9 research outputs found

    Neurovascular intervention in the acute phase of cerebral infarction

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    Background and purpose: Endovascular therapies in acute ischaemic stroke may offer benefits to patients that are not eligible for standard use of intravenous tissue activator plasminogen (iv t-PA) or when this is not effective. Our aim is to present the initial experience in with endovascular techniques in the Community of Madrid. Methods: We present data from our registry of acute ischaemic strokes treated with endovascular re-perfusion therapies in five University Hospitals in Madrid (Spain) during the period 2005–2009. We recorded demographic data, vascular risk factors, risk severity with the NIHSS (National Institute of Health Stroke Scale), endovascular techniques, complications and mortality rates. Functional outcome and neurological disability at 90 days was defined by the modified Rankin scale (mRs). Results: A total of 41 patients were treated with endovascular therapies. Mean age was 58.6 ± 19.9, and 56.1% were males. Of those 22 patients had an anterior circulation stroke and 19 had a posterior circulation stroke. Baseline NIHSS score was: median, 17 [range, 2–34]; 7 patients had previously received IV t-PA. The following endovascular techniques were performed: mechanical disruption (26 patients), intra-arterial infusion of t-PA (26 patients), angioplasty and stenting (5 patients), mechanical use of MERCI device (3 patients). Partial or total re-canalization was achieved in 32 patients (78%). Only one patient had a symptomatic cerebral haemorrhage. Three months after stroke, 53.6% of the patients were independent (mRs = 2) and overall mortality rate was 19.5%. Conclusions: Acute ischaemic stroke is a potentially treatable medical emergency within the first hours after the onset of symptoms. Stroke endovascular procedures constitute an alternative for patients with IV t-PA exclusion criteria or when this is not effective. Resumen: Introducción y objetivos: El intervencionismo neurovascular (INV) en la fase aguda del ictus isquémico es una alternativa válida en los casos en que la trombólisis intravenosa está contraindicada o cuando no ha sido efectiva. Nuestro objetivo es presentar la experiencia inicial del INV en la Comunidad de Madrid. Métodos: Registro prospectivo de ictus isquémicos tratados con INV en la Comunidad de Madrid (2005–2009). Se recogen variables epidemiológicas, factores de riesgo y gravedad del ictus mediante la NIHSS (National Institute of Health Stroke Scale). Registramos el tipo de técnica, la situación funcional a los 3 meses, mediante la escala de Rankin modificada (eRm), complicaciones hemorrágicas y mortalidad. Resultados: Se incluyó a 41 pacientes. La media±desviación estándar de edad fue 58,6 ± 19,9 años; el 56,1%, varones. Hubo 22 pacientes con ictus de circulación anterior y 19, de circulación posterior. La mediana de la puntuación NIHSS basal fue 17 [intervalo, 2–34]; 7 pacientes recibieron trombólisis intravenosa previa. Las técnicas utilizadas fueron: interrupción mecánica (26 pacientes), trombólisis intraarterial (26 pacientes), angioplastia/ stent (5 pacientes), extracción mecánica mediante dispositivo MERCI (Mechanical Embolus Removal in Cerebral Ischemia) (3 pacientes). Se consiguió una recanalización parcial o total en 32 pacientes (78%). Un paciente presentó una transformación hemorrágica sintomática (2,4%). Al cabo de 3 meses el 53,6% de los pacientes eran independientes (eRm = 2) y la mortalidad general fue del 19,5%. Conclusiones: El ictus isquémico es una emergencia médica tratable en las primeras horas. El INV es una alternativa terapéutica factible y útil en los casos de contraindicación o ineficacia de la trombólisis intravenosa. Keywords: Ischaemic stroke, Thrombolysis, Endovascular procedures, Cerebral infarction, Intra-arterial thrombolysis, Tissue plasminogen activator, Palabras clave: Ictus isquémico, Trombólisis, Intervencionismo neurovascular, Infarto cerebral, Trombólisis intraarterial, Activador del plasminógeno tisula

    Intervencionismo neurovascular en la fase aguda del infarto cerebral

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    Resumen: Introducción y objetivos: El intervencionismo neurovascular (INV) en la fase aguda del ictus isquémico es una alternativa válida en los casos en que la trombólisis intravenosa está contraindicada o cuando no ha sido efectiva. Nuestro objetivo es presentar la experiencia inicial del INV en la Comunidad de Madrid. Métodos: Registro prospectivo de ictus isquémicos tratados con INV en la Comunidad de Madrid (2005-2009). Se recogen variables epidemiológicas, factores de riesgo y gravedad del ictus mediante la NIHSS (National Institute of Health Stroke Scale). Registramos el tipo de técnica, la situación funcional a los 3 meses, mediante la escala de Rankin modificada (eRm), complicaciones hemorrágicas y mortalidad. Resultados: Se incluyó a 41 pacientes. La media ± desviación estándar de edad fue 58,6 ± 19,9 años; el 56,1%, varones. Hubo 22 pacientes con ictus de circulación anterior y 19, de circulación posterior. La mediana de la puntuación NIHSS basal fue 17 [intervalo, 2-34]; 7 pacientes recibieron trombólisis intravenosa previa. Las técnicas utilizadas fueron: interrupción mecánica (26 pacientes), trombólisis intraarterial (26 pacientes), angioplastia/stent (5 pacientes), extracción mecánica mediante dispositivo MERCI (Mechanical Embolus Removal in Cerebral Ischemia) (3 pacientes). Se consiguió una recanalización parcial o total en 32 pacientes (78%). Un paciente presentó una transformación hemorrágica sintomática (2,4%). Al cabo de 3 meses el 53,6% de los pacientes eran independientes (eRm ≤ 2) y la mortalidad general fue del 19,5%. Conclusiones: El ictus isquémico es una emergencia médica tratable en las primeras horas. El INV es una alternativa terapéutica factible y útil en los casos de contraindicación o ineficacia de la trombólisis intravenosa. Abstract: Background and purpose: Endovascular therapies in acute ischaemic stroke may offer benefits to patients that are not eligible for standard use of intravenous tissue activator plasminogen (iv t-PA) or when this is not effective. Our aim is to present the initial experience in with endovascular techniques in the Community of Madrid. Methods: We present data from our registry of acute ischaemic strokes treated with endovascular re-perfusion therapies in five University Hospitals in Madrid (Spain) during the period 2005-2009. We recorded demographic data, vascular risk factors, risk severity with the NIHSS (National Institute of Health Stroke Scale), endovascular techniques, complications and mortality rates. Functional outcome and neurological disability at 90 days was defined by the modified Rankin scale (mRs). Results: A total of 41 patients were treated with endovascular therapies. Mean age was 58.6 ± 19.9, and 56.1% were males. Of those 22 patients had an anterior circulation stroke and 19 had a posterior circulation stroke. Baseline NIHSS score was: median, 17 [range, 2-34]; 7 patients had previously received iv t-PA. The following endovascular techniques were performed: mechanical disruption (26 patients), intra-arterial infusion of t-PA (26 patients), angioplasty and stenting (5 patients), mechanical use of MERCI device (3 patients). Partial or total re-canalization was achieved in 32 patients (78%). Only one patient had a symptomatic cerebral haemorrhage. Three months after stroke, 53.6% of the patients were independent (mRs ≤ 2) and overall mortality rate was 19.5%. Conclusions: Acute ischaemic stroke is a potentially treatable medical emergency within the first hours after the onset of symptoms. Stroke endovascular procedures constitute an alternative for patients with iv t-PA exclusion criteria or when this is not effective. Palabras clave: Ictus isquémico, Trombólisis, Intervencionismo neurovascular, Infarto cerebral, Trombólisis intraarterial, Activador del plasminógeno tisular, Keywords: Ischaemic stroke, Thrombolysis, Endovascular procedures, Cerebral infarction, Intra-arterial thrombolysis, Tissue plasminogen activato

    Landscape and soil regionalization in southern Brazilian Amazon and contiguous areas: methodology and relevance for ecological studies

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    Soils of a large tropical area with differentiated landscapes cannot be treated uniformly for ecological applications. We intend to develop a framework based on physiography that can be used in regional applications. The study region occupies more than 1.1 million km² and is located at the junction of the savanna region of Central Brazil and the Amazon forest. It includes a portion of the high sedimentary Central Brazil plateau and large areas of mostly peneplained crystalline shield on the border of the wide inner-Amazon low sedimentary plain. A first broad subdivision was made into landscape regions followed by a more detailed subdivision into soil regions. Mapping information was extracted from soil survey maps at scales of 1:250000-1:500000. Soil units were integrated within a homogenized legend using a set of selected attributes such as taxonomic term, the texture of the B horizon and the associated vegetation. For each region, a detailed inventory of the soil units with their area distribution was elaborated. Ten landscape regions and twenty-four soil regions were recognized and delineated. Soil cover of a region is normally characterized by a cluster composed of many soil units. Soil diversity is comparable in the landscape and the soil regions. Composition of the soil cover is quantitatively expressed in terms of area extension of the soil units. Such geographic divisions characterized by grouping soil units and their spatial estimates must be used for regional ecological applications

    Guidelines for the treatment of acute ischaemic stroke

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    Introduction: Update of Acute Ischaemic Stroke Treatment Guidelines of the Spanish Neurological Society based on a critical review of the literature. Recommendations are made based on levels of evidence from published data and studies. Development: Organised systems of care should be implemented to ensure access to the optimal management of all acute stroke patients in stroke units. Standard of care should include treatment of blood pressure (should only be treated if values are over 185/105 mmHg), treatment of hyperglycaemia over 155 mg/dl, and treatment of body temperature with antipyretic drugs if it rises above 37.5 °C. Neurological and systemic complications must be prevented and promptly treated. Decompressive hemicraniectomy should be considered in cases of malignant cerebral oedema. Intravenous thrombolysis with rtPA should be administered within 4.5 hours from symptom onset, except when there are contraindications. Intra-arterial pharmacological thrombolysis can be considered within 6 hours, and mechanical thrombectomy within 8 hours from onset, for anterior circulation strokes, while a wider window of opportunity up to 12–24 hours is feasible for posterior strokes. There is not enough evidence to recommend routine use of the so-called neuroprotective drugs. Anticoagulation should be administered to patients with cerebral vein thrombosis. Rehabilitation should be started as early as possible. Conclusion: Treatment of acute ischaemic stroke includes management of patients in stroke units. Systemic thrombolysis should be considered within 4.5 hours from symptom onset. Intra-arterial approaches with a wider window of opportunity can be an option in certain cases. Protective and restorative therapies are being investigated. Resumen: Introducción: Actualización de la guía para el tratamiento del infarto cerebral agudo de la Sociedad Española de Neurología basada en la revisión y análisis de la bibliografía existente sobre el tema. Se establecen recomendaciones en base al nivel de evidencia que ofrecen los estudios revisados. Desarrollo: Los sistemas de asistencia urgente extrahospitalaria se organizarán para asegurar la atención especializada de los pacientes y el ingreso en unidades de ictus (UI). Deben aplicarse cuidados generales para mantener la homeostasis (tratar la tensión arterial sistólica > 185 mmHg o diastólica > 105 mmHg, evitar hiperglucemia > 155 mg/dl y controlar la temperatura, tratando con antitérmicos cifras > 37,5 °C), y prevenir y tratar las complicaciones. La craniectomía descompresiva debe ser considerada en casos seleccionados de oedema cerebral maligno. La trombólisis intravenosa con rtPA se administrará en las primeras 4,5 horas en pacientes sin contraindicación. La trombólisis intraarterial farmacológica puede indicarse en las primeras 6 horas de evolución y la trombectomía mecánica hasta las 8 horas. En el territorio posterior la ventana puede ampliarse hasta 12–24 horas. No hay evidencias para recomendar el uso rutinario de los fármacos denominados neuroprotectores. Se recomienda la anticoagulación en pacientes con trombosis de senos venosos. Se aconseja el inicio precoz de rehabilitación. Conclusiones: El tratamiento del infarto cerebral se basa en la atención especializada en UI, la aplicación urgente de cuidados generales y el tratamiento trombolítico intravenoso en las primeras 4,5 horas. La recanalización intraarterial farmacológica o mecánica pueden ser útiles en casos seleccionados. Terapias de protección y reparación cerebral están en desarrollo. Keywords: Cerebral infarct, Ischaemic stroke, Thrombolysis, Brain protection, Stroke units, Cerebral venous thrombosis, Palabras clave: Infarto cerebral, Ictus isquémico, Trombólisis, Cerebroprotección, Unidades de ictus, Trombosis venosa cerebra

    PRISM (Polarized Radiation Imaging and Spectroscopy Mission): an extended white paper

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    Contains fulltext : 126057.pdf (preprint version ) (Open Access

    Guía para el tratamiento del infarto cerebral agudo

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    Resumen: Introducción: Actualización de la guía para el tratamiento del infarto cerebral agudo de la Sociedad Española de Neurología basada en la revisión y análisis de la bibliografía existente sobre el tema. Se establecen recomendaciones en base al nivel de evidencia que ofrecen los estudios revisados. Desarrollo: Los sistemas de asistencia urgente extrahospitalaria se organizarán para asegurar la atención especializada de los pacientes y el ingreso en unidades de ictus (UI). Deben aplicarse cuidados generales para mantener la homeostasis (tratar la tensión arterial sistólica > 185 mmHg o diastólica > 105 mmHg, evitar hiperglucemia > 155 mg/dl y controlar la temperatura, tratando con antitérmicos cifras > 37,5 °C), y prevenir y tratar las complicaciones. La craniectomía descompresiva debe ser considerada en casos seleccionados de edema cerebral maligno. La trombólisis intravenosa con rtPA se administrará en las primeras 4,5 horas en pacientes sin contraindicación. La trombólisis intraarterial farmacológica puede indicarse en las primeras 6 horas de evolución y la trombectomía mecánica hasta las 8 horas. En el territorio posterior la ventana puede ampliarse hasta 12-24 horas. No hay evidencias para recomendar el uso rutinario de los fármacos denominados neuroprotectores. Se recomienda la anticoagulación en pacientes con trombosis de senos venosos. Se aconseja el inicio precoz de rehabilitación. Conclusiones: El tratamiento del infarto cerebral se basa en la atención especializada en UI, la aplicación urgente de cuidados generales y el tratamiento trombolítico intravenoso en las primeras 4,5 horas. La recanalización intraarterial farmacológica o mecánica pueden ser útiles en casos seleccionados. Terapias de protección y reparación cerebral están en desarrollo. Abstract: Introduction: Update of Acute Ischaemic Stroke Treatment Guidelines of the Spanish Neurological Society based on a critical review of the literature. Recommendations are made based on levels of evidence from published data and studies. Development: Organized systems of care should be implemented to ensure access to the optimal management of all acute stroke patients in stroke units. Standard of care should include treatment of blood pressure (should only be treated if values are over 185/105 mmHg), treatment of hyperglycaemia over 155 mg/dl, and treatment of body temperature with antipyretic drugs if it rises above 37.5 °C. Neurological and systemic complications must be prevented and promptly treated. Decompressive hemicraniectomy should be considered in cases of malignant cerebral oedema. Intravenous thrombolysis with rtPA should be administered within 4.5 hours from symptom onset, except when there are contraindications. Intra-arterial pharmacological thrombolysis can be considered within 6 hours, and mechanical thrombectomy within 8 hours from onset, for anterior circulation strokes, while a wider window of opportunity up to 12-24 hours is feasible for posterior strokes. There is not enough evidence to recommend routine use of the so called neuroprotective drugs. Anticoagulation should be administered to patients with cerebral vein thrombosis. Rehabilitation should be started as early as possible. Conclusion: Treatment of acute ischaemic stroke includes management of patients in stroke units. Systemic thrombolysis should be considered within 4.5 hours from symptom onset. Intra-arterial approaches with a wider window of opportunity can be an option in certain cases. Protective and restorative therapies are being investigated Palabras clave: Infarto cerebral, Ictus isquémico, Trombólisis, Cerebroprotección, Unidades de ictus, Trombosis venosa cerebral, Keywords: Cerebral infarct, Ischaemic stroke, Thrombolysis, Brain protection, Stroke units, Cerebral venous thrombosi

    Planck intermediate results XXV. The Andromeda galaxy as seen by Planck

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    Exploring cosmic origins with CORE: Cluster science

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    Exploring cosmic origins with CORE: Cosmological parameters

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