Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 32 (1976), S. 195-196 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary There was no reduction in the pulmonary pressor response to hypoxia following inhibition of prostaglandin synthesis in rats exposed to chronic hypoxia. A fall in left ventricular weight suggested that systemic pressure may have been reduced after inhibition of prostaglandin synthesis in normoxic rats.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 33 (1977), S. 1192-1194 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary In calves with hypoxic pulmonary hypertension, resistance was reduced by 40±3% with normoxia, 19±4% with verapamil, and 60±1% with hexoprenaline. It is possible that the increased resistance during normoxia is due partly to vasoconstriction rather than solely to vascular thickening, and that the vasoconstriction is due to an abnormality in calcium metabolism by the hypertensive vasculature.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 31 (1975), S. 1303-1304 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Cooling the skin of cattle at an ambient temperature of 25°C decreased cardiac output and increased systemic and pulmonary vascular resistances. Minute ventilation was reduced by about 50%. There was no change in alveolar ventilation as measured by arterial blood gases. These results indicate that thermoregulatory ventilation has significant cardiopulmonary effects in cattle at normal laboratory temperatures.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    ISSN: 1439-6327
    Keywords: Key words Erythropoietin ; Red cell volume ; Blood volume ; Propranolol ; Hypoxia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract When humans ascend to high altitude (ALT) their plasma volume (PV) and total blood volume (BV) decrease during the first few days. With continued residence over several weeks, the hypoxia-induced stimulation of erythropoietin increases red cell production which tends to restore BV. Because hypoxia also activates the β-adrenergic system, which stimulates red blood cell production, we investigated the effect of adrenergic β-receptor inhibition with propranolol on fluid volumes and the polycythemic response in 11 healthy unacclimatized men (21–33 years old exposed to an ALT of 4300 m (barometric pressure 460 Torr) for 3 weeks on Pikes Peak, Colorado. PV was determined by the Evans blue dye method (PVEB), BV by the carbon monoxide method (BVCO), red cell volume (RCV) was calculated from hematocrit (Hct) and BVCO, and serum erythropoietin concentration ([EPO]) and reticulocyte count, were also determined. All determinations were made at sea level and after 9–11 (ALT-10) and 19–20 (ALT-20) days at ALT. At sea level and ALT, six men received propranolol (pro, 240 mg · day−1), and five received a placebo (pla). Effective β-blockade did not modify the mean (SE) maximal values of [EPO] [pla: 24.9 (3.5) vs pro: 24.5 (1.5) mU · ml−1] or reticulocyte count [pla: 2.7 (0.7) vs pro: 2.2 (0.5)%]; nor changes in PVEB [pla: −15.8 (3.8) vs pro: −19.9 (2.8)%], RCVCO [pla: +7.0 (6.7) vs pro: +10.1 (6.1)%], or BVCO [pla: −7.3 (2.3) vs pro: −7.1 (3.9)%]. In the absence of weight loss, a redistribution of body water with no net loss is implied. Hence, activation of the β-adrenergic system did not appear to affect the hypovolemic or polycythemic responses that occurred during 3 weeks at 4300 m ALT in these subjects.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    ISSN: 1435-1803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die Auswirkungen chronischer oraler Gabe von Fenfluramin allein und in Kombination mit Aminorex auf den System- und Lungenkreislauf wurden bei jungen Schweinen, denen eine Pulmonalarterie ligiert worden war, untersucht. Die Reaktivität der Lungengefäße wurde durch alveoläre Hypoxie, alveoläre Hyperoxie und Infusion von Prostaglandin F2α bei den verschiedenen Gruppen geprüft. Nach 3monatiger oraler Verabreichung fand sich keine Erhöhung des Pulmonalarteriendruckes und die Effekte der gefäßverengenden Stimuli, Hypoxie und Prostaglandin F2α, bzw. des gefäßerweiternden Stimulus, Hyperoxie, waren in allen Gruppen gleich. Fenfluramin oder Aminorex zeigen daher im Langzeitversuch keine pulmonale Drucksteigerung bzw. keine Veräderung der Reaktivität des Lungefäßbettes beim Schwein, während durch Fenfuramin eine Erhöhung des arteriellen Blutdruckes beobachtet wurde.
    Notes: Summary We have investigated the effects of chronic oral administration of two anorectic substances, fenfluramine and aminorex, especially on the pulmonary circulation in young pigs with one ligated pulmonary artery. The pulmonary vascular reactivity was tested by alveolar hypoxia, alveolar hyperoxia and infusion of prostaglandin F2α No elevation of pulmonary arterial pressures or resistance were found due to the intake of fenfluramine or aminorex over a three month period. The responses to the vasoconstrictor stimuli, hypoxia and prostaglandin F2α, and to the vasodilator stimulus, hyperoxia, were equal and not augmented in the drug groups. Fenfluramine or aminorex could therefore not be shown to have an adverse effect on the pulmonary circulation or on the reactivity of the pulmonary vascular bed in the pig, but fenfluramine elevated systemic arterial pressure.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...