Linked Life Data

2688362

Source:http://linkedlifedata.com/resource/pubmed/id/2688362

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1990-1-12
pubmed:abstractText
The arginine vasopressin (AVP) release in response to repeated hypotension caused by intravenous (i.v.) infusion of sodium nitroprusside (SNP) or haemorrhage was studied in conscious euhydrated sheep. Parallel determinations of renal excretion and plasma concentration of AVP were made in experiments involving two consecutive 10-min i.v. infusions of SNP (about 35 micrograms kg-1 min-1) with a 3-h interval between and repeated the next day. The AVP response to the second SNP administration was significantly reduced, but partial recovery was observed in response to the initial infusion the next day. Maximal fall in mean arterial blood pressure (MABP) and its recovery pattern did not differ in response to any of the four SNP infusions. In contrast, impaired recovery of the MABP together with markedly reduced AVP response was seen as a consequence of a hypotensive haemorrhage repeated after 3 h, but not when the interval between haemorrhages was extended to 24 h. The haemorrhage-induced increase in plasma renin activity was not affected by variations in the interval between experiments. It is concluded that the massive AVP liberation normally seen as an effect of acute isovolaemic hypotension becomes markedly reduced upon a renewed fall in the MABP occurring within 3 h. An iteration of hypotensive haemorrhage accentuates this fatigue of the hormonal response, which may contribute to the impaired recovery of the MABP.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
0001-6772
pubmed:author
pubmed:issnType
Print
pubmed:volume
137
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
427-36
pubmed:dateRevised
2007-11-15
pubmed:meshHeading
pubmed:year
1989
pubmed:articleTitle
Repeated hypotension induced by nitroprusside and haemorrhage in sheep: effects on vasopressin release and recovery of arterial blood pressure.
pubmed:affiliation
Department of Physiology, Karolinska Institute, Stockholm, Sweden.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't