GLORIA

GEOMAR Library Ocean Research Information Access

feed icon rss

Your email was sent successfully. Check your inbox.

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

Proceed reservation?

Export
Filter
  • Hypertension  (2)
  • Mittlerer arterieller Blutdruck  (2)
  • Angioendothelioma  (1)
  • 1990-1994
  • 1985-1989  (3)
  • 1970-1974  (2)
  • 1987  (1)
  • 1986  (2)
  • 1971  (2)
Document type
Publisher
Years
  • 1990-1994
  • 1985-1989  (3)
  • 1970-1974  (2)
Year
  • 1
    ISSN: 1591-9528
    Keywords: Mean arterial blood pressure ; Heart rate ; Renal transport system ; Mittlerer arterieller Blutdruck ; Herzfrequenz ; Renales Transportsystem
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei der narkotisierten vagotomierten Ratte wurde über 2 Std die Wirkung von intraperitoneal injiziertem Guancydin auf den mittleren arteriellen Blutdruck und die Herzfrequenz beobachtet. Hier konnte ein dosisabhängiger blutdruck- und frequenzsenkender Effekt nachgewiesen werden. Nephrektomierte Tiere oder Tiere mit doppelseitiger Ureterligatur und ureteroabdomineller Fistel sowie Tiere, die mit Probenecid vorbehandelt waren, zeigten im Vergleich zu den Normaltieren eine deutlich stärkere Ansprechbarkeit auf die gleiche Guancydindosis. 2 Std nach der Guancydingabe konnte zwischen den Blutdruckwerten der vorbehandelten Kollektive und dem mittleren Druckwert des Normalkollektivs eine hochsignifikante Differenz ermittelt werden (p〈0,001). Aus diesen Befunden wird gefolgert, daß Guancydin rasch durch die Nieren ausgeschieden wird und daß auf Grund der deutlichen Potenzierung der Guancydinwirkung durch Probenecid eine aktive Ausscheidung des Antihypertensivums in der Niere wahrscheinlich ist.
    Notes: Summary In anesthetized and vagotomized rats the effect of intraperitoneally injected guancydine on the mean arterial blood pressure and heart rate was observed over a time of 2 hrs. A dose-dependent hypotensive and heart rate lowering effect could be recorded. Nephrectomized animals or animals with bilateral ureteral ligature and ureteroabdominal fistula and animals, which were pretreated with probenecid, showed a significantly increased sensitivity to guancydine compared to the normal rats. 2 hrs after application of guancydine a highly significant difference could be observed between the mean blood pressure of the pretreated and the normal animals (p〈0.001). These results suggest, that guancydine is rapidly excreted through the kidneys, and that the secretion of this antihypertensive agent is an active process.
    Type of Medium: Electronic Resource
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 2
    ISSN: 1591-9528
    Keywords: Mean arterial blood pressure ; Heart rate ; Renal transport system ; Mittlerer arterieller Blutdruck ; Herzfrequenz ; Renales ; Transportsystem
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei Ratten, die mit Furosemid oder Mefrusid vorbehandelt worden waren, wurde über einen Zeitraum von 2 Std die Wirkung von intraperitoneal injiziertem Guancydin (25 mg/kg) auf den mittleren arteriellen Blutdruck und die Herzfrequenz beobachtet. Im Vergleich zu nichtvorbehandelten Tieren konnte eine deutliche Potenzierung der blutdruck- und herzfrequenzreduzierenden Guancydinwirkung nachgewiesen werden. Der Effekt war dosisabhängig, da 2 Std nach der Guancydingabe die mit 25 mg/kg Furosemid oder 50 mg/kg Mefrusid vorbehandelten Tiere einen signifikant niedrigeren Blutdruck aufwiesen als diejenigen, die vorher 12,5 mg/kg Furosemid oder 25 mg/kg Mefrusid erhalten hatten (p〈0,01). Es konnte wahrscheinlich gemacht werden, daß die Ursache für diesen Effekt weniger in einer diuretikumbedingten Veränderung des Wasser- und Elektrolythaushalts als darin liegt, daß Furosemid, Mefrusid und Guancydin über dasselbe renale Transportsystem ausgeschieden werden. Als Ausdruck einer Konkurrenz der Substanzen um dieses Transportsystem kam es möglicherweise zu einer Verzögerung der Guancydinausscheidung und somit zu einer verstärkten Wirkung des Antihypertensivums auf den Blutdruck und die Herzfrequenz. Diese Auslegung der Ergebnisse wird außerdem dadurch bestätigt, daß in weiteren Versuchen der diuretische und natriuretische Furosemideffekt durch Vorbehandlung mit Guancydin signifikant herabgesetzt werden konnte (p〈0,01). Dieser Effekt war gleichfalls dosisabhängig.
    Notes: Summary In rats, which were treated, with furosemide and mefruside, the effect of intraperitoneally injected guancydine (25 mg/kg) on the mean arterial blood pressure and the heart rate was studied over a period of 2 hrs. In comparison with, normal animals, a significant potentiation of the depressant effect of guancydine on heart rate and blood pressure was observed. This effect was dose dependent, since the animals, which were pretreated with 25 mg/kg furosemide or 50 mg/kg mefruside, showed a significantly lower blood pressure than rats, which received 12,5 mg/kg furosemide or 25 mg/kg mefruside (p〈0.01). It is suggested, that the causes of these effects were not the saluretic-induced alterations of the water and electrolyte balance but the fact, that furosemide, mefruside and guancydine are excreted by the same renal transport system. These findings were strongly supported by the fact, that in other experiments pretreatment with guancydine significantly lowered the diuretic and natriuretic action of furosemide (p〈0.01). This effect was also dose dependent.
    Type of Medium: Electronic Resource
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 64 (1986), S. 1134-1138 
    ISSN: 1432-1440
    Keywords: Hemangiosarcoma ; Angiosarcoma ; Angioendothelioma ; Heart tumor ; Echocardiography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The clinical appearance, typical localization, diagnostic procedure and the treatment of hemangiosarcoma — the most frequent malignant tumor of the heart are reported by the case of a 27 years old woman. The patient suffered from dyspnea, congestion of the superior caval vein and paroxysmal tachycardia. X-ray showed cardiac enlargement due to pericardial effusion. Echocardiography revealed a large tumor in the right atrium. Computertomography and angiocardiography showed tumor masses at the orifice of the superior caval vein and a bypass of the blood flow via the azygos vein. Thoracotomy yielded an inoperable hemangiosarcoma. By the combined treatment of irradiation and chemotherapy the cardiac tumor completely disappeared, the patient was temporary symptomless. Later metastases occured and the patient died 13 months after diagnosis.
    Type of Medium: Electronic Resource
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 64 (1986), S. 1183-1185 
    ISSN: 1432-1440
    Keywords: Salt restriction ; Weight reduction ; Hypertension ; Intracellular electrolytes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In 16 essential hypertensives on a program of energy restriction (800 kcal/day) with and without simultaneous salt restriction, the effects on blood pressure and intracellular Na+ and Ca2+ in red blood cells were studied. A decrease in blood pressure and intracellular free Na+ and Ca2+ was only observed in the cases of simultaneous energy and salt restriction. The beneficial effect of weight reduction in hypertension thus depends on a diminished salt intake and is probably mediated by changes in intracellular free Ca2+.
    Type of Medium: Electronic Resource
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 65 (1987), S. 155-160 
    ISSN: 1432-1440
    Keywords: Hypertension ; Ca2+
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Several disturbances of cellular Ca2+ metabolism have been described in essential hypertension and in the spontaneously hypertensive rat. Possibly the elevation of intracellular free Ca2+ concentration in arterial smooth muscle cells is one important step in the pathogenesis of primary hypertension. In most studies a decreased energy-dependent Ca2+ transport has been proposed as a mechanism. However, disturbances in cellular Ca2+ metabolism, which can be exclusively ascribed to essential hypertension, have not yet been found. The cause of altered cellular Ca2+ transport in primary hypertension may either be a genetically determined defect of membrane transport or a still-unidentified humoral factor.
    Type of Medium: Electronic Resource
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...