Application of the Muse portable EEG system to aid in rapid diagnosis of stroke

AbstractObjectiveIn this pilot study, we investigated using portable electroencephalography (EEG) as a potential prehospital stroke diagnostic method.MethodsWe used a portable EEG system to record data from 25 participants, 16 had acute ischemic stroke events, and compared the results of age-matched controls that included stroke mimics. Delta/alpha ratio (DAR), (delta+theta)/(alpha+beta) ratio (DBATR) and pairwise-derived Brain Symmetry Index (pdBSI) were investigated, as well as accelerometer and gyroscope trends. We then made classification trees using TreeBagger to distinguish between different subgroups.ResultsDAR and DBATR showed an increase in ischemic stroke patients that correlates with stroke severity (p<0.01, partial η2 = 0.293; p<0.01, partial η2 = 0.234). pdBSI decreased in low frequencies and increased in high frequencies in patients who had a stroke (p<0.05, partial η2 = 0. 177). All quantitative EEG measures were significant between stroke patients and controls. Using classification trees, we were able to distinguish between subgroups of stroke patients and controls.ConclusionsThere are significant differences in DAR, DBATR, and pdBSI between patients with ischemic stroke when compared to controls; results relate to severity.SignificanceWith significant differences between patients with strokes and controls, we have shown the feasibility and utility for the Muse™ EEG system to aid in patient triage and diagnosis as an early detection tool.

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Predicting stroke severity with a 3-min recording from the Muse portable EEG system for rapid diagnosis of stroke

Scientific Reports ◽

10.1038/s41598-020-75379-w ◽

2020 ◽

Vol 10 (1) ◽

Author(s):

Cassandra M. Wilkinson ◽

Jennifer I. Burrell ◽

Jonathan W. P. Kuziek ◽

Sibi Thirunavukkarasu ◽

Brian H. Buck ◽

...

Keyword(s):

Ischemic Stroke ◽

Low Cost ◽

Minor Stroke ◽

Stroke Severity ◽

Stroke Patients ◽

Low Frequencies ◽

Severe Stroke ◽

High Frequencies ◽

Detection Tool ◽

Record Data

Abstract In this study, we demonstrated the use of low-cost portable electroencephalography (EEG) as a method for prehospital stroke diagnosis. We used a portable EEG system to record data from 25 participants, 16 had acute ischemic stroke events, and compared the results to age-matched controls that included stroke mimics. Delta/alpha ratio (DAR), (delta + theta)/(alpha + beta) ratio (DBATR) and pairwise-derived Brain Symmetry Index (pdBSI) were investigated, as well as head movement using the on-board accelerometer and gyroscope. We then used machine learning to distinguish between different subgroups. DAR and DBATR increased in ischemic stroke patients with increasing stroke severity (p = 0.0021, partial η2 = 0.293; p = 0.01, partial η2 = 0.234). Also, pdBSI decreased in low frequencies and increased in high frequencies in patients who had a stroke (p = 0.036, partial η2 = 0.177). Using classification trees, we were able to distinguish moderate to severe stroke patients and from minor stroke and controls, with a 63% sensitivity, 86% specificity and accuracy of 76%. There are significant differences in DAR, DBATR, and pdBSI between patients with ischemic stroke when compared to controls, and these effects scale with severity. We have shown the utility of a low-cost portable EEG system to aid in patient triage and diagnosis as an early detection tool.

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Prestroke statin use enhances collateralization in acute ischemic stroke patients

Restorative Neurology and Neuroscience ◽

10.3233/rnn-201012 ◽

2020 ◽

Vol 38 (4) ◽

pp. 311-321

Author(s):

Jiaying Zhu ◽

Mengmeng Ma ◽

Jinghuan Fang ◽

Jiajia Bao ◽

Shuju Dong ◽

...

Keyword(s):

Ischemic Stroke ◽

Middle Cerebral Artery ◽

Acute Ischemic Stroke ◽

Statin Therapy ◽

Cerebral Artery ◽

Functional Outcomes ◽

Collateral Circulation ◽

Stroke Severity ◽

Stroke Patients ◽

Statin Use

Background: Statin therapy has been shown to be effective in the prevention of ischemic stroke. In addition, recent studies have suggested that prior statin therapy could lower the initial stroke severity and improve stroke functional outcomes in the event of stroke. It was speculated that prestroke statin use may enhance collateral circulation and result in favorable functional outcomes. Objective: The aim of the study was to investigate the association of prestroke statin use with leptomeningeal collaterals and to determine the association of prestroke statin use with stroke severity and functional outcome in acute ischemic stroke patients. Methods: We prospectively and consecutively enrolled 239 acute ischemic stroke patients with acute infarction due to occlusion of the middle cerebral artery within 24 h in the neurology department of West China Hospital from May 2011 to April 2017. Computed tomographic angiography (CTA) imaging was performed for all patients to detect middle cerebral artery thrombus; regional leptomeningeal collateral score (rLMCS) was used to assess the degree of collateral circulation; the National Institutes of Health Stroke Scale (NIHSS) was used to measure stroke severity at admission; the modified Rankin scale (mRS) was used to measure outcome at 90 days; and premorbid medications were recorded. Univariate and multivariate analyses were performed. Results: Overall, 239 patients met the inclusion criteria. Fifty-four patients used statins, and 185 did not use statins before stroke onset. Prestroke statin use was independently associated with good collateral circulation (rLMCS > 10) (odds ratio [OR], 4.786; 95% confidence interval [CI], 1.195–19.171; P = 0.027). Prestroke statin use was not independently associated with lower stroke severity (NIHSS score≤14) (OR, 1.955; 95% CI, 0.657–5.816; p = 0.228), but prestroke statin use was independently associated with favorable outcome (mRS score≤2) (OR, 3.868; 95% CI, 1.325–11.289; P = 0.013). Conclusions: Our findings suggest that prestroke statin use was associated with good leptomeningeal collaterals and clinical outcomes in acute ischemic stroke (AIS) patients presenting with occlusion of the middle cerebral artery. However, clinical studies should be conducted to verify this claim.

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Association of Anemia with Stroke Severity in Acute Ischemic Stroke Patients

Cureus ◽

10.7759/cureus.2870 ◽

2018 ◽

Author(s):

Muhammad F Khan ◽

Ibrahim Shamael ◽

Qamar Zaman ◽

Asad Mahmood ◽

Maimoona Siddiqui

Keyword(s):

Ischemic Stroke ◽

Acute Ischemic Stroke ◽

Stroke Severity ◽

Stroke Patients

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CD163 as a Potential Biomarker of Monocyte Activation in Ischemic Stroke Patients

International Journal of Molecular Sciences ◽

10.3390/ijms22136712 ◽

2021 ◽

Vol 22 (13) ◽

pp. 6712

Author(s):

Rosaria Greco ◽

Chiara Demartini ◽

Anna Maria Zanaboni ◽

Elena Tumelero ◽

Alessandra Persico ◽

...

Keyword(s):

Ischemic Stroke ◽

Stroke Severity ◽

Mrna Levels ◽

Monocyte Count ◽

Stroke Patients ◽

Inflammatory Status ◽

Specific Distribution ◽

Cd163 Expression ◽

Potential Biomarker ◽

Complex Correlation

In ischemic stroke patients, a higher monocyte count is associated with disease severity and worse prognosis. The complex correlation between subset phenotypes and functions underscores the importance of clarifying the role of monocyte subpopulations. We examined the subtype-specific distribution of the CD163+ and CD80+ circulating monocytes and evaluated their association with the inflammatory status in 26 ischemic stroke patients and 16 healthy controls. An increased percentage of CD163+/CD16+ and CD163+/CD14++ events occurred 24 and 48 h after a stroke compared to the controls. CD163+ expression was more pronounced in CD16+ non-classical and intermediate monocytes, as compared to CD14+ classical subtype, 24 h after stroke. Conversely, the percentage of CD80+/CD16+ events was unaffected in patients; meanwhile, the percentage of CD80+/CD14+ events significantly increased only 24 h after stroke. Interleukin (IL)-1beta, TNF-alpha, and IL-4 mRNA levels were higher, while IL-10 mRNA levels were reduced in total monocytes from patients versus controls, at either 24 h or 48 h after stroke. The percentage of CD163+/CD16+ events 24 h after stroke was positively associated with NIHSS score and mRS at admission, suggesting that stroke severity and disability are relevant triggers for CD163+ expression in circulating CD16+ monocytes.

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Predictors of the functional outcome after thrombolysis in an Egyptian patients’ sample

The Egyptian Journal of Neurology Psychiatry and Neurosurgery ◽

10.1186/s41983-020-00261-5 ◽

2021 ◽

Vol 57 (1) ◽

Author(s):

H. M. Eldeeb ◽

D. H. Elsalamawy ◽

A. M. Elabd ◽

H. S. Abdelraheem

Keyword(s):

Ischemic Stroke ◽

Hospital Stay ◽

Functional Outcome ◽

Arterial Occlusion ◽

University Hospital ◽

Stroke Severity ◽

Stroke Patients ◽

Predicting Factors ◽

Egyptian Patients ◽

Cerebrovascular Stroke

Abstract Background About 6.2 million individuals worldwide and approximately 200 Egyptians/100,000 citizens have cerebrovascular stroke annually, and only less than 1% of stroke patients received intravenous (IV) thrombolysis in 2014. Outcome of the ischemic stroke after IV thrombolysis varies, and there is lack of data about the predicting factors that contributes to the outcome of ischemic strokes after IV thrombolysis in Egypt. Objective The aim of this work is to study the predictors of the functional outcome of ischemic cerebrovascular stroke after IV thrombolysis in Egyptian patients. Patients and methods This is a prospective study that includes acute ischemic stroke patients who received IV thrombolysis at the Alexandria University Hospital during the year from February 2017 to February 2018, and they were evaluated initially by Rapid Arterial Occlusion Evaluation (RACE) scale and followed-up serially for 6 months after thrombolysis using the National Institutes of Health Stroke Scale (NIHSS) and modified ranking score (mRS). Results Forty-five patients are included; 56% had favorable functional outcome (mRS 0–2) after 6 months, 68% had ≥ 4 points improvement in NIHSS after 6 months, and 13% had hemorrhagic conversion with 18% mortality rate. High initial RACE scale and long hospital stay are associated with poor functional outcome 6 months after thrombolysis. Conclusion Stroke severity demonstrated by high initial RACE and the duration of hospital stay are the two most significant predictors with an impact on the functional outcome of ischemic cerebrovascular stroke after thrombolysis.

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The Difference of Barthel Index Score Based on Stroke Severity, Weakness Side, and Onset of Physiotherapy in Ischemic Stroke Patients at Atma Jaya Hospital

Indonesian Journal of Physical Medicine & Rehabilitation ◽

10.36803/ijpmr.v6i02.157 ◽

2017 ◽

Vol 6 (02) ◽

pp. 15

Author(s):

Agustina Novita Putri Soegiarto ◽

Linda Suryakusuma ◽

Jane Pelealu

Keyword(s):

Ischemic Stroke ◽

Barthel Index ◽

Daily Living ◽

Index Score ◽

Stroke Severity ◽

Activity Of Daily Living ◽

Stroke Patients ◽

Barthel Index Score ◽

Cross Sectional ◽

Stroke Registry

Background: Stroke is the third cause of disability that can affect the Activity of Daily Living (ADL). Ischemicstroke had higher incidence compared to hemorrhagic strokes. Rehabilitation in the form of physiotherapy canreduce the level of ADL dependencies, that is be measured by Barthel Index Score. Stroke severity, weaknessside, and physiotherapy onset can be factors that influence the success of physiotherapy to reducing the levelof ADL dependencies.Methods:A descriptive analytic study with a cross-sectional design in ischemic stroke patients using secondarydata from the Stroke Registry and medical records at Atma Jaya Hospital for the period of January 2016 toDecember 2017. The data were analyzed using Chi-Square.Results: Study on 110 subjects, consisted of 62 men(56.4%), aged divided by under of 58 years, and above of 58years were 52(47.3%) and 58 (52.7%). While subjects divided by stroke severity, i.e. minor, moderate, moderateto severe, and severe; 44 (40%), 58 (52.7%), 5 (4.5%), and 3 (2.7%) respectively. There were 77 participants(70%) had right side weakness and 33 participants (30%) were left side weakness. The changes of Barthel Indexof ADL score, were 73 (66.4%) improvement, 6 (5.5%) deterioration, and 31 (28.2%) remained. The study hasshown relationship between severity of stroke (p=0.008), weakness side (p=0.000), and physiotherapy onset(p=0.039) with the changes of Barthel Indexscore after treatment.Conclusion: There was a relationship between stroke severity, the weakness side of stroke, and physiotherapyonset with the better result of Barthel Index of ADL score after the physiotherapy.Keywords: Activity of Daily Living (ADL), Barthel Index, ischemic stroke, physiotherapy onset, stroke severity,Weakness side

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Abstract TP148: The Hydration Influence on the Risk of Ischemic Stroke Outcomes (THIRST-EXPANSION STUDY)

Stroke ◽

10.1161/str.44.suppl_1.atp148 ◽

2013 ◽

Vol 44 (suppl_1) ◽

Author(s):

Mohammad Moussavi ◽

Gustavo Rodriguez ◽

Joseph Alario ◽

Ravjot Sodhi ◽

Aaron Nizam ◽

...

Keyword(s):

Ischemic Stroke ◽

Negative Impact ◽

Serum Osmolality ◽

Hydration Status ◽

Stroke Severity ◽

Past Study ◽

Stroke Patients ◽

Stroke Outcomes ◽

Significant Difference ◽

The Mean

Introduction: Extensive studies have not been done in patients presenting with ischemic stroke regarding hydration status. It is unclear whether all of the elements of hydration status affect disability on discharge. Our past study suggests that high serum osmolality has a negative impact on ischemic stroke severity. This continuation of our prior study aims to test the effect of all laboratory elements of dehydration on severity and outcome of ischemic stroke patients. Methods: We conducted a retrospective analysis of ischemic stroke patients admitted between 2004 and 2009 at a community teaching hospital. Serum BUN/Creatinine and serum osmolality (sOsm) was calculated at initial presentation. sOSm, BUN/Cr, hematocrit and bicarbonate levels were analyzed for association with NIHSS and mRS. Patients were divided into two groups by sOsm as follows: (1) sOsm < 295, (2) sOsm ≥ 295; and two groups by BUN/Cr as follows: (3) BUN/Cr < 20, (4) BUN/Cr ≥ 20. Discharge mRS score was compared between (1) and (2); and (3) and (4) to determine the effect of sOsm and BUN/Cr on stroke outcomes. All data was analyzed using SPSS software version 20. Results: Of 1350 patients, 543 (mean age = 72.5 +/-14.2, 56% female) were included. There was a significant difference between the mean admission NIHSS in (1) 8.57, n = 222 and (2) 7.09, n = 319, p < .05 and between (3) 8.90, n = 219 and (4) 6.87, n = 322, p < .05. There was a significant difference in the mean mRS score between (1) 2.92, n = 222 and (2) 2.54, n = 317, p < .05, and (3) 2.92, n = 218 and (4) 2.56, n = 321, p < .05. The same results were found when comparing discharge sOsm values to predict patient outcome. Discharge sOsm correlated with mRS (r = .147, p < .05). Initial BUN/Cr correlated with NIHSS (r = .128, p < .05) and mRS (r = .107, p < .05) and final BUN/Cr with mRS (r = .161, p < .001). Bicarbonate levels at admission correlated with NIHSS at admission (r = -0.134), p < 0.05. Hematocrit levels at discharge correlated with mRS (r= -0.183), p <0.001. Conclusion: Our study suggests that patients with BUN/Cr and sOsm above normal levels at admission and dishcarge have worse outcome at discharge. We also found a correlation between other laboratory variables of dehydration status, namely hematocrit levels and outcome. A future prospective randomized study is warranted.

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Abstract TP160: Predicting Bone Fracture After Stroke—The Fracture Risk After Ischemic Stroke (FRAC-Stroke) Score

Stroke ◽

10.1161/str.48.suppl_1.tp160 ◽

2017 ◽

Vol 48 (suppl_1) ◽

Author(s):

Eric E Smith ◽

Jiming Fang ◽

Shabbir M Alibhai ◽

Peter M Cram ◽

Angela M Cheung ◽

...

Keyword(s):

Ischemic Stroke ◽

Fracture Risk ◽

Risk Score ◽

Cumulative Incidence ◽

Population Based ◽

World Health ◽

Stroke Severity ◽

Stroke Patients ◽

One Year ◽

Low Trauma Fracture

Background: Risk for low trauma fracture is increased by >30% after ischemic stroke. Additionally, in the IRIS trial pioglitazone therapy prevented ischemic stroke but increased fracture risk. We derived a risk score to predict risk of fracture one year after ischemic stroke. Methods: The Fracture Risk after Ischemic Stroke (FRAC-Stroke) Score was derived in 20,435 ischemic stroke patients from the Ontario Stroke Registry discharged from 2003-2012, using Fine-Gray competing risk regression. Candidate variables were medical conditions included in the validated World Health Organization FRAX risk score complemented by variables related to stroke severity. Registry patients were linked to population-based Ontario health administrative data to identify low trauma fractures (defined as any fracture of the femur, forearm, humerus, pelvis or vertebrae, excluding fractures resulting from trauma, motor vehicle accidents, falls from a height or in people with active cancer). The score was externally validated in 13,698 other ischemic stroke patients in the population-based Ontario stroke audit (2002-2012). Results: Mean age was 72; 42% were women. Low trauma fracture occurred within 1 year of discharge in 741/20435 (3.6%); cumulative incidence increased linearly throughout follow-up. Age, discharge modified Rankin score (mRS), and history of arthritis, osteoporosis, falls and previous fracture contributed significantly to the model. Model discrimination was good (c statistic 0.72). Including discharge mRS significantly improved discrimination (relative integrated discrimination index 8.7%). Fracture risk was highest in patients with mRS 3 and 4 but lowest in bedbound patients (mRS 5). From the lowest to the highest FRAC-Stroke quintile the cumulative incidence of 1-year low trauma fracture increased from 1% to 9%. Predicted and observed rates of fracture were similar in the external validation cohort. Conclusion: The FRAC-Stroke score allows the clinician to identify ischemic stroke patients at higher risk of low trauma fracture within one year. This information might be used to target patients for early bone densitometry screening to diagnose and manage osteoporosis, and to estimate baseline risk prior to starting pioglitazone therapy.

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Abstract TP19: Charlson Comorbidity Index Predicts Mortality and Functional Outcome in Acute Ischemic Stroke Patients Treated With Mechanical Thrombectomy

Stroke ◽

10.1161/str.47.suppl_1.tp19 ◽

2016 ◽

Vol 47 (suppl_1) ◽

Author(s):

Daniela Samaniego ◽

Maria Hernandez-Perez ◽

Anna Planas ◽

Lorena Martin ◽

Laura Dorado ◽

...

Keyword(s):

Ischemic Stroke ◽

Functional Outcome ◽

Charlson Comorbidity Index ◽

Mechanical Thrombectomy ◽

Stroke Severity ◽

Stroke Patients ◽

Poor Functional Outcome ◽

Arterial Revascularization ◽

Comorbidity Index ◽

High Comorbidity

Introduction: Despite mechanical thrombectomy has achieved a dramatic improvement on ischemic stroke prognosis, up to 50% of patients treated with this approach do not have good functional outcome. Besides age and baseline infarct core, comorbidity might play a role in stroke prognosis. We aim to study the capacity of Charlson comorbidity index (CCI) in predicting mortality and functional outcome in acute ischemic stroke patients who underwent mechanical thrombectomy. Methods: We studied 228 consecutive patients (59% male, mean age 65y) with acute anterior circulation arterial occlusion treated with stent retrievers between May 2009 and March 2015. Demographical data, stroke severity, ASPECTS score at baseline and medical conditions included in the CCI were collected and CCI score was calculated retrospectively. We considered low comorbidity if CCI score was <2 and high comorbidity if CCI score was ≥2. Complete arterial revascularization was defined as a TICI ≥2b on final angiographic run. Good functional outcome was defined as a modified Rankin score ≤2 at 90 days. Results: The CCI was 0 in 47% of patients, 1 in 23%, 2 in 15%, 3 in 10% and ≥4 in 5%. CCI of 2 or more was associated with poor functional outcome (70.6% vs 50%, p = 0.004) and mortality (33.8% vs. 11.7%, p <0.001) compared to patients with low CCI. In a logistic regression adjusted by stroke severity, age, ASPECTS score at baseline and arterial revascularization, high comorbidity remained as an independent predictor of poor outcome (OR 2.9; 95% CI 1.4-5.8) and mortality (OR 4.6, 95% CI 2.0-10.3). Conclusions: High comorbidity assessed by Charlson Comorbidity Index is associated with poor functional outcome and mortality in acute stroke patients treated with mechanical thrombectomy.

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