the conductivity distribution at all frequencies. Based on the Multiple Measurement Vector (MMV) model in the Sparse Bayesian Learning (SBL) framework, FC-SBL can recover the underlying distribution pattern of conductivity among multiple images by exploiting the frequency constraint information. A realistic 3D head model was established to simulate stroke detection scenarios, showing the capability of mfEMT to penetrate the highly resistive skull and improved image quality with FC-SBL. Both simulations and experiments showed that the proposed FC-SBL method is robust to noisy data for image reconstruction problems of mfEMT compared to the single measurement vector model, which is promising to detect acute strokes in the brain region with enhanced spatial resolution and in a baseline-free manner. [ABSTRACT FROM AUTHOR]

Objective: Acute stroke treatments reduce the likelihood of post-stroke disability, but are vastly underutilized. In this paper, we describe the development, adaptation, and scale-up of the Stroke Ready program - a health behavior theory-based stroke preparedness intervention that addresses underlying behavioral factors that contribute to acute stroke treatment underutilization. Methods: Through a community-based participatory research (CBPR) approach, we conducted needs and determinant assessments, which informed creation and pilot testing of Stroke Ready. Based on these results, we then scaled Stroke Ready to the entire community by greatly expanding the delivery system. Results: The scaled Stroke Ready program is a community-wide stroke preparedness education program consisting of peer-led workshops, print materials, and digital, social, and broadcast media campaigns. Whereas the Stroke Ready pilot workshop was delivered to 101 participants, 5945 participants have received the scaled Stroke Ready peer-led workshop to date. Additionally, we have sent mailers to over 44,000 households and reached approximately 35,000 people through our social media campaign. Conclusion: Strategies including an expanded community advisory board, adaptation of the intervention and communityengaged recruitment facilitated the scale-up of Stroke Ready, which may serve as a model to increase acute stroke treatment rates, particularly in majority African-American communities. [ABSTRACT FROM AUTHOR]

Acute stroke (the first hours after its onset) is accompanied in over 70% of cases by rapid and significant increases in blood pressure, above normal values. The acute or reactive hypertensive response occurs both in patients with a history of hypertension and in normotensive patients. The greatly increased BP values, not controlled therapeutically, can befollowed by the increase in the volume of the cerebral infarct and hemorrhagic transformation or thee xpansion of the hematoma and the increase in intracerebral pressure, respectively in ischemic or hemorrhagic stroke. This paper especially refers to the therapeutic control of hypertension in various situations (conditions): 1. Laboratory emergencies; 2. Hospital treatment with out thrombolytics or thrombolysis; 3. Endovascular treatment in acute stroke; 4. BP control in hemorrhagic stroke; 5. Continuation or discontinuation of antihypertensive treatement. The updated recommendations for the treatment of HTN in acute stroke result from clinical studies and recommendations of the recent ESO and AHA/ASA Guidelines. [ABSTRACT FROM AUTHOR]

Decision-making among older patients with stroke, their families and professionals has been extensively studied in a Western context, but there has been little prior work in China. The study reported here explored how decision-making took place between older people with stroke, their family carers and professionals in an acute care context in mainland China using a constructivist grounded theory approach. Data were collected through semi-structured interviews, participant observation and documentary analysis. Constant comparative analysis of the data was carried out. This paper focuses on the key social process of ‘hiding’ and its dynamic relationship with the core category ‘keeping the peace’. In order to meet the traditional Chinese cultural value of ‘maintaining harmony’, both family carers and professionals hid essential information from older stroke survivors who, as a consequence, were effectively precluded from playing an active role in major decisions. In understanding ‘hiding’, the paper draws upon both Chinese cultural values and ‘awareness context theory’ and in so doing questions the relevance to the Chinese context of key Western notions such as involvement in health-care decision-making. A better understanding of the experiences of decision-making processes between older people with stroke, their family carers and professionals in China will help professionals to provide the best possible support and care whilst promoting informed decision-making amongst all concerned. [ABSTRACT FROM PUBLISHER]

Background: Mechanical thrombectomy (MT) has become the mainstay of treatment for acute ischemic stroke (AIS) recently. This case-control study aimed to identify the pivotal role of inflammation in the prognosis of AIS patients after MT. Methods: Altogether, 70 AIS patients who underwent MT were retrospectively recruited for this study. Receiver operating characteristic analysis was performed to demonstrate the sensitivity and specificity of the inflammatory variables for predicting prognosis. A meta-analysis was performed to pool the published results together. Stata software was used for analysis. Results: There was no differences in pre-MT inflammatory biomarkers between patients who survived and those who died, as well as patients with modified Rankin Scale (mRS) 0–2 and mRS ≥ 3. In contrast, post-MT C-reactive protein (CRP) levels might be a potential parameter to predict death after thrombectomy [area under the curve (AUC), 95%confidence interval (CI), 0.737, 0.587–0.887; p = 0.005; optimal cutoff value = 4.565]. Moreover, post-MT monocyte count might be an appropriate parameter to predict poor long-term prognosis after thrombectomy (AUC, 95%CI, 0.704, 0.575–0.833; p = 0.017; optimal cutoff value = 0.345). A meta-analysis revealed that the pre-MT inflammatory indices, including white blood cell count (weighted mean difference, 95%CI, 1.32, 1.01—1.63), neutrophil count (1.23, 0.95—1.51), monocyte count (0.05, 0.02—0.09), neuthrophil-to-lymphocyte ratio (2.42, 1.98—2.87) and platelet-to-lymphocyte ratio (24.65, 7.99—41.32), were higher in patients with 3-month mRS ≥ 3, and the lymphocyte count (−0.31,−0.43 to −0.18) was lower in this cohort. Conclusions: Inflammatory indices were significantly associated with the prognosis of patients undergoing MT, especially post-MT CRP and monocyte count, which can predict long-term outcomes. [ABSTRACT FROM AUTHOR]

An estimated 15 million people worldwide suffer a stroke each year, and in developed countries, survival is increasing. Of those who survive 30 days or more after their first event, many experience stroke-related vision and visual problems. Although screening for such problems after diagnosis of stroke is recommended, no standard method for complying with this recommendation is available. As visual problems are not always recognised by the sufferer, or obvious to others, they can be overlooked. Undetected problems result in distress to the individual and the people important to them, and may result in longer stays in hospital or repeat admissions. Health professionals in the acute care setting need to be aware that there is a risk of visual problems after stroke and have access to best practice guidance for screening, assessment and management of stroke-related visual problems. This paper describes the process used by a multidisciplinary team to develop a best practice statement for screening, assessment and management of vision problems during the acute phase of stroke. [ABSTRACT FROM AUTHOR]

Background To assist small hospitals in providing advanced stroke treatment, the Norwegian Directorate of Health has recommended telemedicine services. Telestroke enables specialists to examine patients via videoconferencing supplemented by teleradiology and to provide decision support to local health care personnel. There is evidence that telestroke increases thrombolysis rates. In Norway, telemedicine has mainly been used in non-critical situations. The first telestroke trials took place in 2008. The aim of this paper is to present an overview of telestroke trials and today's status with telestroke in Norway. Based on the divergent experience from two health regions in Norway, the paper discusses crucial factors for the integration of telestroke in clinical practice. Methods This is a descriptive study based on multiple methods to obtain an overview of the practice and experience with telestroke in Norway. A Web and literature search for 'telestroke in Norway' was performed and compared with a survey of telemedicine services at the country's largest hospitals. These findings were supplemented by interviews with key personnel involved in telestroke in two of four health regions, as well as hospital field observations and log data of telestroke transmissions from five of the hospitals involved. Results In Norway, experience in telemedicine for acute stroke care is limited. At the beginning of 2014, three of four regional health authorities were working with telestroke projects and services. Integration of the service in practice is challenging, with varying experience. The problems are not attributed to the technology in itself, but to organization (availability of staff on duty 24/7 and surveillance of the systems), motivation of staff, logistics (patient delay), and characteristics of the buildings (lack of space). Conclusions Prerequisites for successful integration of telestroke in clinical practice include realization of the collaboration potential in the technology with consistent procedures for training and triage, availability of the equipment, and providing advice beyond questions concerning thrombolysis. [ABSTRACT FROM AUTHOR]

Background: The PRE-hospital Stroke Treatment Organization was formed in 2016 as an international consortium of medical practitioners involved in pre-hospital treatment of patients with acute stroke. Aims: PRE-hospital Stroke Treatment Organization's mission is to improve stroke outcomes by supporting research and advocacy for pre-hospital stroke treatment in Mobile Stroke Units. PRE-hospital Stroke Treatment Organization will provide a platform to enhance collaborative research across the spectrum of acute stroke management in the prehospital setting. PRE-hospital Stroke Treatment Organization will also facilitate the appropriate proliferation and distribution of Mobile Stroke Units by providing a forum for professional communication, resource for public education, and stimulus for government, industry, and philanthropic support. Summary of review: In this "white paper", we describe the evidence supporting pre-hospital stroke treatment, progress to date, practical issues such as application in various environments and staffing, planned research initiatives, and organizational structure. Conclusions: PRE-hospital Stroke Treatment Organization is not-for-profit, with membership open to anyone involved (or hoping to become involved) in pre-hospital stroke care. PRE-hospital Stroke Treatment Organization has a Steering Committee comprised of members from Europe, U.S., Canada, Australia, and other regions having a Mobile Stroke Unit in operation. PRE-hospital Stroke Treatment Organization convenes satellite meetings for membership at the International Stroke Conference and European Stroke Congress each year to address the PRE-hospital Stroke Treatment Organization mission. The first research collaborations agreed upon are to: (1) develop a list of common data elements to be collected by all Mobile Stroke Unit programs and entered into a common research database, and (2) develop a protocol for investigating the natural history of hyper-acute Intracerebral Hemorrhage. [ABSTRACT FROM AUTHOR]

Objective: This study aims to develop and validate the Futile Recanalization Prediction Score (FRPS), a novel tool designed to predict the severity risk of FR and aid in pre- and post-EVT risk assessments. Methods: The FRPS was developed using a rigorous process involving the selection of predictor variables based on clinical relevance and potential impact. Initial equations were derived from previous meta-analyses and refined using various statistical techniques. We employed machine learning algorithms, specifically random forest regression, to capture nonlinear relationships and enhance model performance. Cross-validation with five folds was used to assess generalizability and model fit. Results: The final FRPS model included variables such as age, sex, atrial fibrillation (AF), hypertension (HTN), diabetes mellitus (DM), hyperlipidemia, cognitive impairment, pre-stroke modified Rankin Scale (mRS), systolic blood pressure (SBP), onset-to-puncture time, sICH, and NIHSS score. The random forest model achieved a mean R-squared value of approximately 0.992. Severity ranges for FRPS scores were defined as mild (FRPS < 66), moderate (FRPS 66–80), and severe (FRPS > 80). Conclusions: The FRPS provides valuable insights for treatment planning and patient management by predicting the severity risk of FR. This tool may improve the identification of candidates most likely to benefit from EVT and enhance prognostic accuracy post-EVT. Further clinical validation in diverse settings is warranted to assess its effectiveness and reliability. [ABSTRACT FROM AUTHOR]

Purpose: In the treatment of intracranial arterial stenosis (ICAS), controversies remain regarding the optimal treatment strategy. Our study aims to conduct an individual patient-level data meta-analysis of existing RCTs comparing PTAS versus best medical therapy and to identify differences in outcomes such as incidence of ischemic stroke or death. Methods: Randomised controlled trials comparing the outcomes of stenting versus best medical therapy for patients who had symptomatic ICAS of >50%. Excluded studies included case reports, case series, reviews, observational studies, letters or studies evaluating isolated angioplasty techniques without stenting. Data was extracted in accordance with PRISMA guidelines. Results: 7 studies involving 1425 participants were included. There was an increased risk in the incidence of stroke and death within the first 30 days post-procedure for patients treated with PTAS over best medical therapy (RR = 2.22 [1.28–3.86], I² = 0%). Patients who underwent stenting also had a significantly higher risk of intracranial haemorrhage (RR = 12.66 [2.41–66.45], I² = 0%) and death (RR = 5.41 [1.20–24.28], I² = 0%). Under the shared frailty model, stenting when compared to medical therapy has a HR of 1.81 (95% CI:1.25–2.6) of stroke or death across 1 year. Under the parametric Royston-Parmar model, stenting has a significant decrease in the RMST(–0.83 months; 95% CI: –1.30–0.37). Stenting continued to show worse outcomes up to the 3 year mark with a HR of 1.60 (95% CI: 1.11–2.32). Conclusions and Relevance: There is an increased risk of peri- and post-procedural stroke and death over best medical therapy in patients with symptomatic ICAS who undergo PTAS. Further work is required to refine patient selection and mitigate peri-procedural risks. [ABSTRACT FROM AUTHOR]

Stroke management employs a variety of diagnostic imaging modalities, image processing and analysis methods, and treatment procedures. This work categorizes methods for stroke imaging, image processing and analysis, and treatment, and provides their taxonomies illustrated by a state-of-the-art review. Imaging plays a critical role in stroke management, and the most frequently employed modalities are computed tomography (CT) and magnetic resonance (MR). CT includes unenhanced non-contrast CT as the first-line diagnosis, CT angiography, and CT perfusion. MR is the most complete method to examine stroke patients. MR angiography is useful to evaluate the severity of artery stenosis, vascular occlusion, and collateral flow. Diffusion-weighted imaging is the gold standard for evaluating ischemia. MR perfusion-weighted imaging assesses the penumbra. The stroke image processing methods are divided into non-atlas/template-based and atlas/template-based. The non-atlas/template-based methods are subdivided into intensity and contrast transformations, local segmentation-related, anatomy-guided, global density-guided, and artificial intelligence/deep learning-based. The atlas/template-based methods are subdivided into intensity templates and atlases with three atlas types: anatomy atlases, vascular atlases, and lesion-derived atlases. The treatment procedures for arterial and venous strokes include intravenous and intraarterial thrombolysis and mechanical thrombectomy. This work captures the state-of-the-art in stroke management summarized in the form of comprehensive and straightforward taxonomy diagrams. All three introduced taxonomies in diagnostic imaging, image processing and analysis, and treatment are widely illustrated and compared against other state-of-the-art classifications. [ABSTRACT FROM AUTHOR]

The management of blood pressure variability (BPV) in acute stroke presents a complex challenge with profound implications for patient outcomes. This narrative review examines the role of BPV across various stages of acute stroke care, highlighting its impact on treatment strategies and prognostic considerations. In the prehospital setting, while guidelines lack specific recommendations for BP management, emerging evidence suggests a potential link between BPV and outcomes. Among ischaemic stroke patients who are ineligible for reperfusion therapies, BPV independently influences functional outcomes, emphasising the need for individualised approaches to BP control. During intravenous thrombolysis and endovascular therapy, the intricate interplay between BP levels, recanalisation status, and BPV is evident. Striking a balance between aggressive BP lowering and avoiding hypoperfusion-related complications is essential. Intracerebral haemorrhage management is further complicated by BPV, which emerges as a predictor of mortality and disability, necessitating nuanced BP management strategies. Finally, among patients with acute subarachnoid haemorrhage, increased BPV may be correlated with a rebleeding risk and worse outcomes, emphasizing the need for BPV monitoring in this population. Integration of BPV assessment into clinical practice and research protocols is crucial for refining treatment strategies that are tailored to individual patient needs. Future studies should explore novel interventions targeting BPV modulation to optimise stroke care outcomes. [ABSTRACT FROM AUTHOR]

Gaps exist in the knowledge of return-to-driving guidelines, and education is needed for Australian health professionals working in the field of stroke. In this paper, authors evaluate the implementation of an e-learning module. A pre- and post-module knowledge test and survey were used to assess the e-module's success in achieving its learning objectives. Initially, 204 learners completed the module, with 68% of learners scoring 100% in the post-module knowledge test. Only 12 learners completed the survey. The authors recommend that health professionals other than occupational therapists access this e-module, and a review on e-module structure is required to improve results of knowledge tests. [ABSTRACT FROM PUBLISHER]

Introduction. The Registry of Stroke Care Quality (RES-Q) is used in Poland for quality monitoring by numerous hospitals participating in the Angels Initiative. Our aim was to assess the degree of improvement in highly stroke-oriented centres that report cases to the RES-Q each year. Material and methods. This retrospective analysis included Polish stroke units that from January 2017 to December 2020 contributed to the RES-Q at least 25 patients annually. Results. Seventeen out of 180 Polish stroke units reported patients each year (2017, n = 1,691; 2018, n = 2,986; 2019, n = 3,750; 2020, n = 3,975). The percentage of ischaemic stroke patients treated with alteplase remained stable (26%, 29%, 30% and 28%, respectively). The door-to-needle time progressively decreased, from a median 49 minutes to 32 minutes. The percentage of patients treated = 60 minutes and = 45 minutes significantly increased (from 68% to 86% and from 43% to 70%, respectively), with no change observed between 2019 and 2020. Despite a general improvement in dysphagia screening (81%, 91%, 98% and 99%), screening performed within the first 24h from admission became less frequent (78%, 76%, 69% and 65%). In-hospital mortality significantly increased (11%, 11%, 13% and 15%), while the proportion of patients discharged home remained stable. Conclusions. Quality-oriented projects facilitate the improvement of stroke care, even in centres demonstrating good baseline performance. Polish stroke units that consistently reported cases to the RES-Q demonstrated improvement in terms of door-to--needle time and dysphagia screening. However, there is still a need to shorten the time to dysphagia screening, and carefully monitor stroke unit mortality following the COVID-19 pandemic. [ABSTRACT FROM AUTHOR]

OBJECTIVE: Endovascular treatment (EVT) has been demonstrated superior to pharmacological thrombolysis in acute ischemic stroke (AIS) induced by extracranial internal carotid artery occlusion. This paper aims to summarize clinical evidence about EVT and assess its efficacy and safety on acute extracranial carotid occlusion. MATERIALS AND METHODS: We systematically reviewed all studies that reported endovascular therapy as carotid stenting, stent retriever, aspiration, and angioplasty for acute extracranial carotid occlusion. Literature retrieval was performed in PubMed, Embase, and Cochrane library, dated from January 1st, 2005 to December 31st, 2020. The primary endpoint was a favorable outcome rate. Major secondary endpoints were SICH incidence, 90-day mortality rate, and complications. Meta-analysis and subgroup analysis were conducted to identify predictors for prognosis. This systematic review has been registered in PROSPERO (CRD42020181154) on July 18, 2020. RESULTS: 10 studies with 620 patients were included in total. Endovascular approach presented a favorable outcome rate of 0.47 (0.37, 0.56), an acceptable 90-day mortality rate of 0.16 (0.13, 0.19), and a mild SICH rate of 0.07 (0.05, 0.10). Age and NIHSS at admission were negatively associated with favorable outcome, with odds ratio of 0.95 (0.92, 0.98) and 0.74 (0.62, 0.88) respectively. Lower age (p=0.049) and aspiration thrombectomy (p=0.041) predicted less SICH events. In subgroup in which time window > 6 hours, endovascular therapy presented similar encouraging results, with favorable outcome rate of 0.59 (0.51, 0.66), 90-day mortality rate of 0.11 (0.07, 0.17), and SICH rate of 0.04 (0.02, 0.09). CONCLUSIONS: EVT can effectively improve neurological function and reduce 90-day mortality for acute extracranial carotid occlusion patients without increasing the risk of symptomatic intracranial hemorrhage. Endovascular therapy is safe to perform from 6 to 24 hours after symptom onset. [ABSTRACT FROM AUTHOR]

Background: There is increasing evidence for music-based interventions in neurorehabilitation, improving mood and functional outcomes. In response, there is growing interest from health-care providers in setting up Neurologic Music Therapy (NMT) services. This paper presents some preliminary data on the feasibility and acceptability of NMT in the acute stroke, multidisciplinary team setting, about which little is known. Objectives: To assess the feasibility and acceptability of a two-day per-week NMT service over 24 months. Methods: Data were collected on the number of referrals received, sessions attended, sessions declined and reasons why. Staff completed questionnaires, and collected them from patients and their relatives, rating interventions: 1. Not helpful, 2. Quite helpful, 3. Helpful, 4. Very helpful. Patients completed the Visual Analogue Mood Scale (VAMS) pre-/post- a single session. Results: Of 201 patients referred, 177 received treatment and 675 sessions were delivered. Twenty-four patients were discharged before sessions were scheduled and 28 sessions were declined, predominantly due to fatigue. Mean scores (SD) from questionnaire data were: patients (n = 99) 3.34 (0.825), relatives (n = 13) 3.83 (0.372), staff (n = 27) 3.85 (0.388). Mean, post-session VAMS data (n = 52) showed a non-significant reduction in 'Sad' (7.5, p =.007, CI = 2.1, 12.9) and an increase in 'Happy' (+ 6.2, p =.013, CI = −11.0, −1.4). Conclusions: Data suggest the service was feasible and helpful, particularly for patient mood, possibly improving engagement in rehabilitation. Research to determine generalizability in different stroke environments and treatment effects within them is warranted. [ABSTRACT FROM AUTHOR]

Due to the prevalence and severity of stroke, and the emergency of its management, the need of reaching a consensus towards its treatment is of prime importance. This paper's aim is to compare two stroke guidelines by using eGLIA in order to evaluate their implementability. Methods included a systematic assessment of the European (ESO) and American (AHA/ASA) guidelines with eGLIA and a review of literature and analysis of each recommendation with the program. The ESO performs better in Executability and Decidability, as 91.5% and 34.8% of recommendations show no barriers, compared to 81.0% and 14.0% in the AHA/ASA guidelines. On the other hand, AHA/ASA guideline have more recommendations with positive assessments in the Validity and Effect on the Process of Care (91.4% vs 83.0% and 58.1% vs 25%). Results show that ESO guidelines address a wider patient view and that the AHA/ASA guidelines are stricter, only publishing recommendations with a high level of evidence; AHA/ASA guidelines are updated with more frequency and have a clearer sequence of action. Both guidelines show some contradictions, but of minor importance. The strength of this study is the fact that the whole guidelines were read and analysed, and, although we would suggest an improvement of the tool by adding an automatic statistics chart and clarifying some questions, it showed that eGLIA should be used whenever such a text is published. [ABSTRACT FROM AUTHOR]

Imaging protocols of acute ischemic stroke continue to hold significant uncertainties regarding patient selection for reperfusion therapy with thrombolysis and mechanical thrombectomy. Given that patient inclusion criteria can easily introduce biases that may be unaccounted for, the reproducibility and reliability of the patient screening method is of utmost importance in clinical trial design. The optimal imaging screening protocol for selection in targeted populations remains uncertain. Acute neuroimaging provides a snapshot in time of the brain parenchyma and vasculature. By identifying the at-risk but still viable penumbral tissue, imaging can help estimate the potential benefit of a reperfusion therapy in these patients. This paper provides a perspective about the assessment of the penumbral tissue in the context of acute stroke and reviews several neuroimaging models that have recently been developed to assess the penumbra in a more reliable fashion. The complexity and variability of imaging features and techniques used in stroke will ultimately require advanced data driven software tools to provide quantitative measures of risk/benefit of recanalization therapy and help aid in making the most favorable clinical decisions. [ABSTRACT FROM AUTHOR]

Objective: The objective of this work was both to fill this gap in the scientific literature, and to evaluate the results of an Occupational Therapy treatment in individuals affected by an acute phase stroke, taking into account Randomized Controlled Trial (RCT). Methods: A systematic review was carried out according to PRISMA guidelines. Three bibliographic databases were searched, namely MEDLINE, CINAHL and PEDro. The minimal prerequisites included in existing papers on such systematic reviews were: (a) Randomized Controlled Trial, (b) published in English (c) during the last ten years (2006 -2016). Studies were evaluated according to Jadad Score. Results: 12 studies were included. Selected papers showed an average Jadad score of 2,15. Conclusions: The review suggests that so far there is not a more effective treatment in comparison to others; moreover, available studies lack available samples and overall show to have a poor Jadad score. Nevertheless, a number of suggestive results emerged by the study carried out. Occupational therapists shall perform and report higher quality clinical studies as well as an increased evidence level with the aim to build up a trustworthy arsenal of evidence-based interventions for people with acute stroke.

Stroke survivors usually experience paralysis in one half of the body, i.e., hemiparesis, and the upper limbs are severely affected. Continuous monitoring of hemiparesis progression hours after the stroke attack involves manual observation of upper limb movements by medical experts in the hospital. Hence it is resource and time intensive, in addition to being prone to human errors and inter-rater variability. Wearable devices have found significance in automated continuous monitoring of neurological disorders like stroke. In this paper, we use accelerometer signals acquired using wrist-worn devices to analyze upper limb movements and identify hemiparesis in acute stroke patients, while they perform a set of proposed spontaneous and instructed movements. We propose novel measures of time (and frequency) domain coherence between accelerometer data from two arms at different lags (and frequency bands). These measures correlate well with the clinical gold standard of measurement of hemiparetic severity in stroke, the National Institutes of Health Stroke Scale (NIHSS). The study, undertaken on 32 acute stroke patients with varying levels of hemiparesis and 15 healthy controls, validates the use of short length (< 10 minutes) accelerometry data to identify hemiparesis through leave-one-subject-out cross-validation based hierarchical discriminant analysis. The results indicate that the proposed approach can distinguish between controls, moderate and severe hemiparesis with an average accuracy of 91%. [ABSTRACT FROM AUTHOR]

Introduction: Dysphagia can affect more than 50% of stroke patients in the acute phase. Aspiration pneumonia is a serious complication that can be prevented with dysphagia screening and assessment. Measurement of tongue elevation pressure is suggested to be a useful tool in aspiration risk screening. Objective: This study aimed to assess the diagnostic accuracy of maximum anterior tongue elevation strength (Pmax) in acute stroke care. Method: In this prospective study, data were collected in a neurology department (stroke center) where patients formed a consecutive case series. The sample consisted of thirty stroke patients who failed an initial dysphagia screening. Patients underwent anterior tongue elevation strength measurement (index test) during bedside dysphagia assessment by a speech-language pathologist and flexible endoscopic evaluation of swallowing (reference test) by an otorhinolaryngologist on the same day. Outcome variables (index values in kPa, reference values interpreted on the penetration-aspiration scale) were used for estimating measures of diagnostic accuracy in aspiration risk screening. Results: Ten patients aspirated on instrumental evaluation. At the cut-off point of ≤ 34 kPa the analysis showed 90% sensitivity, 35% specificity, 41% positive predictive value, and 88% negative predictive value. The area under the curve (AUC) for Pmax was AUC = 0.700 (95% CI [0.500–0.900]). Conclusion: Although individuals with low anterior tongue elevation strength tend to have a higher risk of aspiration, this variable alone is not capable of screening aspiration in acute stroke. In combination with a thorough noninstrumental bedside examination, it might have the potential to reduce the number of false positive cases. Further studies in this area would be worthwhile. [ABSTRACT FROM AUTHOR]

Several acute ischemic stroke mechanisms that cause lesion growth continue after treatment which is detrimental to long-term clinical outcome. The potential role of intravenous alteplase treatment (IVT), a standard in stroke care, in cessing the physiological processes causing post-treatment lesion development is understudied. We analyzed patients from the MR CLEAN-NO IV trial with good quality 24-hour and 1-week follow-up Non-Contrast CT scans. We delineated hypo- and hyper-dense regions on the scans as lesion. We performed univariable logistic and linear regression to estimate the influence of IVT on the presence (growth > 0 ml) and extent of late lesion growth. The association between late lesion growth and mRS was assessed using ordinal logistic regression. Interaction analysis was performed to evaluate the influence of IVT on this association. Of the 63/116 were randomized to included patients, IVT. Median growth was 8.4(−0.88–26) ml. IVT was not significantly associated with the presence (OR: 1.24 (0.57–2.74, p = 0.59) or extent (β = 5.1(−8.8–19), p = 0.47) of growth. Late lesion growth was associated with worse clinical outcome (aOR: 0.85(0.76–0.95), p < 0.01; per 10 ml). IVT did not influence this association (p = 0.18). We did not find evidence that IVT influences late lesion growth or the relationship between growth and worse clinical outcome. Therapies to reduce lesion development are necessary. [ABSTRACT FROM AUTHOR]

Purpose: To propose standardized and feasible imaging protocols for constructing artificial intelligence (AI) database in acute stroke by assessing the current practice at tertiary hospitals in South Korea and reviewing evolving AI models. Materials and Methods: A nationwide survey on acute stroke imaging protocols was conducted using an electronic questionnaire sent to 43 registered tertiary hospitals between April and May 2021. Imaging protocols for endovascular thrombectomy (EVT) in the early and late time windows and during follow-up were assessed. Clinical applications of AI techniques in stroke imaging and required sequences for developing AI models were reviewed. Standardized and feasible imaging protocols for data curation in acute stroke were proposed. Results: There was considerable heterogeneity in the imaging protocols for EVT candidates in the early and late time windows and posterior circulation stroke. Computed tomography (CT)-based protocols were adopted by 70% (30/43), and acquisition of noncontrast CT, CT angiography and CT perfusion in a single session was most commonly performed (47%, 14/30) with the preference of multiphase (70%, 21/30) over single phase CT angiography. More hospitals performed magnetic resonance imaging (MRI)-based protocols or additional MRI sequences in a late time window and posterior circulation stroke. Diffusion-weighted imaging (DWI) and fluid-attenuated inversion recovery (FLAIR) were most commonly performed MRI sequences with considerable variation in performing other MRI sequences. AI models for diagnostic purposes required noncontrast CT, CT angiography and DWI while FLAIR, dynamic susceptibility contrast perfusion, and T1-weighted imaging (T1WI) were additionally required for prognostic AI models. Conclusion: Given considerable heterogeneity in acute stroke imaging protocols at tertiary hospitals in South Korea, standardized and feasible imaging protocols are required for constructing AI database in acute stroke. The essential sequences may be noncontrast CT, DWI, CT/MR angiography and CT/MR perfusion while FLAIR and T1WI may be additionally required. [ABSTRACT FROM AUTHOR]

Previous reports revealed that middle cerebral artery occlusion (MCAO) models in rats were very diverse in nature, and experimental stroke of a more homogenous nature had not been previously documented. This paper aims to present our novel observations of experimental stroke in rats with similar MRI characteristics after MCAO. Immediately after MCAO, 19 rats were placed into a 4.7 T MRI scanner, and diffusion weighted imaging (DWI) of axial and coronal planes was repeated every 10 minutes up to post-occlusion 115 minutes. Apparent diffusion coefficient (ADC) values of the ischemic lesions were calculated and compared to those of the unaffected contra-lateral hemispheres. Successful MCAO was defined when the whole left MCA territory showed ADC abnormality on DWI. Percentage of hemispheric lesion volume (% HLV), relative ADC value (rADC), and relative DWI signal intensity (rDWI) were serially evaluated for quantitative analysis of ADC-derived lesion characteristics. Successful MCA territorial infarction was induced in nine rats (9/19, 47.4%). In quantitative analysis of ADC-derived lesion characteristics, lesion volumes of seven rats (group 1) were very similar, but larger than those of the other two rats (group 2): % HLV of initial MRI = 45.4 ± 2.5 / 19.1 ± 6.6. rADCs and rDWIs of group 1 showed similar patterns of temporal change, which was different from those of group 2. Using prospective diffusion MRI after MCAO in rats, we identified territorial hyperacute ischemic lesions with similar MRI characteristics. This observation would contribute to the establishment of more homogenous rodent models for ischemic stroke translational research. [ABSTRACT FROM AUTHOR]

Background: Tools to support clinical or patient decision-making in the treatment/management of a health condition are used in a range of clinical settings for numerous preference-sensitive healthcare decisions. Their impact in clinical practice is largely dependent on their quality across a range of domains. We critically analysed currently available tools to support decision making or patient understanding in the treatment of acute ischaemic stroke with intravenous thrombolysis, as an exemplar to provide clinicians/researchers with practical guidance on development, evaluation and implementation of such tools for other preference-sensitive treatment options/decisions in different clinical contexts. Methods: Tools were identified from bibliographic databases, Internet searches and a survey of UK and North American stroke networks. Two reviewers critically analysed tools to establish: information on benefits/risks of thrombolysis included in tools, and the methods used to convey probabilistic information (verbal descriptors, numerical and graphical); adherence to guidance on presenting outcome probabilities (IPDASi probabilities items) and information content (Picker Institute Checklist); readability (Fog Index); and the extent that tools had comprehensive development processes. Results: Nine tools of 26 identified included information on a full range of benefits/risks of thrombolysis. Verbal descriptors, frequencies and percentages were used to convey probabilistic information in 20, 19 and 18 tools respectively, whilst nine used graphical methods. Shortcomings in presentation of outcome probabilities (e.g. omitting outcomes without treatment) were identified. Patient information tools had an aggregate median Fog index score of 10. None of the tools had comprehensive development processes.Conclusions: Tools to support decision making or patient understanding in the treatment of acute stroke with thrombolysis have been sub-optimally developed. Development of tools should utilise mixed methods and strategies to meaningfully involve clinicians, patients and their relatives in an iterative design process; include evidence-based methods to augment interpretability of textual and probabilistic information (e.g. graphical displays showing natural frequencies) on the full range of outcome states associated with available options; and address patients with different levels of health literacy. Implementation of tools will be enhanced when mechanisms are in place to periodically assess the relevance of tools and where necessary, update the mode of delivery, form and information content. [ABSTRACT FROM AUTHOR]

Acute stroke is one of the major causes of death and disabilities. Since the 1980s many clinical studies have been conducted to evaluate neuroprotective approaches to treat this important brain vascular event. However, to date the only drug approved (recombinant tissue plasminogen activator [rtPA]) represents a thrombolytic, nonneuroprotective approach. An important neuroprotective strategy is based on erythropoietin (EPO). Exogenously administered EPO exhibits neuroprotective effects in numerous animal models, through the activation of anti-apoptotic, anti-oxidant and anti-inflammatory pathways as well as through the stimulation of angiogenic and neurogenic events. The capability of EPO to cross the blood–brain barrier after systemic administration and its effective therapeutic window are advantages for human acute stroke therapy. However, a multicenter stroke trial where recombinant human EPO (rhEPO) was combined with rtPA had negative outcomes. The present paper reviews the EPO neuroprotective strategy and its mechanisms in ischemic stroke and in other human nervous system diseases. [ABSTRACT FROM PUBLISHER]

Background: Palliative care should be integrated early into the care trajectories of people with life threatening illness such as stroke. However published guidance focuses primarily on the end of life, and there is a gap in the evidence about how the palliative care needs of acute stroke patients and families should be addressed. Synthesising data across a programme of related studies, this paper presents an explanatory framework for the integration of palliative and acute stroke care. Methods: Data from a survey (n=191) of patient-reported palliative care needs and interviews (n=53) exploring experiences with patients and family members were explored in group interviews with 29 staff from 3 United Kingdom stroke services. A realist approach to theory building was used, constructed around the mechanisms that characterise integration, their impacts, and mediating, contextual influences. Results: The framework includes two cognitive mechanisms (the legitimacy of palliative care and individual capacity), and behavioural mechanisms (engaging with family; the timing of intervention; working with complexity; and the recognition of dying) through which staff integrate palliative and stroke care. A range of clinical (whether patients are being 'actively treated', and prognostic uncertainty) and service (leadership, specialty status and neurological focus) factors appear to influence how palliative care needs are attended to. Conclusions: Our framework is the first, empirical explanation of the integration of palliative and acute stroke care. The specification in the framework of factors that mediate integration can inform service development to improve the outcomes and experiences of patients and families [ABSTRACT FROM AUTHOR]

Background: The Hunter area in New South Wales, Australia, is a well-defined geographical area with a population of 578,486 (2006). This paper presents trends from 1996 to 2008 for prospectively registered hospital admissions of adults aged 20 years and above with acute stroke. Method: Crude, age-standardised and age-specific stroke attack rates per 100,000 population and case fatality rates at standard time points were calculated. A medical record audit of stroke and stroke mimics was undertaken to determine discharge coding accuracy. Results: 9,796 acute stroke events were registered among 8,830 individuals at 14 public acute hospitals. Crude and age-standardised attack rates decreased consistently from 1996 to 2008. Crude rates fell from 184 to 176 per 100,000 population and age-standardised rates from 129 to 106 per 100,000 (attack rate reduction of 0.85% per year, p = 0.027; and 2.38% per year, p < 0.001, respectively). Annual attack rates for females were on average 27.70% (p < 0.001) lower than for males. Age-specific rates fell for each age bracket between 45 and 74 years. Case fatality rates remained constant. There was a 97.5% proportion of agreement between audit and coding. Conclusion: This study demonstrates falling stroke attack rates but stable case fatality over 13 years in a mixed urban and rural population of New South Wales, Australia. It suggests benefits from cardio- and cerebrovascular prevention strategies; however, it also indicates that stroke remains a major disease burden in this region. Copyright © 2010 S. Karger AG, Basel [ABSTRACT FROM AUTHOR]

To the present day, the first and most widespread diagnostic approach in the assessment of acute stroke remains CT scan. Its sensitivity is very high (nearly 100%) in detecting intracerebral hemorrhage in the acute period, but its capability of revealing ischemic injury in the very first hours from symptom onset is relatively poor. Since the efficacy of thrombolytic treatment in acute stroke has been suggested by the ECASS and NINDS rt-PA trials, functional neuroimaging able to distinguish potentially salvageable tissue from irreversibly injured areas has acquired primary importance. The possibility to correctly identify the tissue of the ischemic penumbra within the first hours from symptom onset is essential for correct patient selection for thrombolitic treatment. Different imaging strategies are available for the definition of perfusion deficits within the acute time window; among these are positron emission tomography (PET), single photon emission computed tomography (SPECT), Xenon CT (XeCT), dynamic CT perfusion imaging (CTP), diffusion weighted magnetic resonance imaging (DW-MRI), and perfusion weighted magnetic resonance imaging (PW-MRI). Though each technique has its advantages and limitations to present day functional MRI remains the most widespread imaging technique in the assessment of acute stroke being more accessible than both SPECT and PET, and capable of giving information on both perfusion and tissue functional status in a single imaging session. In this paper we discuss the role of functional neuroimaging in acute stroke. [ABSTRACT FROM AUTHOR]

Stroke mortality is extremely high in Central-Eastern European countries. The high rate of risk factors and differences in health care services might be among the factors resulting in high stroke morbidity and mortality in this region. As only few prospectively collected information are available from this region, we decided to evaluate some characteristics of stroke services in neurological departments of a Romanian, a Ukrainian and a Hungarian city in the framework of the Mureş–Uzhgorod–Debrecen comparative epidemiological study. We registered demographic data, the absence or presence of the most important risk factors, and clinical signs on admission and at discharge. We recorded the application of various diagnostic methods, stroke treatment and recommendations for secondary prevention. Follow-up is planned after 30 days and after 1 year. The paper summarizes the methodology of this prospective epidemiological study of stroke patients hospitalized in neurological departments in Târgu Mureş, Uzhgorod and Debrecen, three Central-Eastern European cities in Romania, Ukraine and Hungary, respectively. [ABSTRACT FROM AUTHOR]