Association of 24 h Blood Pressure on Functional Outcome in Patients with Acute Ischemic Stroke Post Intravenous Thrombolysis.

INTRODUCTION: Elevated admission blood pressure (BP) and BP variability have been shown to be associated with poor outcomes in most studies, while few studies have not found such an association. We investigated the association of various BP parameters with 3-month functional outcomes, mortality, and symptomatic intracerebral hemorrhage (sICH) in patients with acute ischemic stroke (AIS) receiving intravenous thrombolysis (IVT). METHODS: Patients with AIS who received IVT between January 2012 and March 2020 were analyzed. Admission BP, 24 h mean BP, and BP variability were noted for all patients. Outcomes assessed were 3-month modified Rankin Scale (mRS), mortality, and sICH. RESULTS: Of the 237 patients, 161 were males. The mean admission systolic BP (SBP), 24 h mean SBP, and BP variability were 158.1 mm Hg (SD 30.25), 138 mm Hg (SD 16.78), 19.42 (SD 12.79), respectively. At 3 months, 147 (62%) patients had a good outcome (mRS 0-2). Multivariate analysis showed prior stroke, NIHSS >15, mean SBP ≥160 mm Hg, and SBP variability >45 to be significant predictors of poor outcome (mRS > 2) at 3 months. Eleven patients (4.6%) developed sICH. Age more than 60 years, presence of atrial fibrillation, admission blood sugar ≥180 mg/Dl, and SBP variability >45 predicted sICH. None of the above factors were predictive of 3-month mortality. CONCLUSION: An elevated mean SBP and greater SBP variability were predictive of poor functional outcomes, whereas a high SBP variability predicted sICH. Our study emphasizes the need for BP control and minimizing large fluctuations to achieve good poststroke outcomes.

Central nervous system adverse events after ChAdOx1 vaccination.

INTRODUCTION: Post-ChAdOx1 vaccine (AZD1222) adverse events following immunization (AEFI) are uncommon. Recently described neurological events include thrombocytopenia with thrombosis syndrome (TTS) with cerebral venous thrombosis and Guillain-Barré syndrome. There are very few AEFI reports following COVID vaccination from India, because of underreporting or other factors. A few cases of acute transverse myelitis (ATM) and post-vaccinal encephalitis have also been reported. MATERIALS AND METHODS: Over 11 months, in 2 districts of Kerala, India, 8.19 million people were vaccinated with the ChAdOx1 vaccine. RESULTS: During this period, we encountered five cases of autoimmune central nervous system (CNS) AEFI following ChAdOX1 (Oxford/AstraZeneca, Covishield™) vaccination. These included three cases of acute disseminated encephalomyelitis (ADEM), one case of opsoclonus myoclonus ataxia syndrome (OMAS), and one case of limbic encephalitis. The calculated crude incidence of post-ChAdOX1 autoimmune CNS AEFI was approximately 0.24 cases per million for encephalitis and 0.36 per million for ADEM. This was compared to the crude annual incidence of community-acquired ADEM worldwide (3.2-4 per million) and the crude annual incidence of community-acquired encephalitis in India (8.35-10 per million). CONCLUSION: There was no increase in the incidence of post-vaccination CNS AEFI (ADEM or encephalitis) as compared to the community incidence of ADEM or encephalitis. While this emphasizes the safety of ChAdOX1 nCoV-19 vaccination for COVID-19, it is important to recognize these post-vaccination autoimmune syndromes early to initiate immunosuppressive therapy.

Does thrombus imaging characteristics predict the degree of recanalisation after endovascular thrombectomy in acute ischaemic stroke?

BACKGROUND: Identification of computed tomography (CT) thrombus imaging characteristics can predict the degree of recanalization and outcome after endovascular thrombectomy (EVT) in patients with acute ischaemic stroke and large vessel occlusion. AIM: We analyzed the thrombus imaging characteristics and procedural factors and correlated with the degree of recanalization and functional outcome after EVT. METHODS: We evaluated the thrombus imaging characteristics (hyperdense MCA sign, thrombus location, length and thrombus permeability) from thin slice CT and CT angiogram. In addition, groin to recanalization time, number of passes, and EVT technique were documented. The primary outcome was degree of recanalization (mTICI score) and secondary outcome was modified Rankin scale (mRS) at 3 months. RESULTS: The mean age of 102 patients was 60.5±11.8 years. Patients with hyperdense MCA sign (90 % vs 75%, p=0.07) and permeable thrombus (86 % vs 70 %, p=0.09) had good recanalization (mTICI grade 2b,2c or 3). The requirement of <3 passes (90 % vs 62 %, p= 0.001) was associated with good recanalization. Multiple logistic regression analysis showed thrombus permeability (OR 5.9; 95% CI 1.3-26.6, p=0.02), use of stent retreiver alone (without aspiration) (OR 5.4; 95% CI 1.3-22.5, p=0.02) and a puncture to recanalization ≤60 minutes (OR 7.9; 95% CI 1.7-36.8; p=0.008) were associated with good recanalization. The requirement of ≥3 passes was associated with poor functional outcome (OR 3.4;95% CI 1.2-9.8; p=0.02). CONCLUSIONS: Thrombus permeability was a predictor of successful recanalization after EVT. The requirement of three or more passes during EVT was associated with poor recanalization and poor functional outcome.

Predictors of outcome in super refractory status epilepticus.

PURPOSE: We conducted this study to determine the clinical, electrophysiological and radiological predictors of outcome in Super Refractory Status Epilepticus (SRSE). METHODS: Data of patients treated for SRSE between January 2000 and November 2019, archived prospectively in our SE registry were analyzed. Functional outcome was measured by Glasgow outcome score (GOS) at the time of hospital discharge and was divided into: good i.e. GOS ≥ 3 and bad outcome i.e. GOS < 3. The predictors of outcome were determined using appropriate statistical tests by univariate and multivariate analysis, p < 0.05 was considered as statistically significant. RESULTS: Of the 384 patients with status epilepticus (SE) identified during the study, 28 (8%) were diagnosed as SRSE and were included in the final analysis. Acute symptomatic SE comprising 15 (53.6%) patients was the most common etiology of SRSE. Thirteen patients (three patients with viral encephalitis and 10 patients with clinically possible autoimmune encephalitis) had New Onset Refractory Status Epilepticus (NORSE) like clinical presentation.12 patients (42.9%) had good outcome and 16 patients (57.1%) had bad outcome. Multivariate logistic regression analysis showed that independent predictors of poor outcome were: duration of ICU stay (p < 0.001); EEG findings such as non-convulsive SE in coma (0.032), spontaneous burst suppression (0.001) and postictal diffuse attenuation (<0.001); delay in starting anesthesia (0.002); and delay in starting immunotherapy in NORSE due to autoimmune encephalitis (0.002). CONCLUSION: We could determine independent therapeutic and electrophysiological prognostic factors for SRSE. Early initiation of treatment and stringent management of these factors especially in an younger age-group, aided by continuous EEG monitoring and a thorough etiological work-up can result in good outcomes in more than one-third of cases.

Utility of intracranial high-resolution vessel wall magnetic resonance imaging in differentiating intracranial vasculopathic diseases causing ischemic stroke.

PURPOSE: High-resolution vessel wall imaging (HRVWI) by MRI is a novel noninvasive imaging tool which provides direct information regarding vessel wall pathologies. The utility of HRVWI in differentiating various intracranial vasculopathies among ischemic stroke is still evolving. METHODS: Consecutive ischemic stroke/TIA patients within 2 weeks of symptom onset between January 2016 to December 2017, with symptomatic vessel stenosis of 50% or more/occlusion on baseline luminal imaging studies were recruited into the study. Stroke subtypes were classified as per TOAST classification initially on the basis of luminal imaging findings alone and subsequently after incorporation of HRVWI findings as well. RESULTS: Forty-nine subjects were recruited into the study. The median age of the population was 42 years (range 11 to 75) with 69% being males. Incorporation of HRVWI findings classified 38.8% subjects into intracranial atherosclerotic disease (ICAD), 32.6% as stroke of other determined aetiology (ODE) (inflammatory vasculopathy [IVas] being the major subgroup [81.2%]) and 28.6% into stroke of undetermined aetiology (UE). HRVWI enabled a diagnostic reclassification in an additional 47.3% among the baseline UE category as against luminal imaging findings alone. ICAD was likelier to have eccentric vessel wall thickening, eccentric vessel wall enhancement and T2 juxtaluminal hyperintensity with surrounding hypointensity (P < 0.001), while IVas were more likely to exhibit concentric vessel wall thickening with homogenous enhancement (P < 0.001). CONCLUSION: HRVWI is a useful noninvasive adjunctive tool in the diagnostic evaluation of intracranial vasculopathies, with maximum benefit in ICAD and IVas subtypes.

Status epilepticus related to pregnancy: Devising a protocol for use in the intensive care unit.

BACKGROUND: Status epilepticus (SE) related to pregnancy is rare and carries a significant risk to both the mother and the fetus. OBJECTIVES: We conducted this study to devise a protocol for the management of SE related to pregnancy in a cohort of female patients admitted with SE during pregnancy. MATERIALS AND METHODS: All women who developed SE related to pregnancy (gestation, labor, and puerperium) between January 2000 and December 2016 were included. Data was collected using a structured proforma. RESULTS: There were 17 women who had SE related to pregnancy, of whom 10 had refractory SE. The various causes of refractory SE were eclampsia (N = 2), posterior reversible encephalopathy syndrome (PRES) due to various causes other than eclampsia (N = 3), cortical venous thrombosis (CVT) [N = 3], subarachnoid hemorrhage (SAH) [N = 1], and N-methyl-D-aspartate (NMDA) receptor antibody-mediated encephalitis (N = 1). Six out of 10 women with refractory SE (60%) and five out of 10 fetuses (50%) had a good outcome. CONCLUSION: There is a dearth of literature with regards to SE related to pregnancy and little or no guidelines exist for its management. Awareness about the diverse etiologies other than eclampsia is important. A protocol-based approach to the diagnosis and management of SE is necessary to ensure best outcomes.

Physiotherapy practice in stroke rehabilitation: a cross-sectional survey of physiotherapists in the state of Kerala, India.

BACKGROUND: Physiotherapy, a major component of rehabilitation for stroke patients, has been shown to have a positive effect on outcome. However, there is debate over efficacy of different interventions related to stroke rehabilitation. PURPOSE: The purpose of this study was to compare knowledge and attitudes of physiotherapists working with stroke patients in Kerala, India, with emphasis on demographics, approach to treatment, and beliefs about stroke rehabilitation. METHODS: Two hundred one physiotherapists in Kerala were surveyed using questionnaires, which were sent by post. Questionnaires consisted of items related to stroke rehabilitation such as approaches to physiotherapy, use of walking aids, and discharge issues. Data analysis was done using percentage-wise comparisons. RESULTS: Examination of results showed variation in the beliefs held by physiotherapists about treatment of stroke patients. Of the 201 respondents, 153 (76.1%) used a conventional treatment approach. There was a strong disparity among physiotherapists regarding use of walking aids by stroke patients: 119 (59.2%) agreed that tripods or quadripods should be given to patients, but 55 (27.4%) disagreed and 27 (13.4%) were unsure. In response to questions about discharge issues, 30 (14.9%) of the 118 respondents agreed that they were actively involved in discharge planning for stroke patients, and 158 (78.6%) agreed that skill of the physiotherapist influences outcomes. CONCLUSION: A great deal of variation among physiotherapists in treatment approaches and beliefs was revealed in this study, which indicates the need for development and implementation of a standardized protocol for stroke rehabilitation in Kerala.

Complications in acute stroke in India (CAST-I): a multicenter study.

The prognosis and final outcome in patients who sustain stroke are significantly affected by medical complications occurring during the acute phase of stroke. Only limited information is available from India and other developing countries regarding acute complications of stroke. This study examined the frequency of acute stroke and the factors associated with complications of stroke in India. In this prospective multicenter study, running from March 2008 to September 2009, 6 hospitals collected information on complications of first-ever stroke during admission. Complications were defined in accordance with standard criteria. Outcome at 30 days poststroke was assessed using the modified Rankin Scale. Stroke characteristics, length of hospital stay, and stroke severity (based on the National Institutes of Health Stroke Scale) were documented. Hematologic (ie, hemoglobin) and biochemical (ie, total proteins and albumin) parameters also were obtained. A total of 449 patients out of the recruited 476 completed follow-up. The mean age was 58.1 ± 13.7 years (range, 16-96 years), and the majority were men (n = 282; 62.8%). The mean National Institutes of Stroke Scale score was 10.2 ± 5.3. Overall, 206 patients (45.9%) experienced complications during admission. In the logistic regression analysis, limb weakness (odds ratio [OR], 0.12; 95% confidence interval [CI], 0.02-0.67; P = .01), anemia (OR, 0.35; 95% CI, 0.15-0.81; P = .01), length of hospital stay (OR, 0.89; 95% CI, 0.85-0.94; P < .0001), and stroke severity (OR, 0.27; 95% CI, 0.10-0.72; P = .01) were the variables associated with complications. Such complications as urinary tract infection (OR, 0.31; 95% CI, 0.13-0.78; P = .01), chest infection (OR, 1.81; 95% CI, 1.12-2.93; P = .02), bedsores (OR, 3.52; 95% CI, 1.02-12.08; P = .05), other pain (OR, 0.21; 95% CI, 0.09-0.49; P < .0001), and depression (OR, 2.22; 95% CI, 1.30-3.80; P < .01) were associated with poor outcome. Our study shows high rates of complication in acute stroke. Limb weakness, stroke severity, length of hospital stay, and anemia were the factors associated with complications. Other complications, such as urinary tract infection, chest infection, bedsores, other pain, and depression, can lead to poor outcome.

Prevalence of Aortic Plaques in Cryptogenic Ischemic Stroke: Correlation to Vascular Risk Factors and Future Events.

Background and Purpose: Limited data is available regarding the prevalence of aortic plaques in cryptogenic ischemic strokes and its correlation with risk factors. Aim: To determine the prevalence of aortic plaques in patients with cryptogenic ischemic stroke and its association with vascular risk factors and future vascular events. Methodology: Patients with cryptogenic ischemic stroke/TIA evaluated with CT angiogram (CTA) were recruited. Aortic plaque thickness ≥4 mm, plaque ulceration, protruding components, and complex plaques were considered significant. Results: Of the 1,767 patients, 229 (12.9%) had cryptogenic ischemic stroke/transient ischemic attack (TIA). Of them, 36 (15.7%) patients were detected to have significant aortic plaques. The significant plaque group had a higher mean age (68.3 ± 8.3 vs 54.4 ± 13.2, P = 0.0005) and were more likely to have risk factors like hypertension (P = 0.025), coronary artery disease (CAD)(P = 0.015), and peripheral vascular disease (POVD) (P = 0.029). Plaque morphology showed plaques of ≥4 mm, ulcerated plaques, protruding components, and complex plaques in 14.8%, 5.6%, 3.1%, and 6.5% patients, respectively, which are predominantly located in the aortic arch (44%). At 1 year combined endpoint of stroke, TIA, and vascular death was significantly higher in the significant plaque group (19.4% vs 6.2%, P = 0.016). Advanced age (adjusted OR-1.11, 95% CI-1.07-1.17, P = <0.001) was identified as an independent risk factor for significant aortic plaques on multivariate analysis. Conclusions: Aortic plaques are an under-recognized cause of cryptogenic stroke. The significant risk factors in aortic plaque group highlight the importance of aggressive risk factor control for secondary stroke prevention.

Carotid endarterectomy for symptomatic carotid stenosis: differences in patient profile in a Low-Middle Income Country.

INTRODUCTION: Carotid Endarterectomy (CEA) is the standard treatment for patients with symptomatic carotid stenosis. Data from Low- and Middle-Income Countries (LMIC) is sparse on CEA and its outcomes. We aimed to describe the profile of our patients, and factors associated with periprocedural cerebral ischemic events in patients with symptomatic carotid stenosis who underwent CEA in our institute. METHODS: Retrospective review of patients with symptomatic carotid stenosis(50-99%) who underwent CEA between January 2011 and December 2021 was done. Clinical and imaging parameters and their influence on periprocedural cerebral ischemic events were analysed. RESULTS: Of the 319 patients (77% males) with a mean age of 64 years (SD ±8.6), 207 (65%) presented only after a stroke. Majority (85%) had high grade stenosis (70%) of the symptomatic carotid. The mean time to CEA was 50 days (SD ±36), however only 26 patients (8.2%) underwent surgery within 2 weeks. Minor strokes and TIA occurred in 2.2%, while major strokes and death occurred in 4.1% patients. None of the clinical or imaging parameters predicted the periprocedural cerebral ischemic events. The presence of co-existing significant (50%) tandem intracranial atherosclerosis (n=77, 24%) or contralateral occlusion (n=24, 7.5%) did not influence the periprocedural stroke risk. CONCLUSION: There is a delay in patients undergoing CEA for symptomatic carotid stenosis. Majority have high grade stenosis and present late only after a stroke reflecting a lack of awareness. CEA can be performed safely even in patients with significant intracranial tandem stenosis and contralateral carotid occlusion.

Mechanical Thrombectomy in Acute Ischemic Stroke: Angiographic Predictors of Outcome.

Background: In patients with acute ischemic stroke with large vessel occlusion, various angiographic features are important in patient selection and predicting outcome. Objective: We evaluated angiographic features like collaterals, clot burden score, angiographic recanalization, number of passes, and intracranial atherosclerotic disease (ICAD) with the functional outcome at 90 days. Materials and Methods: This was a retrospective analysis of prospectively collected data of 163 patients with acute ischemic stroke with large vessel occlusion who underwent mechanical thrombectomy within 24 hours of symptom onset. Angiographic data were reviewed blinded to clinical data. The outcome was defined as modified Rankin scale (mRS) at 90 days (good outcome mRS ≤2). Results: The median age of patients was 60 years and 34.4% were females. The median National Institutes of Health Stroke Scale (NIHSS) and Alberta Stroke Programme Early CT Score (ASPECTS) at admission were 17 and 6, respectively. On bivariate analysis, ASPECTS was >6, clot burden score was ≥7, recanalization of TICI was ≥2b, absence of ICAD, showed a positive correlation with the good outcome at 90 days (P-values of 0.003, 0.0001, and 0.03, respectively). Multiple attempts of device passes were associated with poor recanalization (P = 0.001) and it was seen more in ICAD patients. On multivariate analysis, independent predictors of poor outcome were clot burden score <7 (P = 0.043) and TICI score <2b (P = 0.048). Out of 41 patients (26%) with ICAD, 29 had a poor outcome at 90 days. Conclusion: Lower clot burden and less degree of recanalization were associated with poor outcome in acute ischemic stroke due to Large vessel occlusion (LVO). The presence of ICAD also predicted poor outcome.

Premorbid nutrition and short term outcome of stroke: a multicentre study from India.

BACKGROUND: Little is known about the impact of premorbid undernutrition on stroke outcome in developing countries. AIM: To study the impact of premorbid undernutrition status, measured by the Subjective Global Assessment (SGA) tool, on short term stroke outcome. METHODS: First ever stroke patients admitted to six major hospitals in North and South India participated in this study from 1 March 2008 to 30 September 2009. The SGA tool was administered within 48 h of stroke onset, and 6 months premorbid nutritional status was rated as well nourished (A rating) and undernourished (B and C ratings) using this tool. Stroke outcome was assessed after 30 days using the modified Rankin scale (mRs), and a mRs score >3 was defined as a poor outcome. Statistical analyses were performed using SPSS Statistics V.17.0. RESULTS: Of 477 patients enrolled, 448 patients were included in the analyses. Mean age was 58.1±13.7 years (range 16-96) and 281 (62.7%) patients were men. At admission, premorbid undernutrition was found in 121 (27.2%) patients. Older age (OR 4.99, CI 1.26 to 19.64, p=0.021), hypertension (OR 1.99, CI 1.04 to 3.79, p=0.037) and patients from Andhra Pradesh State (OR 1.87, CI 1.05 to 3.32, p=0.032) were predictors of undernutrition in multiple logistic regression analysis. Premorbid undernutrition (OR 1.99, CI 1.20 to 3.31, p=0.007) and length of hospital stay (OR 3.41, CI 1.91 to 6.06, p<0.0001) were the independent predictors of poor outcome in the multiple logistic regression model. CONCLUSIONS: High rates of premorbid undernutrition in stroke patients were found. Age, hypertension and patients from Andhra Pradesh State were predictors of premorbid undernutrition. Premorbid undernutrition was associated with poor stroke outcome. The results provide opportunities for primary prevention and improving stroke outcome.

"Sequential multimodality stimulation" for post-stroke-hemineglect: Feasibility and outcome in a pilot randomized controlled trial.

OBJECTIVE: To test the feasibility and efficacy of multimodality stimulation combined with motor tasking as a corrective strategy for hemineglect following right hemispheric ischemic strokes. MATERIAL AND METHODS: A prospective randomized controlled single blinded clinical trial was conducted over eighteen months from January 2017. All patients with right hemispheric ischemic strokes were screened for hemineglect and those fulfilling criteria were recruited and randomized. Patients under the therapy group (TG) received the intervention based on a structured protocol in addition to standard physiotherapy. The control group (CG) received standard physiotherapy alone. NIHSS, mRS and Neuropsychological test scores were recorded at different time points. The primary outcome measures (neuropsychological test scores) were compared between the two groups (Student's t-test to find out the difference in outcome measures) at one and three months post-stroke. RESULTS: Of the 14 patients recruited, data from 12 were available for analysis, 5 patients in TG and 7 in CG. There was a trend for better hemineglect and functional outcomes in TG. CONCLUSION: Multimodality stimulation, in addition to standard physiotherapy, is feasible and potentially results in better neurocognitive and functional recovery following right hemispheric ischemic strokes. However, larger studies are warranted to prove these preliminary observations beyond doubt.

Incidence, types, risk factors, and outcome of stroke in a developing country: the Trivandrum Stroke Registry.

BACKGROUND AND PURPOSE: Despite increasing burden of stroke in developing countries, population-based data are rare. Through the Trivandrum Stroke Registry, we intend to assess incidence, types, risk factors, and outcome of stroke among urban and rural dwellers of a South Indian community. METHODS: We ascertained all first-ever strokes occurring among 741,000 urban and 185,000 rural inhabitants of Trivandrum, Kerala. In addition to Steps 1 and 2 of World Health Organization STEPS Stroke Manual, we used multiple supplementary methods to maximize ascertainment of nonfatal and nonhospitalized fatal stroke events in the community. RESULTS: During a 6-month period, 541 strokes were registered, 431 in the urban and 110 in the rural communities. Stroke occurred at a median age of 67 years; only 3.8% of patients were aged

Dwell Time of Stentriever Influences Complete Revascularization and First-Pass TICI 3 Revascularization in Acute Large Vessel Occlusive Stroke.

OBJECTIVE: In acute ischemic stroke with large vessel occlusion, the interaction between the clot retriever and the stent is critical for achieving successful recanalization. The ideal time of stent deployment (dwell time [DT]) to improve revascularization is currently unknown. We systematically analyzed the effect of different DT on final angiographic and clinical outcomes of patients who underwent mechanical thrombectomy. METHODS: The DT was progressively increased from 3 minutes to 5 minutes and then 8 minutes during the study period. The effect of DT on recanalization attempts, successful angiographic outcome (thrombolysis in cerebral ischemia [TICI] 2b or TICI 3), total revascularization time, and immediate and 3-month clinical outcomes were evaluated. The DT of 3 minutes and 5 minutes (DT3-5) was compared against DT of 8 minutes (DT8). RESULTS: Forty patients were included in the analysis. Good angiographic outcome was observed in 94.1% of patients in the DT8 cohort with an average attempt of 1.2 compared with 78.3% with average attempts of 2.0 in other group. Single-pass good recanalization (TICI 2b or 3) and single-pass complete revascularization (TICI3) was significantly higher in the DT group compared with the DT3-5 group (82.4% vs. 43.5% [P = 0.013] and 42.9% vs. 8.7% [P = 0.003], respectively). A favorable trend toward a reduced overall procedural time (34.59 vs. 55.59 minutes) was observed, but was not statistically significant (P = 0.15). CONCLUSIONS: Mild prolongation of DT to 8 minutes improves revascularization outcome with fewer attempts, possibly because of better clot-stent interaction.