Effect of Imaging Selection Paradigms on Endovascular Thrombectomy Outcomes in Patients With Acute Ischemic Stroke.

BACKGROUND: The effect of imaging selection paradigms on endovascular thrombectomy outcomes in patients with acute ischemic stroke with large vessel occlusion remains uncertain. The study aimed to assess the effect of basic imaging (noncontrast computed tomography with or without computed tomographic angiography) versus advanced imaging (magnetic resonance imaging or computed tomography perfusion) on clinical outcomes following thrombectomy in patients with stroke with large vessel occlusion in the early and extended windows using a pooled analysis of patient-level data from 2 pivotal randomized clinical trials done in China. METHODS: This post hoc analysis used data from 1182 patients included in 2 multicenter, randomized controlled trials in China that evaluated adjunct therapies to endovascular treatment for acute ischemic stroke (Direct Endovascular Treatment for Large Artery Anterior Circulation Stroke performed from May 20, 2018, through May 2, 2020, and Intravenous Tirofiban Before Endovascular Treatment in Stroke from October 10, 2018, through October 31, 2021). Patients with occlusion of the intracranial internal carotid artery or proximal middle cerebral artery (M1/M2 segments) were categorized according to baseline imaging modality (basic versus advanced) as well as treatment time window (early, 0-6 hours versus extended, 6-24 hours from last known well to puncture). The primary outcome was the proportion of patients with functional independence (modified Rankin Scale score of 0-2) at 90 days. Multivariable Poisson regression analysis was performed to determine the association between imaging selection modality and outcomes after endovascular treatment at each time windows. RESULTS: A total of 1182 patients were included in this cohort analysis, with 648 in the early (471 with basic imaging versus 177 advanced imaging) and 534 in the extended (222 basic imaging versus 312 advanced imaging) time window. There were no differences in 90-day functional independence between the advanced and basic imaging groups in either time windows (early window: adjusted relative risk, 0.99 [95% CI, 0.84-1.16]; P=0.91; extended window: adjusted relative risk, 1.00 [95% CI, 0.84-1.20]; P=0.97). CONCLUSIONS: In this post hoc analysis of 2 randomized clinical trial pooled data involving patients with large vessel occlusion stroke, an association between imaging selection modality and clinical or safety outcomes for patients undergoing thrombectomy in either the early or extended windows was not detected. Our study adds to the growing body of literature on simpler imaging paradigms to assess thrombectomy eligibility across both the early and extended time windows. REGISTRATION: URL: http://www.chictr.org.cn; Unique identifiers: ChiCTR-IOR-17013568 and ChiCTR-INR-17014167.

One-Year Outcome After Endovascular Treatment for Acute Basilar Artery Occlusion.

BACKGROUND AND PURPOSE: The BASILAR registry, a nationwide prospective nonrandomized study conducted in China, enrolled consecutive patients with acute basilar artery occlusion receiving endovascular treatment or conventional-treatment from January 2014 to May 2019. This article aimed to report the results of clinical follow-up at one year among these patients. METHODS: The primary outcome was the modified Rankin Scale at one year, assessed as a common odds ratio using ordinal logistic regression analysis adjusted for prespecified prognostic factors. Secondary outcomes included the modified Rankin Scale-based outcome group at one year (0-1, 0-2, or 0-3) and all-cause death. RESULTS: Of the 829 patients enrolled in the original BASILAR registry, one-year data were available for 785 patients (94.7%). The distribution of outcomes on the modified Rankin Scale favored endovascular treatment over conventional-treatment (adjusted common odds ratio, 4.50 [95% CI, 2.81-7.29]; P<0.001). The cumulative one-year mortality rate was 54.6% in the endovascular treatment group versus 83.5% in the conventional-treatment group (adjusted odds ratio, 4.36 [95% CI, 2.69-7.29]; P<0.001). CONCLUSIONS: The beneficial effect of endovascular treatment on functional outcome at one year in patients with acute basilar artery occlusion is similar to that reported at 90 days in the original study. REGISTRATION: URL: http://www.chictr.org.cn; Unique identifier: ChiCTR1800014759.

The role of intravenous thrombolysis before mechanical Thrombectomy: A subgroup analysis of the RESILIENT trial.

BACKGROUND: Randomized trials have recently evaluated the non-inferiority of direct thrombectomy versus intravenous thrombolysis (IVT) followed by endovascular therapy in anterior circulation large vessel occlusion (LVO) stroke in patients eligible for IVT within 4.5 h from stroke onset with controversial results. We aimed to assess the effect of IVT on the clinical outcome of mechanical thrombectomy (MT) in the RESILIENT trial. METHODS: RESILIENT was a randomized, prospective, multicenter, controlled trial assessing the safety and efficacy of thrombectomy versus medical treatment alone. A total of 221 patients were enrolled. The trial showed a substantial benefit of MT when added to medical management. All eligible patients received intravenous tPA within the 4.5-h-window. Ordinal logistic and binary regression analyses using intravenous tPA as an interaction term were performed with adjustments for potential confounders, including age, baseline NIHSS score, occlusion site, and ASPECTS. A p-value <0.05 was considered statistically significant. RESULTS: Among 221 randomized patients (median NIHSS, 18 IQR [14-21]), 155 (70%) were treated with IVT. There was no difference in the mRS ordinal shift and frequency of functional independence between patients who received or not IV tPA; the odds ratio for the ordinal mRS shift was 2.63 [1.48-4.69] for the IVT group and 1.54 [0.63-3.74] for the no IVT group, with a p-value of 0.42. IVT also did not affect the frequency of good recanalization (TICI 2b or higher) and hemorrhagic transformation. CONCLUSIONS: The large effect size of MT on LVO outcomes was not significantly affected by IVT. TRIAL REGISTRATION: RESILIENT ClinicalTrials.gov number, NCT02216643.

Reperfusion therapy for acute ischemic stroke: where are we in 2023?

Over the last three decades, stroke care has undergone significant transformations mainly driven by the introduction of reperfusion therapy and the organization of systems of care. Patients receiving treatment through a well-structured stroke service have a much higher chance of favorable outcomes, thereby decreasing both disability and mortality. In this article, we reviewed the scientific evidence for stroke reperfusion therapy, including thrombolysis and thrombectomy, and its implementation in the public health system in Brazil.

Nas últimas três décadas, o tratamento do AVC sofreu transformações significativas, impulsionadas principalmente pela introdução das terapias de reperfusão e pela organização dos serviços de AVC. Os pacientes que recebem tratamento em um serviço de AVC bem estruturado têm uma probabilidade muito maior de resultados favoráveis, diminuindo assim a incapacidade funcional e a mortalidade. Neste artigo, revisamos as evidências científicas para as terapias de reperfusão do AVC, incluindo trombólise e trombectomia e sua implementação no sistema público de saúde no Brasil.

FAST-ED scale for prehospital triage of large vessel occlusion: results in the field.

BACKGROUND: Acute ischemic stroke (AIS) is an extremely time-sensitive condition. The field triage of stroke patients should consider a careful balance between the best destination for the timely delivery of intravenous and/or endovascular reperfusion therapies. The Field Assessment Stroke Triage for Emergency Destination (FAST-ED) scale has been shown to have an accuracy comparable to that of the National Institutes of Health Stroke Scale (NIHSS). However, it has not been tested in the field. OBJECTIVE: To evaluate the accuracy of the FAST-ED scale in the detection of AIS due to large vessel occlusion (LVO) in the prehospital setting. METHODS: A cross-sectional study of consecutive prospective data collected from February 2017 to May 2019 in the city of Porto Alegre, state of Rio Grande do Sul, Southern Brazil, correlating the prehospital FAST-ED scale scores with the hospital diagnosis of LVO. Area under the curve (AUC), sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) were calculated. RESULTS: In total, 74 patients were included in the analysis. As compared with the diagnosis of LVO upon hospital discharge, the prehospital FAST-ED scale applied by paramedics had a sensitivity of 80%, a specificity of 47.7%, a PPV of 51.1%, an NPV of 77.8%, and an AUC of 0.68 (95% confidence interval [95%CI]: 0.55-0.80). Among the patients with a final diagnosis of AIS, the accuracy was higher, with an AUC of 0.75 (95%CI: 0.60-0.89), a sensitivity of 80%, a specificity of 60%, a PPV of 80%, and an NPV of 60%. CONCLUSIONS: In the present study, the FAST-ED scale, which was applied by paramedics in the field, demonstrated moderate accuracy but high sensitivity and NPV, which are essential attributes for a triage scale. While larger studies are still needed, these findings further support the use of the FAST-ED in stroke triage.

ANTECEDENTES: O acidente vascular cerebral isquêmico (AVCI) é uma doença altamente dependente do tempo. A triagem de pacientes com AVCI na cena deve considerar um equilíbrio cuidadoso entre o melhor destino para a administração rápida de terapias de reperfusão intravenosas e/ou endovasculares. Já foi demonstrado que a escala de Avaliação de campo de triagem de AVC para destino de emergência (Field Assessment Stroke Triage for Emergency Destination, FAST-ED, em inglês) tem precisão comparável à da Escala de AVC dos Institutos Nacionais de Saúde dos Estados Unidos (National Institutes of Health Stroke Scale, NIHSS, em inglês). Entretanto, a FAST-ED não foi testada em campo. OBJETIVO: Avaliar a acurácia da escala FAST-ED na detecção de AVCI por oclusão de grande vaso (OGV) no contexto pré-hospitalar. MéTODOS: Estudo transversal de dados prospectivos consecutivos, coletados de fevereiro de 2017 a maio de 2019, em Porto Alegre, Rio Grande do Sul, Brasil, em que se correlacionam a pontuação pré-hospitalar na escala FAST-ED e o diagnóstico hospitalar de OGV. A área sob a curva (ASC), a sensibilidade, a especificidade, o valor preditivo positivo (VPP), e o valor preditivo negativo (VPN) foram calculados. RESULTADOS: Ao todo, 74 pacientes foram incluídos na análise. Comparada ao diagnóstico de OGV na alta hospitalar, a escala FAST-ED aplicada em campo por profissionais do pré-hospitalar teve sensibilidade de 80%, especificidade de 47,7%, VPP de 51,1%, VPN de 77,8%, e ASC de 0,68 (intervalo de confiança de 95% [IC95%]: 0,55­0,80). Entre pacientes com diagnóstico final de AVCI, a precisão foi mais alta, com ASC de 0,75 (IC95%: 0,60­0,89), sensibilidade de 80%, especificidade de 60%, VPP de 80%, e VPN de 60%. CONCLUSõES: Neste estudo, a escala FAST-ED, aplicada por profissionais do pré-hospitalar em campo, demonstrou precisão moderada, com alta sensibilidade e VPN, atributos essenciais para uma escala de triagem. Embora estudos com amostras maiores ainda sejam necessários, estes achados apoiam o uso da FAST-ED na triagem de AVCI.

Unfavorable Vascular Anatomy during Endovascular Treatment of Stroke: Challenges and Bailout Strategies.

The benefit of mechanical thrombectomy (MT) in acute ischemic stroke (AIS) due to large vessel intracranial occlusions is directly related to the technical success of the procedures in achieving fast and complete reperfusion. While a precise definition of refractoriness is lacking in the literature, it may be considered when there is reperfusion failure, long procedural times, or high number of passes with the MT devices. Detailed knowledge about the causes for refractory MT in AIS is limited; however, it is most likely a multifaceted problem including factors related to the vascular anatomy and the underlying nature of the occlusive lesion amongst other factors. We aim to review the impact of several key unfavorable anatomical factors that may be encountered during endovascular AIS treatment and discuss potential bail-out strategies to these challenging situations.

Management of acute stroke and urgent neurointerventional procedures during COVID-19 pandemic: recommendations on the Scientific Department on Cerebrovascular Diseases of the Brazilian Academy of Neurology, Brazilian Society of Cerebrovascular Diseases and Brazilian Society of Neuroradiology.

INTRODUCTION: Although the 2019 severe acute respiratory syndrome coronavirus 2 infection (SARS-CoV-2, COVID-19) pandemic poses new challenges to the healthcare system to provide support for thousands of patients, there is special concern about common medical emergencies, such as stroke, that will continue to occur and will require adequate treatment. The allocation of both material and human resources to fight the pandemic cannot overshadow the care for acute stroke, a time-sensitive emergency that with an inefficient treatment will further increase mortality and long-term disability. OBJECTIVE: This paper summarizes the recommendations from the Scientific Department on Cerebrovascular Diseases of the Brazilian Academy of Neurology, the Brazilian Society of Cerebrovascular Diseases and the Brazilian Society of Neuroradiology for management of acute stroke and urgent neuro-interventional procedures during the COVID-19 pandemic, including proper use of screening tools, personal protective equipment (for patients and health professionals), and patient allocation.

Effective glycemic control with aggressive hyperglycemia management is associated with improved outcome in aneurysmal subarachnoid hemorrhage.

BACKGROUND AND PURPOSE: Hyperglycemia strongly predicts poor outcome in patients with aneurysmal subarachnoid hemorrhage, but the effect of hyperglycemia management on outcome is unclear. We studied the impact of glycemic control on outcome of patients with aneurysmal subarachnoid hemorrhage. METHODS: A prospective intensive care unit database was used to identify 332 patients with hyperglycemic aneurysmal subarachnoid hemorrhage admitted between January 2000 and December 2006. Patients treated with an aggressive hyperglycemia management (AHM) protocol after 2003 (N=166) were compared with 166 patients treated using a standard hyperglycemia management before 2003. Within the AHM group, outcome was compared between patients who achieved good (mean glucose burden <1.1 mmol/L) and poor (mean glucose burden >or=1.1 mmol/L) glycemic control. Poor outcome was defined as modified Rankin scale >or=4 at 3 to 6 months. Multivariable logistic regression models correcting for temporal trend were used to quantify the effect of AHM on poor outcome. RESULTS: Poor outcome in AHM-treated patients was lower (28.31% versus 40.36%) but was not statistically significant after correcting for temporal trend. However, good glycemic control significantly reduced the incidence of poor outcome (OR, 0.25; 95% CI, 0.08 to 0.80; P=0.02) compared with patients with poor glycemic control within the AHM group. No difference in the rate of clinical vasospasm or the development of delayed ischemic neurological deficit was seen before and after AHM protocol implementation. CONCLUSIONS: AHM results in good glucose control and significantly reduces the odds for poor outcome after aneurysmal subarachnoid hemorrhage in glucose-controlled patients. Further studies are needed to confirm these results.

Reperfusion therapy for acute ischemic stroke: where are we in 2023? / Terapia de reperfusão para o acidente vascular isquêmico agudo: onde estamos em 2023?

Abstract Over the last three decades, stroke care has undergone significant transformations mainly driven by the introduction of reperfusion therapy and the organization of systems of care. Patients receiving treatment through a well-structured stroke service have a much higher chance of favorable outcomes, thereby decreasing both disability and mortality. In this article, we reviewed the scientific evidence for stroke reperfusion therapy, including thrombolysis and thrombectomy, and its implementation in the public health system in Brazil.

Resumo Nas últimas três décadas, o tratamento do AVC sofreu transformações significativas, impulsionadas principalmente pela introdução das terapias de reperfusão e pela organização dos serviços de AVC. Os pacientes que recebem tratamento em um serviço de AVC bem estruturado têm uma probabilidade muito maior de resultados favoráveis, diminuindo assim a incapacidade funcional e a mortalidade. Neste artigo, revisamos as evidências científicas para as terapias de reperfusão do AVC, incluindo trombólise e trombectomia e sua implementação no sistema público de saúde no Brasil.

FAST-ED scale for prehospital triage of large vessel occlusion: results in the field / Escala FAST-ED para a triagem pré-hospitalar de oclusão de grande vaso: resultados de campo

Abstract Background Acute ischemic stroke (AIS) is an extremely time-sensitive condition. The field triage of stroke patients should consider a careful balance between the best destination for the timely delivery of intravenous and/or endovascular reperfusion therapies. The Field Assessment Stroke Triage for Emergency Destination (FAST-ED) scale has been shown to have an accuracy comparable to that of the National Institutes of Health Stroke Scale (NIHSS). However, it has not been tested in the field. Objective To evaluate the accuracy of the FAST-ED scale in the detection of AIS due to large vessel occlusion (LVO) in the prehospital setting. Methods A cross-sectional study of consecutive prospective data collected from February 2017 to May 2019 in the city of Porto Alegre, state of Rio Grande do Sul, Southern Brazil, correlating the prehospital FAST-ED scale scores with the hospital diagnosis of LVO. Area under the curve (AUC), sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) were calculated. Results In total, 74 patients were included in the analysis. As compared with the diagnosis of LVO upon hospital discharge, the prehospital FAST-ED scale applied by paramedics had a sensitivity of 80%, a specificity of 47.7%, a PPV of 51.1%, an NPV of 77.8%, and an AUC of 0.68 (95% confidence interval [95%CI]: 0.55-0.80). Among the patients with a final diagnosis of AIS, the accuracy was higher, with an AUC of 0.75 (95%CI: 0.60-0.89), a sensitivity of 80%, a specificity of 60%, a PPV of 80%, and an NPV of 60%. Conclusions In the present study, the FAST-ED scale, which was applied by paramedics in the field, demonstrated moderate accuracy but high sensitivity and NPV, which are essential attributes for a triage scale. While larger studies are still needed, these findings further support the use of the FAST-ED in stroke triage.

Resumo Antecedentes O acidente vascular cerebral isquêmico (AVCI) é uma doença altamente dependente do tempo. A triagem de pacientes com AVCI na cena deve considerar um equilíbrio cuidadoso entre o melhor destino para a administração rápida de terapias de reperfusão intravenosas e/ou endovasculares.Jáfoi demonstrado que a escala deAvaliação de campo de triagem de AVC para destino de emergência (Field Assessment Stroke Triage for Emergency Destination, FAST-ED, em inglês) tem precisão comparável à da Escala de AVC dos Institutos Nacionais de Saúde dos Estados Unidos (National Institutes of Health Stroke Scale, NIHSS, em inglês). Entretanto, a FAST-ED não foi testada em campo. Objetivo Avaliar a acurácia da escala FAST-ED na detecção de AVCI por oclusão de grande vaso (OGV) no contexto pré-hospitalar. Métodos Estudo transversal de dados prospectivos consecutivos, coletados de fevereiro de 2017 a maio de 2019, em Porto Alegre, Rio Grande do Sul, Brasil, em que se correlacionam a pontuação pré-hospitalar na escala FAST-ED e o diagnóstico hospitalar de OGV. A área sob a curva (ASC), a sensibilidade, a especificidade, o valor preditivo positivo (VPP), e o valor preditivo negativo (VPN) foram calculados. Resultados Ao todo, 74 pacientes foram incluídosnaanálise. Comparada aodiagnóstico de OGV na alta hospitalar, a escala FAST-ED aplicada em campo por profissionais do préhospitalar teve sensibilidadede80%, especificidadede47,7%, VPPde51,1%, VPN de 77,8%, e ASC de 0,68 (intervalo de confiança de 95% [IC95%]: 0,55-0,80). Entre pacientes com diagnóstico final de AVCI, a precisão foi mais alta, com ASC de 0,75 (IC95%: 0,60-0,89), sensibilidade de 80%, especificidade de 60%, VPP de 80%, e VPN de 60%. Conclusões Neste estudo, a escala FAST-ED, aplicada por profissionais do pré-hospitalar em campo, demonstrou precisão moderada, com alta sensibilidade e VPN, atributos essenciaispara umaescaladetriagem.Embora estudoscomamostras maiores ainda sejam necessários, estes achados apoiam o uso da FAST-ED na triagem de AVCI.

Management of acute stroke and urgent neurointerventional procedures during COVID-19 pandemic: recommendations on the Scientific Department on Cerebrovascular Diseases of the Brazilian Academy of Neurology, Brazilian Society of Cerebrovascular Diseases and Brazilian Society of Neuroradiology / Tratamento do acidente vascular cerebral agudo e realização de procedimentos de neurointervenção urgentes durante a pandemia de COVID-19: recomendações do Departamento Científico de Doenças Cerebrovasculares da Academia Brasileira de Neurologia, Sociedade Brasileira de Doenças Cerebrovasculares e Sociedade Brasileira de Neurorradiologia

ABSTRACT Introduction: Although the 2019 severe acute respiratory syndrome coronavirus 2 infection (SARS-CoV-2, COVID-19) pandemic poses new challenges to the healthcare system to provide support for thousands of patients, there is special concern about common medical emergencies, such as stroke, that will continue to occur and will require adequate treatment. The allocation of both material and human resources to fight the pandemic cannot overshadow the care for acute stroke, a time-sensitive emergency that with an inefficient treatment will further increase mortality and long-term disability. Objective: This paper summarizes the recommendations from the Scientific Department on Cerebrovascular Diseases of the Brazilian Academy of Neurology, the Brazilian Society of Cerebrovascular Diseases and the Brazilian Society of Neuroradiology for management of acute stroke and urgent neuro-interventional procedures during the COVID-19 pandemic, including proper use of screening tools, personal protective equipment (for patients and health professionals), and patient allocation.

RESUMO Introdução: A pandemia causada pelo novo coronavírus da síndrome respiratória aguda grave 2 (SARS-CoV-2, COVID-19) apresenta novos e importantes desafios à gestão de saúde no Brasil. Além da difícil missão de prestar atendimento aos milhares de pacientes infectados pelo COVID-19, os sistemas de saúde têm que manter a assistência às emergências médicas comuns em períodos sem pandemia, tais como o acidente vascular cerebral (AVC), que continuam ocorrendo e requerem tratamento com presteza e eficiência. A alocação de recursos materiais e humanos para o enfrentamento à pandemia não pode comprometer o atendimento ao AVC agudo, uma emergência cujo tratamento é tempo-dependente e se não realizado implica em importante impacto na mortalidade e incapacitação a longo prazo. Objetivo: Este trabalho resume as recomendações do Departamento Científico de Doenças Cerebrovasculares da Academia Brasileira de Neurologia, da Sociedade Brasileira de Doenças Cerebrovasculares e da Sociedade Brasileira de Neurorradiologia para o tratamento do AVC agudo e para a realização de procedimentos de neurointervenção urgentes durante a pandemia de COVID-19, incluindo o uso adequado de ferramentas de triagem e equipamentos de proteção pessoal (para pacientes e profissionais de saúde), além da alocação apropriada de pacientes.

Stenting of complete vertebral artery ostial occlusion in a patient with medically refractory vertebrobasilar ischemia.

The case history is described of a man in his late 50s who presented with recurrent vertebrobasilar ischemic events despite maximal medical treatment in the setting of a complete left vertebral artery ostial occlusion. The complete occlusion was successfully treated with a drug-eluting stent. The patient has been symptom-free for 6 months. Stenting of vertebral artery ostial occlusion is technically feasible in well-selected cases.