Linked Life Data

9020

Source:http://linkedlifedata.com/resource/pubmed/id/9020

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1976-11-1
pubmed:abstractText
The cardiovascular effects of halothane-nitrous oxide anesthesia, and beta-receptor blockade with either propranolol or practolol, were studied in 15 dogs in which severe myocardial infarction had been induced ten days earlier. The hemodynamic responses to blood loss amounting to 25 per cent of estimated blood volume, and its subsequent replacement, were studied before and after induction of beta-receptor blockade. In terms of cardiac output and aortic blood flow acceleration, cardiac performance in the absence of beta-blockade was markedly impaired during steady-state anesthesia, compared with corresponding values in normal dogs. Practolol (2.0 mg/kg) administered during anesthesia induced no significant circulatory change other than a 14 per cent decrease in heart rate and a 25 per cent increase in strode volum. Propranolol (0.3 mg/kg) caused a comparable reduction of heart rate, but significantly reduced cardiac output (-27 per cent), aortic blood flow acceleration (-26 per cent), and peak LV power (-19 per cent), and increased systemic vascular resistance (+49 per cent). The two drugs caused comparable shifts of the isoproterenol dose-response curve during anesthesia. Graduated blood loss during anesthesia, to a total of 25 per cent of blood volume, caused consistent circulatory changes (decreased mean arterial pressure cardiac output, peak LV power, LV minute work) that were essentially similar before and after beta-receptor blockade with either propranolol or practolol. The positive inotropic effect of calcium gluconate during halothane anesthesia was significantly reduced following either propranolol or practolol, but the hemodynamic responses to changes of systemic vascular resistance induced with acetylcholine or phenylephrine were not modified by beta-receptor blockade.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
AIM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0003-3022
pubmed:author
pubmed:issnType
Print
pubmed:volume
45
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
326-9
pubmed:dateRevised
2007-11-15
pubmed:meshHeading
pubmed:year
1976
pubmed:articleTitle
Interaction of anesthesia, beta-receptor blockade, and blood loss in dogs with induced myocardial infarction.
pubmed:publicationType
Journal Article