Dysautonomia and activity in the early stroke recovery period

Maintaining cerebral perfusion in the early stages of recovery after stroke is paramount. Autoregulatory function may be impaired during this period leaving cerebral perfusion directly reliant on intravascular volume and blood pressure (BP) with increased risk for expanding cerebral infarction during periods of low BP and hemorrhagic transformation during BP elevations. We suspected that dysautonomia is common during the acute period related to both pre-existing vascular risk factors and potentially independent of such conditions. Thus, we sought to understand the state of the science specific to dysautonomia and acute stroke. The scoping review search included multiple databases and key terms related to acute stroke and dysautonomia. The team employed a rigorous review process to identify, evaluate, and summarize relevant literature. We additionally summarized common clinical approaches used to detect dysautonomia at the bedside. The purpose of this scoping review is to understand the state of the science for the identification, treatment, and impact of dysautonomia on acute stroke patient outcomes. There is a high prevalence of dysautonomia among persons with stroke, though there is significant variability in the type of measures and definitions used to diagnose dysautonomia. While dysautonomia appears to be associated with poor functional outcome and post-stroke complications, there is a paucity of high-quality evidence, and generalizability is limited by heterogenous approaches to these studies. There is a need to establish common definitions, standard measurement tools, and a roadmap for incorporating these measures into clinical practice so that larger studies can be conducted.

Fever, Cognitive Decline, and Multifocal T2 Hyperintensities on Brain MRI: A Case Report of Cytokine Release Syndrome

Cytokine release syndrome (CRS) is a systemic inflammatory response characterized by fever, constitutional symptoms, and multiorgan dysfunction. While most commonly associated with immunotherapy, CRS can also be incited by infections or drugs. This case details the presentation and evaluation of a 71-year-old woman with a history of primary myelofibrosis and breast cancer who presented with acute onset of altered mental status. Initial vital signs were notable for severe hypertension, tachycardia, and fever. The patient was alert and oriented only to self, with little verbal output, and spontaneously moving all extremities. The patient had a submandibular gland abscess that had been diagnosed prior to presentation via a computed tomography scan of the neck. A comprehensive analysis, including blood tests, cerebrospinal fluid (CSF) analysis, electroencephalogram (EEG), and neuroimaging, was performed. Severe leukocytosis was noted and brain MRI demonstrated scattered areas of diffusion restriction and diffuse T2 white matter hyperintensities. Serial imaging demonstrated the progression of T2 hyperintensities. Ultimately, CRS was the most likely diagnosis. In this case, the inciting event was likely an infectious etiology, suspected to be the submandibular gland abscess that was present at the time of admission. It is vital to have a high index of suspicion for CRS in patients with recent infection, drug exposure, or immune dysregulation.

Nonpharmacological Treatments for Hospitalized Patients with Stroke: A Nuanced Approach to Prescribing Early Activity

Stroke remains a leading cause of adult disability. To date, hyperacute revascularization procedures reach 5-10% of stroke patients even in high resource health systems. There is a limited time window for brain repair after stroke, and therefore, the activities such as prescribed exercise in the earliest period will likely have long-term significant consequences. Clinicians who provide care for hospitalized stroke patients make treatment decisions specific to activity often without guidelines to direct these prescriptions. This requires a balanced understanding of the available evidence for early post-stroke exercise and physiological principles after stroke that drive the safety of prescribed exercise. Here, we provide a summary of these relevant concepts, identify gaps, and recommend an approach to prescribing safe and meaningful activity for all patients with stroke. The population of thrombectomy-eligible stroke patients can be used as the exemplar for conceptualization.

Development and Implementation of a New Model of Care for Patients With Stroke, Acute Hospital Rehabilitation Intensive SErvices: Leveraging a Multidisciplinary Rehabilitation Team

ABSTRACT

The optimal timing and intensity of early rehabilitation remain uncertain. The literature has stated that too early high-intensity mobility within 24 hours can result in poor outcomes as compared with the 24- to 48-hour poststroke (Stroke 2012;43:2389-94. Stroke 2004;35:1005-9). However, few studies have shown that mobilizing patients a few times per day can have positive results (Stroke 2004;35:1005-9. Cerebrovasc Dis 2010;29:352-60). In addition to mobility impairments, many patients after stroke have dysphagia, aphasia, and cognitive-linguistic deficits. To date, there is limited literature on early rehabilitation in these areas. Here, we describe a program of enhanced rehabilitation in the acute care hospital. In this enhanced model of care, our team delivers up to six sessions of therapy per day focused on the patient's deficits. A patient can receive up to two sessions of each discipline daily to include physical therapy, occupational therapy, and speech language pathology. The model emphasizes team collaboration between therapy disciplines, physiatry, nursing, and neurology accomplished through a daily therapy schedule, rehabilitation huddle, and direct communication before and after therapy sessions. With this model, we aim to enhance coordination of care resulting in improved patient satisfaction and, ultimately, recovery.

Socialize, Eat More, and Feel Better: Communal Eating in Acute Neurological Care

OBJECTIVE

Stroke commonly leads to feelings of isolation and loneliness, especially during the hospital period. The aim of the Communal Eating program was to support patient well-being through introducing opportunities for patients to eat lunch together.

DESIGN

Patients admitted to the Brain Rescue Unit who were identified as appropriate by their attending physicians, nurses, or other clinicians were recruited to attend communal lunch. Their mood, quality of life, loneliness, communication, swallowing safety, and eating behavior were examined.

RESULTS

Those who attended two or more sessions tended to have been lonelier and more psychosocially impaired at baseline. Patients who had one or fewer lunch showed no significant differences from baseline to posthospitalization on any measure. However, for those who ate two or more lunches, changes in loneliness and quality of life trended toward improvement. There was scant evidence of changes to communication or eating habits.

CONCLUSION

Implementing a communal eating program in the acute hospital setting was very feasible and widely supported by patients, families, and staff. The results thus far show modest trends toward fulfilling the goal of supporting emotional well-being, while potentially supporting increased intake and, importantly, do not evidence any measurable harm.

Biological Sex Differences in Risk Factors and Outcomes Among Hospitalized Adults With Stroke in Lusaka, Zambia

Background:

We investigated sex differences in clinical characteristics and outcomes among hospitalized adults with stroke in Zambia.

Methods:

We retrospectively collected information for 324 consecutively hospitalized adults with stroke on the neurology service at the University Teaching Hospital in Lusaka, Zambia between October 2018 - March 2019. Stroke characteristics were then compared by biological sex.

Results:

Females constituted 62% (n=200) of the cohort, were older (61+19 vs 57+16 years, p=0.06), had fewer hemorrhagic stroke than males (22% vs 37%, p=0.001), and higher rates of hypertension (84% vs 74%, p=0.04), diabetes (19% vs 13%, p=0.04), heart disease (38% vs. 27%, p=0.04) and prior history of stroke (26% vs. 14%, p=0.01). Males had higher rates of alcohol (33% vs. 4%, p<0.001) and tobacco (19% vs. 2%, p<0.001) use. Females were less likely to have neuroimaging completed during their hospitalization (82% vs 94%, p=0.002) and had higher 90-day post-discharge mortality was (28% vs 10%, p=0.002) independent of age and stroke subtype (OR 2.48, 95% CI 1.1-5.58, p=0.03).

Discussion:

Females in this Zambian stroke cohort had a higher prevalence of vascular risk factors but were less likely to have neuroimaging completed. Post-discharge mortality was markedly higher among females even after adjusting for age and stroke subtype. Our data highlight the need for future studies of social and socioeconomic factors that may influence stroke-related outcomes.

Stroke Outcome Related to Initial Volume Status and Diuretic Use

Background We hypothesized that stroke outcome is related to multiple baseline hydration-related factors including volume contracted state (VCS) and diuretic use. Methods and Results We analyzed a prospective cohort of subjects with ischemic stroke <24 hours of onset enrolled in acute treatment trials within VISTA (Virtual International Stroke Trials Archive). A VCS was defined based on blood urea nitrogen-to-creatinine ratio. The primary end point was modified Rankin Scale score at 90 days. Primary analysis used generalized ordinal logistic regression over the mRS range, adjusted for Totaled Health Risks in Vascular Events score, onset-to-enrollment time, and thrombolytic use. Of 5971 eligible patients with stroke, 42% were taking diuretics at the time of hospitalization, and 44% were in a VCS. Patients in a VCS were older, had more vascular risk factors, were more likely taking diuretics, and had more severe strokes. Diuretic use was associated with both reduced chance of achieving a good functional outcome (odds ratio [OR], 0.57 [95% CI, 0.52-0.63]) and increased mortality at 90 days (OR, 2.30 [95% CI, 2.04-2.61]). VCS was associated with greater mortality 90 days after stroke (OR, 1.53 [95% CI, 1.33-1.76]). There was no evidence of effect modification among the 3 exposures of VCS, diuretic use, or hypokalemia in relation to outcome. Conclusions A VCS at the time of hospitalization was associated with more severe stroke and odds of death but not associated with worse functional outcome when accounting for relevant characteristics. Diuretic use and low serum potassium at the time of stroke onset were associated with worse outcome and may be worthy of further investigation.

Noninvasive cardiac output monitor to quantify hydration status in ischemic stroke patients: A feasibility study

BACKGROUND

Individuals who are dehydrated, volume contracted or both at the time of hospitalization for acute ischemic stroke have worse clinical outcomes than do individuals with optimal volume status. Currently, there is no gold standard method for measuring hydration status, except indirect markers of a volume contracted state (VCS) including elevated blood urea nitrogen (BUN)/creatinine ratio. We sought to test the feasibility and acceptability of a non-invasive cardiac output monitor (NICOM) for the measurement of hydration status in a group of hospitalized ischemic stroke patients, and explore the relationship with a common indirect laboratory-based measure of VCS.

METHODS

We performed a prospective observational feasibility study of hospitalized acute ischemic stroke patients. We collected hemodynamic parameters using the NICOM device before and after fluid auto-bolus via passive leg raise and BUN/creatinine ratio. Successful acquisition of relevant hemodynamic data was the primary objective of this study. We explored agreement between the NICOM results and BUN/creatinine ratio using Cohen's kappa statistic.

RESULTS

Thirty patients hospitalized with acute ischemic stroke were enrolled. We found that 29/30 patients tolerated assessment with NICOM. Hemodynamic data were collected in all 30 patients. Data capture took an average of 10 min(SD ± 112 s). Agreement between NICOM and BUN/creatinine ratio was 70%; (expected agreement 51%; kappa 0.38). Agreement was stronger in the cohort without history of diabetes (81% agreement, kappa 0.61).

CONCLUSIONS

NICOM assessment was feasible in hospitalized stroke patients. The identification of an objective, real-time measure of hydration status would be clinically useful, and could allow precise, goal-directed care.

Providers' Perceptions of Neurology Care Delivered Through Telemedicine Technology

Background: The COVID-19 pandemic and subsequent acceleration of telemedicine usage allowed many neurologists to trial telemedicine for neurological care. The purpose of this study is to explore neurology providers' experiences with delivering telemedicine care during the COVID-19 pandemic. Methods: Semistructured video interviews were conducted with 27 neurology providers who practice at a single, urban academic center. Interviews were transcribed and analyzed for content and themes. Results: Five major themes were identified: virtual examination subspecialty differences, tips and tricks for the virtual examination, improved infrastructure needs, future technologies that could support the virtual examination, and preferences for the postpandemic telemedicine protocol. Subspecialists who described their visits as more focused on behavioral examination and obtaining patient history reported fewer limitations with delivering neurological care through telemedicine platforms. Conclusions: The implementation of a telemedicine system should reflect the needs of each neurology subspecialty. Funding is needed to improve logistical infrastructure for health providers' telemedicine visits, such as technical and administrative assistance, as well as creation and testing of technologies to support physical examination in the virtual environment.

Predictors of in-hospital and 90-day post-discharge stroke mortality in Lusaka, Zambia

BACKGROUND

Factors associated with stroke mortality are understudied in sub-Saharan Africa but have implications for designing interventions that improve stroke outcomes. We investigated predictors of in-hospital and 90-day post-discharge stroke mortality in Lusaka, Zambia.

METHODS

Data from consecutive adults admitted with stroke at University Teaching Hospital in Lusaka, Zambia between October 2018 and March 2019 were retrospectively reviewed for clinical in-hospital outcomes. Vital status at 90-days post-discharge was determined through phone calls. Factors associated with stroke mortality were included in multivariable logistic regression models utilizing multiple imputation analysis to determine independent predictors of in-hospital and 90-days post-discharge mortality.

RESULTS

In-hospital mortality was 24%, and 90-day post-discharge mortality was 22% among those who survived hospitalization. Hemorrhagic and unknown strokes, ICU care, seizures, and aspiration pneumonia were significantly associated with in-hospital mortality. Among these, hemorrhagic stroke (OR 2.88, 95% CI 1.27-6.53, p = 0.01) and seizures (OR 29.5, 95% CI 2.14-406, p = 0.01) remained independent predictors of in-hospital mortality in multivariable analyses. Ninety-day post-discharge mortality was significantly associated with older age, previous stroke, atrial fibrillation, and aspiration pneumonia, but only older age (OR 1.04, 95% CI 1.01-1.06, p = 0.007) and aspiration pneumonia (OR 3.93, 95% CI 1.30-11.88, p = 0.02) remained independently associated with 90-day mortality in multivariable analyses.

CONCLUSION

This Zambian stroke cohort had high in-hospital and 90-day post-discharge mortality that were associated with several in-hospital complications. Our data indicate the need for improvement in both acute stroke care and post-stroke systems of care to improve stroke outcomes in Zambia.

The Impact of Mean Arterial Pressure and Volume Contraction in With Acute Ischemic Stroke

Background and Purpose

Hydration at the time of stroke may impact functional outcomes. We sought to investigate the relationship between blood pressure, hydration status, and stroke severity in patients with acute ischemic stroke (AIS).

Methods

We evaluated hydration status, determined by blood urea nitrogen (BUN)/creatinine ratio, in consecutive patients with AIS from a single comprehensive stroke center. Baseline mean arterial pressure (MAP) was analyzed using a linear spline with a knot at 90 mmHg. Baseline stroke severity was defined based on admission NIH Stroke Scale scores (NIHSSS) and MRI diffusion-weighted imaging.

Results

Among 108 eligible subjects, 55 (51%) presented in a volume contracted state. In adjusted models, in the total sample, for every 10 mmHg higher MAP up to 90 mmHg, NIHSSS was 2.8 points lower (p = 0.053), without further statistically significant association between MAP above 90 and NIHSSS. This relationship was entirely driven by the individuals in a volume contracted state: MAP was not associated with NIHSSS in individuals who were euvolemic. For individuals in a volume contracted state, each 10 mmHg higher MAP, up to 90 mmHg, was associated with 6.9 points lower NIHSSS (95% CI −11.1, −2.6). MAP values above 90 mmHg were not related to NIHSSS in either dehydrated or euvolemic patients.

Conclusions

Lower MAP contributes to more severe stroke in patients who are volume contracted, but not those who are euvolemic, suggesting that hydration status and blood pressure may jointly contribute to the outcome. Hydration status should be considered when setting blood pressure goals for patients with AIS.

Aspiration Pneumonia in Adults Hospitalized With Stroke at a Large Academic Hospital in Zambia

Background and Objectives

Preventing complications of stroke such as poststroke aspiration pneumonia (PSAP) may improve stroke outcomes in resource-limited settings. We investigated the incidence and associated mortality of PSAP in Zambia.

Methods

We conducted a prospective cohort study of adults with stroke at University Teaching Hospital (Lusaka, Zambia) between December 2019 and March 2020. NIH Stroke Scale, Glasgow Coma Scale, and Modified Rankin Scale scores and 9 indicators of possible PSAP were collected serially over each participant's admission. PSAP was defined as ≥4 indicators present, and possible PSAP as 2%-3% present. T tests and χ² tests were used to compare clinical parameters across PSAP groups. Logistic regression was used to assess the relative effects of age, sex, PSAP status, and initial stroke severity on inpatient mortality.

Results

We enrolled 125 participants. Mean age was 60 ± 16 years, 61% were female, 55% of strokes were ischemic, and the baseline NIH Stroke Scale score was 19.7 ± 8.7. Thirty-eight (30%) had PSAP, and 32 (26%) had possible PSAP. PSAP was associated with older age and more adverse stroke severity scores. Fifty-nine percent of participants with PSAP died compared with 39% with possible PSAP and 8% with no PSAP. PSAP status independently predicted inpatient mortality after controlling for age, sex, and initial stroke severity. Swallow screening was not performed for any participant.

Discussion

PSAP is common and life threatening in Zambia, especially among older participants with severe stroke presentations. PSAP was associated with significantly increased mortality independent of initial stroke severity, suggesting that interventions to mitigate PSAP may improve stroke outcomes in Zambia and other resource-limited settings.

Acute Viral Illnesses and Ischemic Stroke: Pathophysiological Considerations in the Era of the COVID-19 Pandemic

The severe acute respiratory syndrome coronavirus 2 or coronavirus disease 2019 (COVID-19) pandemic has raised concerns about the correlation with this viral illness and increased risk of stroke. Although it is too early in the pandemic to know the strength of the association between COVID-19 and stroke, it is an opportune time to review the relationship between acute viral illnesses and stroke. Here, we summarize pathophysiological principles and available literature to guide understanding of how viruses may contribute to ischemic stroke. After a review of inflammatory mechanisms, we summarize relevant pathophysiological principles of vasculopathy, hypercoagulability, and hemodynamic instability. We will end by discussing mechanisms by which several well-known viruses may cause stroke in an effort to inform our understanding of the relationship between COVID-19 and stroke.

Transcranial Doppler in Acute COVID-19 Infection: Unexpected Associations

BACKGROUND AND PURPOSE

Stroke may complicate coronavirus disease 2019 (COVID-19) infection based on clinical hypercoagulability. We investigated whether transcranial Doppler ultrasound has utility for identifying microemboli and clinically relevant cerebral blood flow velocities (CBFVs) in COVID-19.

METHODS

We performed transcranial Doppler for a consecutive series of patients with confirmed or suspected COVID-19 infection admitted to 2 intensive care units at a large academic center including evaluation for microembolic signals. Variables specific to hypercoagulability and blood flow including transthoracic echocardiography were analyzed as a part of routine care.

RESULTS

Twenty-six patients were included in this analysis, 16 with confirmed COVID-19 infection. Of those, 2 had acute ischemic stroke secondary to large vessel occlusion. Ten non-COVID stroke patients were included for comparison. Two COVID-negative patients had severe acute respiratory distress syndrome and stroke due to large vessel occlusion. In patients with COVID-19, relatively low CBFVs were observed diffusely at median hospital day 4 (interquartile range, 3-9) despite low hematocrit (29.5% [25.7%-31.6%]); CBFVs in comparable COVID-negative stroke patients were significantly higher compared with COVID-positive stroke patients. Microembolic signals were not detected in any patient. Median left ventricular ejection fraction was 60% (interquartile range, 60%-65%). CBFVs were correlated with arterial oxygen content, and C-reactive protein (Spearman ρ=0.28 [P=0.04]; 0.58 [P<0.001], respectively) but not with left ventricular ejection fraction (ρ=-0.18; P=0.42).

CONCLUSIONS

In this cohort of critically ill patients with COVID-19 infection, we observed lower than expected CBFVs in setting of low arterial oxygen content and low hematocrit but not associated with suppression of cardiac output.

Physiological Responses to In-Bed Cycle Ergometry Treatment in Intensive Care Unit Patients with External Ventricular Drainage

Purpose

Evidence suggests that early physical activity can be accomplished safely in the neurocritical care unit (NCCU); however, many NCCU patients are often maintained in a state of inactivity due to impaired consciousness, sensorimotor deficits, and concerns for intracranial pressure elevation or cerebral hypoperfusion in the setting of autoregulatory failure. Structured in-bed mobility interventions have been proposed to prevent sequelae of complete immobility in such patients, yet the feasibility and safety of these interventions is unknown. We studied neurological and hemodynamic changes before and after cycle ergometry (CE) in a subset of NCCU patients with external ventricular drains (EVDs).

Methods

Patients admitted to the NCCU who had an EVD placed for cerebrospinal fluid drainage and intracranial pressure (ICP) monitoring underwent supine CE therapy with passive and active cycling settings. Neurologic status, ICP and hemodynamic parameters were monitored before and after each CE session.

Results

Twenty-seven patients successfully underwent in-bed CE in the NCCU. No clinically significant changes were recorded in neurologic or in physiological parameters before or after CE. There were no device dislodgements or other adverse effects requiring cessation of a CE session.

Conclusion

These data suggest that supine CE in a heterogeneous cohort of neurocritical care patients with EVDs is safe and tolerable. Larger prospective studies are needed to determine the efficacy and optimal dose and timing of supine CE in neurocritical care patients.

Risk factors and outcomes of hospitalized stroke patients in Lusaka, Zambia

BACKGROUND

Limited data exists about stroke risk factors and outcomes in sub-Saharan African countries, including Zambia. We aim to fill this gap by describing features of hospitalized stroke patients at University Teaching Hospital (UTH), the national referral hospital in Lusaka, Zambia.

METHODS

We conducted a retrospective study of consecutive adults with stroke admitted to UTH's inpatient neurology service from October 2018 to March 2019. Strokes were classified as ischemic or hemorrhagic based on CT scan results and unknown if CT scan was not obtained. Chi-square analyses and t-tests were used to compare characteristics between cohorts with differing stroke subtypes.

RESULTS

Adults with stroke constituted 43% (n = 324) of all neurological admissions, had an average age of 60 ± 18 years, and 62% of the cohort was female. Stroke subtypes were 58% ischemic, 28% hemorrhagic, and 14% unknown. Hypertension was present in 80% of all strokes and was significantly associated with hemorrhagic stroke (p = 0.03). HIV was present in 18% of all strokes and did not significantly differ by stroke subtype. Diabetes (16%), heart disease (34%), atrial fibrillation (9%), and past medical history of stroke (22%) were all significantly more common in patients with ischemic stroke (p < 0.05). In-hospital mortality was 24% overall and highest among individuals with hemorrhagic strokes (33%, p = 0.005).

CONCLUSIONS

This Zambian stroke cohort is notable for its young age, significant HIV burden, high in-hospital mortality, and high rates of uncontrolled hypertension. Our results demonstrate Zambia's substantial stroke burden, significant contribution of HIV to stroke, and the need to improve primary stroke prevention.

Abstract P171: JSTTEP: An Interprofessional Intervention to Reduce Early Risk After Hospitalization for Stroke

Background: The transition period from hospital to home is a highly vulnerable time for patients after stroke. COVID-19 restrictions have exacerbated safety concerns, stressed the health care system, and put patients at high risk after discharge. Here we describe pilot results from the Joint Stroke Transitional Technology-Enhanced Program (JSTTEP) designed to reduce post-stroke complications, avoid hospital readmission, and enhance recovery.

Methods: JSTTEP is a novel, interprofessional program for patients discharged from the Johns Hopkins Comprehensive Stroke Center. In the first weeks after hospital discharge, stroke patients complete a series of multidisciplinary telemedicine visits to (1) reduce the risks of adverse events in the transition from hospital to home, and (2) develop a plan to facilitate a full recovery. The first joint visit is with stroke neurology and physical therapy for risk mitigation, and the second is with physiatry and occupational therapy for a recovery plan. Patients and caregivers participate in an interactive, online group education session covering topics about vascular risk factor modification, nutrition, exercise, fall prevention, and self-management skills.

Results: In the first 4 months of the program, 50 patients were enrolled. Average age was 61 years; 26/50 (52%) were women, 23/50 (46%) were African American, and mean baseline NIHSS was 5.4. Of those 45/50 (90%) completed their visit, with 4/50 (8%) requiring conversion from video to phone visit. Unexpected 30-day hospital readmission rate was 3/50 (6%), one of whom was readmitted due to neurological issues identified during the JSTTEP appointment. Interpreter services were utilized for 5 completed video visits (Arabic, Mandarin, Spanish, Twi, Urdu). Patients reported the ability to include family members remotely in the visit as an advantage.

Conclusions: The data demonstrate the feasibility and potential benefit of an interprofessional stroke telemedicine program designed to enhance post-stroke recovery. JSTTEP increased access to post-hospital care and reduced risks for adverse outcomes. The ongoing benefits and scaling of such a clinic will rely on permanent legislative and insurance changes to support such a care model.

Aligning community-engaged research competencies with online training resources across the Clinical and Translational Science Award Consortium

INTRODUCTION

The extent to which Clinical and Translational Science Award (CTSA) programs offer publicly accessible online resources for training in community-engaged research (CEnR) core competencies is unknown. This study cataloged publicly accessible online CEnR resources from CTSAs and mapped resources to CEnR core competency domains.

METHODS

Following a search and review of the current literature regarding CEnR competencies, CEnR core competency domains were identified and defined. A systematic review of publicly accessible online CEnR resources from all 64 current CTSAs was conducted between July 2018 and May 2019. Resource content was independently reviewed by two reviewers and scored for the inclusion of each CEnR core competency domain. Domain scores across all resources were assessed using descriptive statistics.

RESULTS

Eight CEnR core competency domains were identified. Overall, 214 CEnR resources publicly accessible online from 35 CTSAs were eligible for review. Scoring discrepancies for at least one domain within a resource initially occurred in 51% of resources. "CEnR methods" (50.5%) and "Knowledge and relationships with communities" (40.2%) were the most frequently addressed domains, while "CEnR program evaluation" (12.1%) and "Dissemination and advocacy" (11.2%) were the least frequently addressed domains. Additionally, challenges were noted in navigating CTSA websites to access CEnR resources, and CEnR competency nomenclature was not standardized.

CONCLUSIONS

Our findings guide CEnR stakeholders to identify publicly accessible online resources and gaps to address in CEnR resource development. Standardized nomenclature for CEnR competency is needed for effective CEnR resource classification. Uniform organization of CTSA websites may maximize navigability.

Leading with inclusion during the COVID-19 pandemic

Inclusion is the deliberate practice of ensuring that each individual is heard, all personal traits are respected, and all can make meaningful contributions to achieve their full potential. As coronavirus disease 2019 spreads globally and across the United States, we have viewed this pandemic through the lens of equity and inclusion. Here, we discuss how this pandemic has magnified preexisting health and social disparities and will summarize why inclusion is an essential tool to traverse this uncertain terrain and discuss strategies that can be implemented at organizational and individual levels to improve inclusion and address inequities moving forward.

Abstract WP372: Hydration Status and Clinical Outcomes in Acute Ischemic Stroke Patients Undergoing Mechanical Thrombectomy

Introduction: Impaired hydration measured by elevated blood urea nitrogen (BUN) to creatinine ratio has been associated with worsened outcome after acute ischemic stroke. Whether hydration status is relevant for patients with acute ischemic stroke treated with mechanical thrombectomy remains unknown.

Materials and Methods: We conducted a retrospective review of consecutive acute ischemic stroke patients who underwent endovascular procedures for anterior circulation large artery occlusion at Johns Hopkins Comprehensive Stroke Centers between 2012 and 2017. A volume contracted state (VCS), was determined based on surrogate lab markers and defined as blood urea nitrogen (BUN) to creatinine ratio greater than 15. Endpoints were achievement of successful revascularization (TICI 2b or 3), early re-occlusion, and short term clinical outcomes including development of early neurological worsening and functional outcome at 3 months.

Results: Of the 158 patients who underwent an endovascular procedure, 102 patients had a final diagnosis of anterior circulation large vessel occlusion and met the inclusion criteria for analysis. Volume contracted state was present in 62/102 (61%) of patients. Successful revascularization was achieved in 75/102 (74%) of the cohort. There was no relationship between VCS and successful revascularization, but there was a 1.13 increased adjusted odds (95% CI 1.01, 1.27) of re-occlusion within 24 hours for every point higher BUN/creatinine ratio in the subset of patients who underwent radiological testing for pre-procedure planning (n=57). There was no relationship between VCS and clinical outcomes including early neurological worsening and 3 month outcome.

Conclusions: Patients with VCS and large vessel anterior circulation stroke may have a higher odds of early re-occlusion after mechanical thrombectomy than their non-VCS counterparts, but no differences in successful revascularization nor clinical outcomes were present in this cohort. These results may suggest an opportunity for the exploration of pre-procedure hydration to improve outcomes.

Abstract TMP87: Stroke Outcomes Related to Initial Volume Status, Diuretic Use, and Potassium Levels

Background and Purpose: The relationship between stroke outcome and initial presentation in a volume contracted state (VCS) has not been well established, and may intersect with concomitant diuretic use and serum potassium (K) levels. We hypothesized that stroke outcome is a function of multiple volume related factors.

Methods: We analyzed a prospective cohort of subjects with ischemic stroke <24 hours of onset, enrolled in acute treatment trials within the Virtual International Stroke Trials Archive. VCS was defined as a BUN-to-creatinine ratio>20 and hypokalemia as <3.5 mEq/L. The primary endpoint was modified Rankin Scale (mRS) at 90 days. Primary analysis employed generalized ordinal logistic regression over the full mRS range, with adjustment for THRIVE score, onset-to-enrollment time, and intravenous rtPA usage. Secondary analyses dichotomized the mRS.

Results: Of 5971 eligible patients, 44% were in a VCS and 56% were euvolemic. Patients with VCS were older, had more vascular risk factors, more severe strokes, and were more likely taking diuretics. VCS was not significantly associated with mRS scores after adjustment (Table). Post hoc sensitivity analysis using BUN-to-creatinine ratio>30 yielded similar results. Diuretic use was associated with worse outcomes (Table), mainly driven by non-K sparing diuretics, while K-sparing diuretics tended to have the opposite effect. Hypokalemia had discordant associations with mRS, depending on the analytic approach (Table). There was no evidence of effect modification among the three exposures of VCS, diuretic use, or hypokalemia in relation to outcome (all p>0.30).

Conclusions: A VCS at the time of hospitalization was associated with more severe stroke but not associated with worse functional outcome when accounting for key measurable baseline characteristics. However, diuretic use and low serum potassium at the time of stroke onset were associated with worse outcome and may be worthy of further investigation.

Synthetic cannabinoid-associated coagulopathy secondary to long-acting anticoagulant rodenticides: Observational case series and management recommendations

Synthetic cannabinoids have become increasingly popular drugs of abuse due to low cost and inability to detect these substances on routine drug screenings. In the United States, incidence of synthetic cannabinoid contamination with long-acting anticoagulant rodenticides (LAARs) resulting in coagulopathy and bleeding complications has been described.We sought to describe the natural history, management approach, and outcomes of bleeding secondary to synthetic cannabinoid-associated LAAR toxicity in an observational case series of patients evaluated at an urban academic medical system.We conducted an observational study of patients with suspected exposure to LAAR-contaminated synthetic cannabinoids and associated bleeding treated within the Johns Hopkins Health System.In this 16 subject cohort, hematuria was the most common bleeding symptom at presentation. The majority of the cohort (75%) had international normalized ratio (INR) > 9.6 at presentation. Of the 13 patients with brodifacoum testing, 12/13 (92%) were positive. Twelve patients (75%) had at least 1 INR value below 2 within 24 hours of the first INR measurement. Of this cohort, 1/16 (6%) died in hospital. The median length of hospital stay was 4 days, (interquartile range = 3-6). The average cost of pharmacological treatment for coagulopathy during inpatient hospitalization was $5300 (range, $2241-$8086).In patients presenting with unexplained coagulopathy it is important for emergency department providers to consider LAAR intoxication and consider formal testing for brodifacoum to assist with treatment planning. Use of a standardized management algorithm including intravenous/oral vitamin K, judicious use of blood products and close laboratory monitoring is essential to optimizing outcomes.

Physiological Effects of Early Incremental Mobilization of a Patient with Acute Intracerebral and Intraventricular Hemorrhage Requiring Dual External Ventricular Drainage

BACKGROUND

Recent trials have challenged the notion that very early mobility benefits patients with acute stroke. It is unclear how cerebral autoregulatory impairments, prevalent in this population, could be affected by mobilization. The safety of mobilizing patients who have external ventricular drainage (EVD) devices for cerebrospinal fluid diversion and intracranial pressure (ICP) monitoring is another concern due to risk of device dislodgment and potential elevation in ICP. We report hemodynamic and ICP responses during progressive, device-assisted mobility interventions performed in a critically ill patient with intracerebral hemorrhage (ICH) requiring two EVDs.

METHODS

A 55-year-old man was admitted to the Neuroscience Critical Care Unit with an acute thalamic ICH and complex intraventricular hemorrhage requiring placement of two EVDs. Progressive mobilization was achieved using mobility technology devices. Range of motion exercises were performed initially, progressing to supine cycle ergometry followed by incremental verticalization using a tilt table. Physiological parameters were recorded before and after the interventions.

RESULTS

All mobility interventions were completed without any adverse event or clinically detectable change in the patient's neurological state. Physiological parameters including hemodynamic variables and ICP remained within prescribed goals throughout.

CONCLUSION

Progressive, device-assisted early mobilization was feasible and safe in this critically ill patient with hemorrhagic stroke when titrated by an interdisciplinary team of skilled healthcare professionals. Studies are needed to gain insight into the hemodynamic and neurophysiological responses associated with early mobility in acute stroke to identify subsets of patients who are most likely to benefit from this intervention.

Pilot study of volume contracted state and hospital outcome after stroke

BACKGROUND

An increasing body of research suggests that acute stroke patients who are dehydrated may have worsened functional outcomes. We sought to explore the relationship between a volume contracted state (VCS) at the time of ischemic stroke and hospital outcomes as compared with euvolemic patients.

METHODS

We enrolled a consecutive series of ischemic stroke patients from a single academic stroke center within 12 hours from stroke onset. VCS was defined via surrogate markers (blood urea nitrogen/creatinine ratio >15 and urine specific gravity >1.010). The primary outcome was change in NIH Stroke Scale (NIHSS) score from admission to discharge. Multivariable analyses included adjustment for demographics and infarct size.

RESULTS

Over an 11-month study period, 168 patients were eligible for inclusion. Of the126 with complete laboratory and MRI data, 44% were in a VCS at the time of admission. Demographics were similar in both the VCS and euvolemic groups, as were baseline NIHSS scores (6.7 vs 7.3; p = 0.63) and infarct volumes (12 vs 16 mL; p = 0.48). However, 42% of patients in a VCS demonstrated early clinical worsening, compared with 17% of the euvolemic group (p = 0.02). A VCS remained a significant predictor of worsening NIHSS in adjusted models (odds ratio 4.34; 95% confidence interval 1.75-10.76).

CONCLUSIONS

Acute stroke patients in a VCS demonstrate worse short-term outcomes compared to euvolemic patients, independent of infarct size. Results suggest an opportunity to explore current hydration practices.

Abstract TP140: Very Early Mobilization In Critically Ill Stroke Patients With Primary Intracerebral Hemorrhage

Background: Spontaneous intracerebral hemorrhage (ICH) is associated with a disproportionately high mortality and disability when compared to ischemic stroke. Critically ill patients with ICH represent a specific challenge due to issues of intracranial pressure and hemodynamic instability in the early period post stroke. The aim of this study was to evaluate the effect of a progressive mobility algorithm, a structured tool used to guide mobilization of all patients in the neuroscience critical care unit (NCCU), on the time elapsed to earliest mobility activities in patients with primary ICH.

Methods: We used a quasi-experimental design to examine current mobility practices for patients with ICH after rollout of the mobility algorithm in our NCCU. The Johns Hopkins Mobility algorithm was developed by an interdisciplinary mobility team and stratifies NCCU patients to progressive passive or active mobilization programs. Baseline data were collected retrospectively from electronic medical records for two 6 month periods, one before and one after program implementation. Time of first mobilization and frequency of mobilization were reported for baseline and post intervention comparison and adjusted based on patient characteristics.

Results: Two groups of ICH patients (pre- rollout, n=28; post-rollout, n=29) were similar on baseline characteristics, with the exception of mean ICH severity scores which were greater in the post-rollout group (p=0.07). Patients in the post-intervention group were significantly more likely to be mobilized within the first 7 days after admission (55% versus 29% in the pre and post intervention groups respectively, p=0.04), No episodes of hypotension, falls or line dislodgements were reported in association with the early mobility intervention.

Conclusions: Use of a progressive mobility algorithm in stroke patients with spontaneous ICH increases the percentage of patients who are mobilized in the early critical period without issues of safety. Additional work in larger prospective cohorts is needed to evaluate the reasons for delay of mobilization on day one of hospitalization and to enhance data support for best practice timing recommendations.

Racial and Socioeconomic Disparities in Gastrostomy Tube Placement After Intracerebral Hemorrhage in the United States

BACKGROUND AND PURPOSE

Percutaneous endoscopic gastrostomy (PEG) tubes are widely used for enteral feeding of patients after intracerebral hemorrhage (ICH). We sought to determine whether PEG placement after ICH differs by race and socioeconomic status.

METHODS

Patient discharges with ICH as the primary diagnosis from 2007 to 2011 were queried from the Nationwide Inpatient Sample. Logistic regression was used to evaluate the association between race, insurance status, and household income with PEG placement.

RESULTS

Of 49 946 included ICH admissions, a PEG was placed in 4464 (8.94%). Among PEG recipients, 47.2% were minorities and 15.6% were Medicaid enrollees, whereas 33.7% and 8.2% of patients without a PEG were of a race other than white and enrolled in Medicaid, respectively (P<0.001). Compared with whites, the odds of PEG were highest among Asians/Pacific Islanders (odds ratio [OR] 1.62, 95% confidence interval [CI] 1.32-1.99) and blacks (OR 1.42, 95% CI 1.28-1.59). Low household income (OR 1.25, 95% CI 1.09-1.44 in lowest compared with highest quartile) and enrollment in Medicaid (OR 1.36, 95% CI 1.17-1.59 compared with private insurance) were associated with PEG placement. Racial disparities (minorities versus whites) were most pronounced in small/medium-sized hospitals (OR 1.77, 95% CI 1.43-2.20 versus OR 1.31, 95% CI 1.17-1.47 in large hospitals; P value for interaction 0.011) and in hospitals with low ICH case volume (OR 1.58, 95% CI 1.38-1.81 versus OR 1.29, 95% CI 1.12-1.50 in hospitals with high ICH case volume; P value for interaction 0.007).

CONCLUSIONS

Minority race, Medicaid enrollment, and low household income are associated with PEG placement after ICH.

Abstract T MP86: A Prospective Study of the Effect of Dehydration on Stroke Severity and Short Term Outcome

Background: Many ischemic stroke patients present to the hospital in a state of dehydration. We hypothesized that patients who were dehydrated at the time of acute stroke would have more severe stroke and worse short term outcomes.

Methods: We enrolled consecutive ischemic stroke patients within 12 hours from their last normal neurological exam at a single academic health system. Patients with renal failure or who were unable to undergo MRI were excluded. Surrogate markers for dehydration were defined as BUN/Creatinine ratio >15 and urine specific gravity >1.010. Stroke severity was determined based on clinical examination (NIHSS score) and lesion volume measured on diffusion weighted MRI. The primary outcome of interest was change in NIHSS from admission to discharge.

Results: We surveyed 383 ischemic stroke admissions to our comprehensive stroke center. Of these, 168 met inclusion criteria with 126/168 (75%) having complete laboratory and MRI data. 44% of our patients were dehydrated at the time of admission, with no difference in demographics between the dehydrated and hydrated groups. Baseline NIHSS (6.7 vs 7.3; p=0.63) and lesion volumes (12 vs 16; p=0.48) were similar in the two groups. 42% of dehydrated patients were in the worst short term quartile of NIHSS change, as compared with 17% of the hydrated group (p=0.02). Dehydration remained a significant predictor of having the worst NIHSS change, after adjustment for age, initial NIHSS, lesion volume, and admission glucose (OR=4.34, 95% CI 1.75-10.76).

Conclusions: Nearly half of acute stroke patients admitted to the hospital are dehydrated by surrogate laboratory markers. Acute stroke patients with markers of dehydration demonstrate greater worsening in NIHSS scores as compared with hydrated patients, independent of infarct size. Results suggest an opportunity for an inexpensive and globally available treatment to optimize functional outcomes of the stroke patient.

Orientation Program for Hospital-Based Nurse Practitioners

The transition from student to practicing clinician is often a challenging and difficult period for many nurse practitioners. Newly graduated nurse practitioners commonly describe feelings of inadequacy in assuming clinical responsibilities, lack of support by team members, unclear expectations for the orientation period, and role isolation. This article describes the formal nurse practitioner orientation program implemented at the University of Maryland Medical Center, a large urban academic medical center, to facilitate the transition of new nurse practitioners into the workforce. This comprehensive program incorporates streamlined administrative activities, baseline didactic and simulation-based critical care education, ongoing and focused peer support, access to formalized resources, and individualized clinical preceptor programs. This formalized orientation program has proven to be one of the key variables to successful integration of nurse practitioners into our acute care clinical teams.

Local intraarterial fibrinolysis administered in aliquots for the treatment of central retinal artery occlusion: the Johns Hopkins Hospital experience

BACKGROUND AND PURPOSE

Central retinal artery occlusion results in acute visual loss with poor spontaneous recovery. Current standard therapies do not alter the natural history of disease. Several open-label clinical studies using continuous infusion of thrombolytic agents have suggested that local intraarterial fibrinolysis (LIF) is efficacious in the treatment of central retinal artery occlusion. The aim is to compare the visual outcome in patients with acute central retinal artery occlusion of presumed thromboembolic etiology treated with LIF administered in aliquots with that of patients treated with standard therapy.

METHODS

We conducted a single-center, nonrandomized interventional study of consecutive patients with acute central retinal artery occlusion from July 1999 to July 2006.

RESULTS

Twenty-one patients received LIF and 21 received standard therapy. Seventy-six percent of subjects in the LIF group had a visual acuity improvement of one line or more compared with 33% in the standard therapy group (P=0.012, Fisher exact). Multivariate logistic regression controlling for gender, history of prior stroke/transient ischemic attack, and history of hypercholesterolemia showed that patients who received tissue plasminogen activator were 36 times more likely to have improvement in visual acuity (P=0.0001) after adjusting for these covariates. Post hoc analysis showed that patients who received tissue plasminogen activator were 13 times more likely to have improvement in visual acuity of 3 lines or more (P=0.03) and 4.9 times more likely to have a final visual acuity of 20/200 or better (P=0.04). Two groin hematomas were documented in the LIF group. No ischemic strokes, retinal or intracerebral hemorrhages were documented.

CONCLUSIONS

LIF administered in aliquots is associated with an improvement in visual acuity compared with standard therapy and has few side effects.

Shortening time to stroke treatment using ambulance telemedicine: TeleBAT

OBJECTIVE

Patients with ischemic stroke treated with tissue plasminogen activator (rt-PA) have better outcomes when treated closer to the time of symptom onset and within the 3-hour window. We previously demonstrated the clinical use of TeleBAT, a mobile telemedicine system for stroke. We tested the impact of that system on time to treatment for patients with acute stroke.

METHODS

Validity and reliability were tested by comparing neurologic examination scores obtained using our wireless system, which transmits video of a patient from a moving ambulance to desktop computers, with those obtained using the National Institute of Neurological Disorders and Stroke training videotape. TeleBAT validity and good interrater reliability were defined a priori as a kappa statistic of r > 0.5. We compared the average time to treatment for our TeleBAT-evaluated intervention group with that for our control group. The intervention group consisted of two actor patients with stroke mimicking 12 stroke scenarios and evaluated using TeleBAT. The control group consisted of patients with stroke evaluated and treated with rt-PA on arrival to the emergency department. Data were analyzed using standard t test.

RESULTS

National Institutes of Health Stroke Scale items calculated by the neurologists suggest TeleBAT is valid for assessing patients with stroke remotely. Interrater reliability was high: the neurologists gleaned the same information from TeleBAT transmissions. Kappa values for both validity and reliability exceeded 0.5. The mean time to treatment for patients assessed by TeleBAT was 17 +/- 4 minutes compared with 33 +/- 17 minutes for our control group (P = .0033).

CONCLUSION

TeleBAT seems to be a valid and reliable means of evaluating stroke neurologic deficits. Time to treatment was shortened using ambulance transport time to evaluate patients as candidates for thrombolytic therapy. Future studies should use a randomized design with patients with acute stroke.

A noninvasive portable acoustic diagnostic system to differentiate ischemic from hemorrhagic stroke

PURPOSE

To determine if a noninvasive brain acoustic monitor can differentiate acoustic responses from "normal patients" and ischemic from hemorrhagic stroke patients.

METHODS

A laptop-sized passive acoustic monitoring system acquires arterial-pressure-generated signals during a 15-second monitoring session from sensors placed at the radial artery and on the fore-head. The arterial pulse waveform from the head is compared with that of the arterial waveform to generate the time-domain signal comparison. Frequency domain signals from each area are also compared. The study involved patients with diagnosis of first stroke who could be monitored within 12 hours of symptom onset and normal subjects who provided informed consent. Individuals with history of brain injury, stroke, or other brain disease were excluded.

RESULTS

Twelve normal subjects and 6 ischemic stroke, 2 transient ischemic attack (TIA), and 3 hemorrhagic stroke patients were monitored. Frequency response analysis identified uniform frequency responses in normal subjects. The signal in ischemic stroke patients was characterized by a divergence of the radial and cranial frequency response between 10 and 50 Hz of 10 dB or greater. In intracerebral hemorrhage patients, a divergence was seen below 10 Hz but not in the band above 10 Hz. TIA patients were monitored after symptom resolution and showed a divergence <10 dB in both bands, similar to normal subjects.

CONCLUSIONS

In a pilot study using a noninvasive monitor, the authors detected a potential to differentiate between normal subjects and those with cerebral ischemia or hemorrhage.

Telemedicine for acute stroke: triumphs and pitfalls

BACKGROUND AND PURPOSE

Telemedicine is emerging as a potential timesaving, efficient means for evaluating patients experiencing acute stroke. In areas where local stroke care specialists are not available, telemedicine can link an emergency department physician with a specialist in a stroke treatment center. This consultation provides an opportunity for administration of thrombolytic drugs within the short therapeutic time window associated with ischemic stroke. Here, we describe our stroke treatment center experiences and report safe administration of recombinant tissue plasminogen activator (rtPA) during telemedicine consultation.

METHODS

The University of Maryland Medical Center uses a triplexed integrated services digital network line providing a 30--frames-per-second video link to St Mary's Hospital >100 miles away. The system uses a pan, tilt, and zoom camera with remote site control, allowing 2-way, real-time, audiovisual communication and CT image transfer. We retrospectively reviewed all acute stroke consultations provided to St Mary's Hospital between 1999 and 2001.

RESULTS

We reviewed 50 consultations. Of the 50, 23 were attempted through telemedicine linkage, and 27 were by traditional telephone conversation, followed by transfer. Of the 23 telemedicine consultations, 2 were aborted because of technical difficulties. Of the patients evaluated by traditional means, 1 of 27 (3.8%) received intravenous rtPA; 5 of 21 (23.8%) received rtPA after telemedicine consultation. No patients experienced complications.

CONCLUSIONS

Telemedicine consultation provided treatment options not previously available at the remote hospital. Administration of rtPA during telemedicine consultation was feasible and safe, and the system was well received. Lack of reimbursement for telemedicine services will hinder widespread adaptation of this promising technology for remote acute stroke treatment.

Safe rt-PA Administration for Ischemic Stroke During Telemedicine Consultation

P191

Background: Telemedicine (TM) is emerging as a time-saving, efficient means for acute stroke evaluation. Absence of a local consulting stroke physician, and short therapeutic time window make TM an ideal alternative for providing patients at remote facilities optimal care. We describe our stroke treatment center (STC) experiences and report safety of rt-PA administration during TM consultation. Methods: The University of Maryland Medical Center (UMM) uses VTEL TC2000 units with triplexed ISDN line providing 30 fps video link to St. Mary’s Hospital, >100 miles distance. The Millard Fillmore Gates Circle Hospital (Gates) uses Sony TriniCom 3000 Plus Model 256 units with ISDN line at 256 Khz, linked to Millard Fillmore Suburban Hospital, 15 miles distance. An additional unit links to the stroke neurologist’s home. Both systems use pan, tilt and zoom camera with remote site control allowing two-way, realtime, audiovisual communication and CT transfer. Results: 2/18 patients received rt-PA during TM consultation with the UMM Brain Attack Team and 3/12 by the Gates stroke specialist. Two were treated from the home link, and three via ED to ED transmission. Transport to the consulting STC occurred after completion of lytic therapy in 4 cases; in 1 case transport occurred during treatment. 4 out of 5 patients had excellent recovery defined as NIHSSS ≤1; 1 patient initially improved, but later had clinical symptoms of reocclusion. No patient experienced complications. Remote ED staff enthusiastically request TM consultation because of 1) ease of adaptability to clinical and technical procedures, and 2) immediate two-way audiovisual access to stroke specialist. Patients and family members rate the TM experience highly at post-consultation interview. Conclusions: TM consultation increased rt-PA administration from 0% to 6%, and provided treatment options not previously available at the remote hospitals. Administration of rt-PA during TM consultation was safe and effective and the system was well-received by clinicians and patients. Lack of reimbursement for TM services will hinder widespread adaptation of this exceptional technology for remote acute stroke treatment.