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  • 1980-1984  (2)
  • 1925-1929
  • 1982  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 23 (1982), S. 475-477 
    ISSN: 1432-1041
    Keywords: stroke volume measurement ; impedance cardiography ; amezinium ; echocardiography ; comparative measurement ; tilting
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The relationship between stroke volume (SV) measured simultaneously by impedance cardiography (SV1) and echocardiography (SVE) has been analyzed. Change in stroke volume in 6 healthy volunteers was induced by passive head-up tilting (80°) and by oral administration of the sympathomimetic drug amezinium. A correlation ofr=0.83 (p j 0.01) was found between SVI and SVE calculated by the equation: SVE=16.0+(0.528×SVI). Though stroke volume is overestimated by impedance cardiography, the method may be useful for the clinical pharmacologist interested in a simple non-invasive tool to estimate stroke volume and change in it.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    European archives of psychiatry and clinical neuroscience 231 (1982), S. 149-154 
    ISSN: 1433-8491
    Keywords: Visual evoked potentials ; Stimulus luminance ; Multiple sclerosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Nachdem psychophysische Experimente nahelegen, daß schon nach geringen Leuchtdichteänderungen die interokulären Latenzdifferenzen bei MS-Patienten beträchtlich zunehmen, untersuchten wir den Einfluß von Leuchtdichteänderungen auf die diagnostische Trefferrate der VEP bei der Multiplen Sklerose. Über einen Bereich von drei logarithmischen Einheiten brachten Leuchtdichteänderungen keine Zunahme der diagnostischen Ausbeute. Auch die Regressionskoeffizienten der Funktion VEP-Latenz gegen Leuchtdichte unterschieden sich bei MS-Kranken nicht von denen bei Gesunden. Da bei abnehmender Leuchtdichte die Trefferquote der VEP sogar deutlich abnimmt, muß diese Variable in der Klinik beachtet werden.
    Notes: Summary In view of the fact that with psychophysical methods monocular luminance changes may increase the detection rate of pathological interocularlatency differences in MS patients, we studied the influence of stimulus luminance on the detection rate of MS using checkerboard visual evoked potentials. Decrements of stimulus luminance covering a range of three log units were unable to increase the detection rate of VEP. Regression coefficients of the luminance-latency functions did not differ in MS patients and normals. Contrary to the hypothesis tested, the diagnostic significance of VEP decreases with decreasing stimulus intensity.
    Type of Medium: Electronic Resource
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