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  • SAGE Publications  (3)
  • 1
    In: European Stroke Journal, SAGE Publications, Vol. 3, No. 1 ( 2018-03), p. 47-56
    Kurzfassung: In patients with stroke attributable to cervical artery dissection, we compared endovascular therapy to intravenous thrombolysis regarding three-month outcome, recanalisation and complications. Materials and methods In a multicentre intravenous thrombolysis/endovascular therapy-register-based cohort study, all consecutive cervical artery dissection patients with intracranial artery occlusion treated within 6 h were eligible for analysis. Endovascular therapy patients (with or without prior intravenous thrombolysis) were compared to intravenous thrombolysis patients regarding (i) excellent three-month outcome (modified Rankin Scale score 0–1), (ii) symptomatic intracranial haemorrhage, (iii) recanalisation of the occluded intracranial artery and (iv) death. Upon a systematic literature review, we performed a meta-analysis comparing endovascular therapy to intravenous thrombolysis in cervical artery dissection patients regarding three-month outcome using a random-effects Mantel–Haenszel model. Results Among 62 cervical artery dissection patients (median age 48.8 years), 24 received intravenous thrombolysis and 38 received endovascular therapy. Excellent three-month outcome occurred in 23.7% endovascular therapy and 20.8% with intravenous thrombolysis patients. Symptomatic intracranial haemorrhage occurred solely among endovascular therapy patients (5/38 patients, 13.2%) while four (80%) of these patients had bridging therapy; 6/38 endovascular therapy and 0/24 intravenous thrombolysis patients died. Four of these 6 endovascular therapy patients had bridging therapy. Recanalisation was achieved in 84.2% endovascular therapy patients and 66.7% intravenous thrombolysis patients (odds ratio 3.2, 95% confidence interval [0.9–11.38]). Sensitivity analyses in a subgroup treated within 4.5 h revealed a higher recanalisation rate among endovascular therapy patients (odds ratio 3.87, 95% confidence interval [1.00–14.95] ), but no change in the key clinical findings. In a meta-analysis across eight studies (n = 212 patients), cervical artery dissection patients (110 intravenous thrombolysis and 102 endovascular therapy) showed identical odds for favourable outcome (odds ratio 0.97, 95% confidence interval [0.38–2.44]) among endovascular therapy patients and intravenous thrombolysis patients. Discussion and Conclusion In this cohort study, there was no clear signal of superiority of endovascular therapy over intravenous thrombolysis in cervical artery dissection patients, which – given the limitation of our sample size – does not prove that endovascular therapy in these patients cannot be superior in future studies. The observation that symptomatic intracranial haemorrhage and deaths in the endovascular therapy group occurred predominantly in bridging patients requires further investigation.
    Materialart: Online-Ressource
    ISSN: 2396-9873 , 2396-9881
    Sprache: Englisch
    Verlag: SAGE Publications
    Publikationsdatum: 2018
    ZDB Id: 2851287-X
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 2
    In: The Holocene, SAGE Publications, Vol. 29, No. 7 ( 2019-07), p. 1189-1197
    Kurzfassung: Arctic environments may respond very sensitively to ongoing global change, as observed during the past decades for Arctic vegetation. Only little is known about the broad-scale impacts of early and mid 20th-century industrialization and climate change on remote Arctic environments. Palynological analyses of Greenland ice cores may provide invaluable insights into the long-term vegetation, fire, and pollution dynamics in the Arctic region. We present the first palynological record from a Central Greenland ice core (Summit Eurocore ’89, 72°35’N, 37°38’W; the location of Greenland Ice Core Project GRIP) that provides novel high-resolution microfossil data on Arctic environments spanning AD 1730–1989. Our data suggest an expansion of birch woodlands after AD 1850 that was abruptly interrupted at the onset of the 20th century despite favorable climatic conditions. We therefore attribute this Betula woodland decline during the 20th century to anthropogenic activities such as sheep herding and wood collection in the sub-Arctic. First signs of coal burning activities around AD 1900 coincide with the onset of Arctic coal mining. The use of coal and fire activity increased steadily until AD 1989 resulting in microscopic-size pollution of the ice sheet. We conclude that human impact during the 20th century strongly affected (sub)-Arctic environments. Moreover, ecosystems have changed through the spread of adventive plant species (e.g. Ranunculus acris, Rumex) and the destruction of sparse native woodlands. We show for the first time that optical palynology allows paleoecological reconstructions in extremely remote sites 〉 500 km from potential sources, if adequate methods are used.
    Materialart: Online-Ressource
    ISSN: 0959-6836 , 1477-0911
    RVK:
    Sprache: Englisch
    Verlag: SAGE Publications
    Publikationsdatum: 2019
    ZDB Id: 2027956-5
    SSG: 14
    SSG: 3,4
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 3
    Online-Ressource
    Online-Ressource
    SAGE Publications ; 1999
    In:  The Neuroscientist Vol. 5, No. 3 ( 1999-05), p. 142-146
    In: The Neuroscientist, SAGE Publications, Vol. 5, No. 3 ( 1999-05), p. 142-146
    Kurzfassung: Cytokines are released during acute and chronic inflammatory diseases of the CNS and activate receptors on glial cells, thereby inducing various effects such as proliferation, expression of major histocompatibility complex genes or secretion of growth factors. Here, we summarize current evidence indicating that K+ currents, Ca 2+ currents, and the activity of ion transporters on astrocytes, microglial cells, and oligodendrocytes are also affected by cytokines. In disease states with associated elevated cytokine titers, such alterations in electrophysiological properties of glial cells might contribute to the patho genesis of neurological symptoms. NEUROSCIENTIST 5:142-146, 1999
    Materialart: Online-Ressource
    ISSN: 1073-8584 , 1089-4098
    Sprache: Englisch
    Verlag: SAGE Publications
    Publikationsdatum: 1999
    ZDB Id: 2029471-2
    Standort Signatur Einschränkungen Verfügbarkeit
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