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Effects of triglycyl-lysine-vasopressin on cardiovascular responses to orthostatic stress.
Karolinska Institutet.
1987 (English)In: Clinical Physiology, ISSN 0144-5979, Vol. 7, no 4, 329-35 p.Article in journal (Refereed) Published
Abstract [en]

The influence of triglycyl-lysine-vasopressin (TGLVP) on cardiovascular responses to orthostatic stress was studied. Arterial pressures, heart rate (HR) and stroke volume (SV) were measured in eight healthy males subjected to 20 min 70 degrees head-up tilt. On different days they received either 0.01 mg/kg b.w. of TGLVP or a corresponding volume of 0.9% saline i.v. after 15 min supine rest. After the drug injection, in supine subjects, HR had decreased from 58 to 50 beats min-1, total peripheral resistance (TPR) was elevated by 29%, systolic (SAP) and diastolic pressure (DAP) had increased by 7 and 8 mmHg, respectively. During tilt, values for HR and SAP were similar with and without TGLVP whereas DAP and MAP were elevated 8 and 7 mmHg, respectively, by the drug. 4-8 min into the tilt, TGLVP caused an 8% sustained curtailment of SV. Both with and without the drug TPR increased by about 30% in response to head-up tilt. Thus, the marked peripheral arteriolar constriction after vasopressin in the supine position was not affected by head-up tilt. Tilting also abolished the drug-induced elevation in SAP, most likely explained by the reduction in SV. Although TPR was markedly increased by TGLVP during head-up tilt, reflected in the behaviour of DAP, the response of SV speaks against any beneficial effect of this drug on orthostatic tolerance in healthy subjects.

Place, publisher, year, edition, pages
1987. Vol. 7, no 4, 329-35 p.
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URN: urn:nbn:se:kth:diva-44634DOI: 10.1111/j.1475-097X.1987.tb00176.xPubMedID: 3621870OAI: diva2:452174
QC 20111109Available from: 2011-10-28 Created: 2011-10-25 Last updated: 2011-11-09Bibliographically approved

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Eiken, Ola
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