Histomorphometric analysis of the soleus muscle in different phases of ischemic stroke in an animal model / Análise histomorfométrica do músculo sóleo em diferentes fases do acidente vascular cerebral isquêmico em modelo animal

Objective: To analyze the muscle mass and cross-sectional area of the muscular fiber of the hemiparetic soleus in an animal model, in order to identify the muscular adaptations that occur in ischemic stroke.Method: Twelve Rattus norvegicus were divided into 2 groups: stroke group (n=6) and control group (n=6). Each group was subdivided into two subgroups, with evaluations at 7 days (CG7 and SG7) and 21 days (CG21 and SG21) after the accident. Their soleus muscles were removed for muscle mass analysis and cross-sectional area of the muscular fibers (CSAMF) measurement. The adopted statistical significance was 5%.Result: Significant differences in the muscle mass were observed between CG7 (0.120 ± 0.005 g) vs. SG7 (0.100 ± 0.004 g; p=0.035), and between CG21 (0.130 ± 0.010 g) vs. SG21 (0.078 ± 0.006; p=0.012). Significant differences in the relative muscle mass were observed between CG7 (0.044 ± 0.002 g) vs SG7 (0.039 ± 0.003; p=0.025), and CG21 (0.044 ± 0.003) vs. SG21 (0.028 ± 0.002; p=0.011). The CSAMF showed significant differences between CG7 (2,322 µm2 [2312-2453]) vs. SG7 (2,056 µm2 [2,022-2,135]; p=0.012), and CG21 (2,667 µm2 [2,692-2,845]) vs. SG21 (2,050 µm2 [2,034-2,161]; p=0.006).Conclusion: In this study in animal models of ischemic stroke, there was a significant loss of muscle mass, and this loss was accentuated in the longer term of the injury, highlighting the importance of future research on types of muscle fibers and applicability in human patients

Objetivo: Analisar a massa muscular e a área de secção transversal da fibra muscular do sóleo hemiparético em um modelo animal, a fim de identificar as adaptações musculares que ocorrem no acidente vascular cerebral isquêmico.Método: Doze Rattus norvegicus foram divididos em 2 grupos: grupo AVC (n=6) e grupo controle (n=6). Cada grupo foi subdividido em dois subgrupos, com avaliações aos 7 dias (CG7 e SG7) e 21 dias (CG21 e SG21) após o acidente. O músculo sóleo foi removido para análise de massa muscular e medição da área de secção transversal das fibras musculares (CSAMF). O nível de significância estatística adotado foi de 5%.Resultado: Diferenças significativas na massa muscular foram observadas entre CG7 (0,120 ± 0,005 g) vs. SG7 (0,100 ± 0,004 g; p=0,035), e entre CG21 (0,130 ± 0,010 g) vs. SG21 (0,078 ± 0,006; p=0,012). Diferenças significativas na massa muscular relativa foram observadas entre CG7 (0,044 ± 0,002 g) vs. SG7 (0,039 ± 0,003; p=0,025), e CG21 (0,044 ± 0,003) vs. SG21 (0,028 ± 0,002; p=0,011). A CSAMF mostrou diferenças significativas entre CG7 (2.322 µm2 [2.312-2.453]) vs. SG7 (2.056 µm2 [2.022-2.135]; p=0,012), e CG21 (2.667 µm2 [2.692-2.845]) vs. SG21 (2.050 µm2 [2.034-2.161]; p=0,006).Conclusão: Neste estudo em modelos animais de acidente vascular cerebral isquêmico, houve uma perda significativa de massa muscular, e essa perda foi acentuada no longo prazo da lesão, destacando a importância de futuras pesquisas sobre tipos de fibras musculares e aplicabilidade em pacientes humanos

Aspirin and clopidogrel resistance in Filipino patients with recurrent noncardioembolic ischemic strokes in a tertiary hospital: A cross-sectional study

Background@#Antiplatelet resistance is one factor that contributes to stroke recurrence among patients with noncardioembolic ischemic strokes. @*Objectives@#This paper aims to describe the prevalence of aspirin and clopidogrel resistance, along with frequency of statin, NSAID and proton pump inhibitor use among our cohort of stroke patients. Method. This is a single-center cross-sectional review that included all adult patients with recurrent noncardioembolic ischemic stroke admitted in a tertiary hospital between January 2019 and June 2023. @*Results@#A total of 1,374 patients were admitted for ischemic stroke from January 2019 to June 2023. Among these, 155 (11.28%) were recurrent noncardioembolic ischemic strokes. Prevalence of aspirin and clopidogrel resistance were 25% and 32.7%, respectively. Clinical profiles of those in the resistant group were comparable with those in the nonresistant group. None of the patients taking aspirin had concomitant use of nonsteroidal antiinflammatory drugs. Only 2 of the patients who were resistant to clopidogrel were on proton pump inhibitors. More than half of the patients both in the resistant and the nonresistant groups were on statin. The study had a small sample size and hence it was not enough to establish causal relationship between factors and antiplatelet resistance. @*Conclusion@#More patients were resistant to clopidogrel than to aspirin. Further studies with a bigger sample size are recommended to explore factors that contribute to antiplatelet resistance in Filipino patients.

Platelet Lymphocyte Ratio (PLR) as a predictor of in-hospital outcomes among Acute Ischemic Stroke (AIS) patients in a tertiary hospital

Introduction@#Acute Ischemic Stroke (AIS) is a medical emergency that affects people globally. In the Philippines, it remains as the third leading cause of mortality. This study aims to determine the use of platelet-lymphocyte ratio (PLR) - a simple, economical, and safe tool - as a predictor of in-hospital outcomes in patients with acute ischemic stroke.@*Methods@#A retrospective cross-sectional study was conducted among AIS patients at the Remedios Trinidad Romualdez Hospital (RTRH) Tacloban City, Leyte, Philippines from January 2020 to December 2022. Clinical demographics, laboratory profile, and hospital outcomes were described. Descriptive statistics, Mann-Whitney test, and T-test were utilized to determine the association between PLR and in-hospital outcomes.@*Results and Conclusions@#There were 76 patients enrolled in the study, majority were females (57.9%), and hypertensive (84.2%). Risk factors that are pivotal to the development of AIS were also identified. To note, half of the population presented with unilateral body weakness. Moreover, only 7.9% died due to the disease. Higher PLR levels resulted from an increased platelet count and a decreased lymphocyte count. However, no significant association between PLR levels and AIS outcomes was noted, hence the need for further investigation of these parameters.

Predictors for hemorrhagic transformation among patients with Ischemic stroke admitted in a Tertiary Hospital in the Philippines from July 2018-July 2019

Background@#Among the multiple scoring systems for hemorrhagic transformation, only few of these address spontaneous hemorrhagic transformation after an ischemic stroke, with most done with Western population data. @*Objectives@#This study aims to identify the predictors for hemorrhagic transformation among patients with ischemic stroke admitted in a tertiary hospital in Cebu City, Philippines.@*Methods@#This is a retrospective cohort study of patients with ischemic stroke admitted in a tertiary hospital in Cebu City. Patients’ baseline characteristics, clinical, and radiologic data were collected. Chi square test and t-test were used to determine which variables were significantly different between patients with and without hemorrhagic transformation. Odds ratio (OR) and 95% confidence interval (CI) were determined to measure the association between the different variables and hemorrhagic transformation. @*Results@#A total of 500 ischemic stroke patients were included in the study. There were 28 (6%) ischemic stroke patients with Hemorrhagic Transformation. The mean age of these patients is 66.93 ± 12.42 years, 48.8% male, 10.8% had atrial fibrillation, and 2.4% had myocardial infarction. Controlling for the effect of confounders, white blood cell count (OR 1.11; 95% CI 1.03-1.19), myocardial infarction (OR 5.25; 95% CI 1.13-24.34), and presence of brain edema (OR 2.86; 95% CI 1.05-7.80) were significant predictors of hemorrhagic transformation.@*Conclusion@#White blood cell count, presence of brain edema, and myocardial infarction were significantly associated with hemorrhagic transformation among ischemic stroke patients.

Single-Cell Mapping of Brain Myeloid Cell Subsets Reveals Key Transcriptomic Changes Favoring Neuroplasticity after Ischemic Stroke / 神经科学通报·英文版

Interactions between brain-resident and peripheral infiltrated immune cells are thought to contribute to neuroplasticity after cerebral ischemia. However, conventional bulk sequencing makes it challenging to depict this complex immune network. Using single-cell RNA sequencing, we mapped compositional and transcriptional features of peri-infarct immune cells. Microglia were the predominant cell type in the peri-infarct region, displaying a more diverse activation pattern than the typical pro- and anti-inflammatory state, with axon tract-associated microglia (ATMs) being associated with neuronal regeneration. Trajectory inference suggested that infiltrated monocyte-derived macrophages (MDMs) exhibited a gradual fate trajectory transition to activated MDMs. Inter-cellular crosstalk between MDMs and microglia orchestrated anti-inflammatory and repair-promoting microglia phenotypes and promoted post-stroke neurogenesis, with SOX2 and related Akt/CREB signaling as the underlying mechanisms. This description of the brain's immune landscape and its relationship with neurogenesis provides new insight into promoting neural repair by regulating neuroinflammatory responses.

Mortalité à long terme des survivants d'accidents vasculaires cérébraux ischémiques à Bobo Dioulasso, Burkina Faso / Long-term mortality of ischaemic stroke survivors in Bobo-Dioulasso, Burkina Faso

Contexte et objectif. La survie à long terme des accidents vasculaires cérébraux ischémiques (AVCI) reste un défi majeur. L'objectif de ce travail était d'analyser la mortalité à long terme des survivants d'AVCI. Méthodes. Il s'est agi d'une cohorte rétrospective portant sur les patients hospitalisés du 1er janvier 2017 au 31 décembre 2019, sortis vivants du service de neurologie au Centre Hospitalier Universitaire Sourô Sanou de Bobo-Dioulasso après un AVCI. Nous avons recouru aux méthodes de Kaplan Meier et la regression de Cox pour décrire respectivement la survie et les prédicteurs de la mortalité. Résultats. Au total, 87 patients dossiers ont été colligés. L'âge moyen était de 61,2 ans (±13,7). Le sex-ratio M/F était de 1,23/1. L'hypertension artérielle était le principal facteur de risque cardiovasculaire (65,5 %). Les antécédents de cardiopathies étaient présents chez 6 patients. La conscience était normale chez 82 patients et les complications de décubitus ont été observées chez 20 patients au cours de l'hospitalisation. La durée moyenne d'hospitalisation était de 15,8 jours. La mortalité cumulée en post hospitalisation était de 40,2 % à 4 ans. Les facteurs prédictifs de la mortalité étaient l'âge > 60 ans (p=0,008; HRa= 3,05 ; IC 95 % : 1,33-6,99), le score de Glasgow>9 (p<0,001; HRa = 0,09; IC 95 % : 0,02-0,31) et l'absence de complication de décubitus (p=0,009; HRa = 0,34; IC95 % : 0,15-0,76). Conclusion. Dans ce contexte, la mortalité à long terme des AVCI est élevée. Le renforcement du suivi vis-à-vis des groupes spécifiques pourrait contribuer à réduire considérablement cette mortalité à long terme.

Context and objective. Long-term survival from ischaemic stroke remains a major challenge. The aim of this study was to analyse the long-term mortality of stroke survivors at the Sourô Sanou University Hospital in Bobo-Dioulasso. Methods. This was a retrospective cohort of hospitalized patients from January 1, 2017 to December 31, 2019, discharged alive from the neurology service after ischaemic stroke. We used Kaplan Meier and Cox regression methods to describe survival and predictors of mortality, respectively. Results. A total of 87 patients were included in this study. The mean age was 61.2 years (±13.7). The sex ratio M/F was 1.23. Hypertension was the main cardiovascular risk factor (65.5%). A history of heart disease was present in 6 patients (6.9%). Consciousness was normal in 82 patients (94.2%) and decubitus complications were observed in 20 patients (23%) during hospitalisation. The average length of hospital stay was 15.8 days. Cumulative post-hospital mortality was 40.2% at 4 years. Factors predictive of mortality were age >60 years (p=0.008; aHR= 3.05; 95%CI: 1.33-6.99), Glasgow score>9 (p<0.001; aHR = 0.09; 95% CI: 0.02-0.31) and absence of decubitus complication (p=0.009; aHR = 0.34; 95%CI: 0.15-0.76). Conclusion. In this context, long-term mortality in ischaemic stroke is high. Closer monitoring of specific groups could help to reduce considerably this long-term mortality.

Enfermedad de pequeño vaso. Relación con deterioro funcional, cognitivo y afectivo en adultos mayores con enfermedad cerebrovascular / Small vessel disease. Relationship with functional, cognitive and affective impairment in elderly adults with cerebrovascular disease

INTRODUCCIÓN: La enfermedad cerebral de pequeño vaso es una causa principal de pérdida funcional, discapacidad y deterioro cognitivo. OBJETIVO: Determinar la prevalencia de la enfermedad de pequeño vaso y características clínicas que se asocian a mayor deterioro funcional, cognitivo y afectivo en adultos mayores con enfermedad cerebrovascular atendidos en el Servicio de Neurología del Hospital Carlos Andrade Marín en el período 2020 ­ 2021. METODOLOGÍA: Estudio observacional, analítico transversal con 80 pacientes mayores de 65 años con enfermedad cerebrovascular previamente diagnosticada. Se determinó cuáles presentaban enfermedad cerebral de pequeño vaso. Se compararon los dos grupos el de enfermedad cerebro vascular isquémico con y sin enfermedad cerebral de pequeño vaso. Se midió el grado de deterioro funcional con escala de Barthel; Lawton y Brody. El deterioro cognitivo con test de Montreal Cognitive Assessment ­Basic, estado afectivo con escala de Yesavage. Se utilizó razón de momios y se consideró significativo un valor p <0,05. Se utilizó el programa Statistical Package for Social Sciences versión 25. RESULTADOS: Los hombres representaron el 51,2%. La edad promedio fue 76,2 años. Prevalencia de enfermedad cerebral de pequeño vaso (87,5%). Escala de Fazekas grado 1 (46,3%), Factores asociados con enfermedad cerebral de pequeño vaso: tabaquismo [RR: 7,27; IC 95%: 1,69-31,3); enfermedad renal crónica [RR: 4,0; IC 95%: 1,01-15,7]. Dependencia moderada [RR: 6,42; IC 95%: 1,02-40,3]. Factores asociados con pérdida funcionalidad: gravedad del ictus. Factores asociados con deterioro cognitivo: infarto con doble territorio. Factores asociados con deterioro afectivo: infarto con doble territorio y síndrome metabólico (p<0,05). CONCLUSIÓN: La enfermedad cerebral de pequeño vaso tiene una elevada prevalencia entre los adultos mayores con enfermedad cerebrovascular y representó un deterioro cognitivo, funcional y afectivo considerable, en relación a los pacientes sin esta enfermedad.

INTRODUCTION: Cerebral small vessel disease is a leading cause of functional loss, disability, and cognitive impairment. OBJECTIVE: To determine the prevalence of small vessel disease and clinical characteristics associated with greater functional, cognitive and affective impairment in older adults with cerebrovascular disease attended at the Neurology Service of the Carlos Andrade Marín Hospital in the period 2020 - 2021. METHODOLOGY: Observational, analytical cross-sectional study with 80 patients over 65 years of age with previously diagnosed cerebrovascular disease. It was determined which patients had cerebral small vessel disease. The two groups of ischemic cerebrovascular disease with and without cerebral small vessel disease were compared. The degree of functional impairment was measured with the Barthel, Lawton and Brody scales. Cognitive impairment was measured with the Montreal Cognitive Assessment-Basic test, and affective state with the Yesavage scale. Odds ratio was used and a p value <0,05 was considered significant. Statistical Package for Social Sciences version 25 was used. RESULTS: Males represented 51,2%. Mean age was 76,2 years. Prevalence of cerebral small vessel disease (87,5%). Fazekas scale grade 1 (46,3%), Factors associated with cerebral small vessel disease: smoking [RR: 7,27; 95% CI: 1,69-31,3); chronic kidney disease [RR: 4,0; 95% CI: 1,01-15,7]. Moderate dependence [RR: 6,42; 95% CI: 1,02-40,3]. Factors associated with loss of function: severity of stroke. Factors associated with cognitive impairment: infarction with double territory. Factors associated with affective impairment: dual territory infarction and metabolic syndrome (p<0.05). CONCLUSION: Cerebral small vessel disease has a high prevalence among older adults with cerebrovascular disease and represented a considerable cognitive, functional and affective deterioration, in relation to patients without this disease.

Angioedema after rt-PA infusion led to airway emergency: a case report of rescue treatment with fresh frozen plasma

Abstract The authors report the case of a 71-year-old woman presented to the Emergency Department with acute ischemic stroke. She was treated with rt-PA and interventional endovascular revascularization and developed rapidly progressing angioedema that led to emergency intubation. The standard treatment was not very effective and the swelling improved after infusion of fresh frozen plasma. Angioedema after rt-PA infusion could be a life-threatening emergency that requires quick airway management by skilled professionals. As this condition is triggered by several factors, such as unregulated histamine and bradykinin production, the traditional treatment recommended by the guidelines may not be sufficient and the use of FFP can be considered as a safe and valuable aid.