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  • 4-aminopyridine  (1)
  • Calcium-dependent potassium conductance  (1)
  • Cerebral vasospasm  (1)
Materialart
Erscheinungszeitraum
Schlagwörter
  • 1
    Digitale Medien
    Digitale Medien
    Amsterdam : Elsevier
    Regulatory Peptides 46 (1993), S. 367-369 
    ISSN: 0167-0115
    Schlagwort(e): Afterhyperpolarization ; Calcium-dependent potassium conductance ; Neurokinin A ; Substance P ; Sympathetic preganglionic neuron
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Medizin
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Springer
    Pflügers Archiv 408 (1987), S. 207-208 
    ISSN: 1432-2013
    Schlagwort(e): Transient outward current ; Potassium current ; 4-aminopyridine ; Post-spike hyperpolarization ; Spinal cord
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Intracellular recordings were made from sympathetic pregangionic neurons of the intermediolateral nucleus, in the slice of the T3 segment of the cat spinal cord. Depolarization to −60 mV from membrane potentials more negative than −75 to −80 mV caused a transient outward rectification which decayed in 0.5–2.0s. The rectification was sensitive to changes in K concentation, was abolished by 4AP (2 mM), and was unaffected by low Ca (0.25 mM), Co (2 mM), Ba (1 mM), TEA (20 mM) or intracellular Cs. These properties suggest that the rectification is due to a transient K-current similar to the A-current described in other neurons.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    ISSN: 0942-0940
    Schlagwort(e): Cerebral vasospasm ; concentration ; papaverine ; subarachnoid haemorrhage
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary We evaluated the effect of intra-arterially infused papaverine solutions of various concentrations on cerebral vasospasm following subarachnoid haemorrhage. A total of 90 vascular territories in 46 patients with symptomatic cerebral vasospasm after subarachnoid haemorrhage were treated with intra-arterial infusions of papaverine. In all patients, papaverine was infused at the top of the internal carotid artery (ICA). Of the 90 vascular territories, 30 vascular territories in 14 patients were treated with an infusion of 0.1–0.2% (weight/volume) papaverine (Group 1), 30 vascular territories in 16 patients were treated with a 0.4% (w/v) papaverine infusion (Group 2), and 30 vascular territories in 16 patients were treated with an infusion of 0.8–2.0% (w/v) papaverine (Group 3). Among the three groups, we compared the vasodilatory effects of papaverine by assessing the angiographical and clinical improvements following the treatment. When 0.4% (w/v) papaverine was infused, 24 vascular territories (80%) were successfully dilated and 7 patients (44%) showed a marked reversal of neurological deficits due to vasospasm. Therefore, 80 mg/20 ml (0.4% (w/v)) papaverine infused over a 10-minute period proved to be a beneficial concentration. Transient focal neurological deficits due to the infusion of papaverine occurred in 1 Group 1 patient (7%), 1 Group 2 patient (6%), and 7 Group 3 patients (44%). Highly concentrated papaverine had a higher risk of temporary deterioration. In conclusion, the papaverine concentration of 0.4% (w/v) infused at the top of the ICA was a safe and adequate concentration for treating cerebral vasospasm.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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