Linked Life Data

3662080

Source:http://linkedlifedata.com/resource/pubmed/id/3662080

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
1987-11-10
pubmed:abstractText
The authors sought to determine if isoflurane would attenuate effects of three different types of vasoconstrictors on isolated segments of canine epicardial coronary arteries removed from healthy dogs. As the endothelium has a major role in regulating epicardial coronary artery tone, and as it modulates the effect of many vasoactive substances, experiments were conducted both on normal rings and on rings whose endothelium had been mechanically removed. In addition, the endothelium is thought to be damaged in human atherosclerosis. Rings were suspected in organ chambers filled with modified Krebs-Ringer bicarbonate solution, aerated with 95% oxygen and 5% carbon dioxide, and connected to strain gauges for the measurement of isometric tension. Isoflurane 2.3% (1.5 MAC in the dog) was added to the aerating gas mixture in half the preparations, while the other rings served as control. The vasoconstrictors serotonin, phenylephrine, or prostaglandin F2 alpha were added in increasing concentrations to the bath solution. In the presence of endothelium, vasoconstrictor evoked contractions were attenuated by isoflurane. Maximal tension generated by prostaglandin F2 alpha in untreated rings was 114 +/- 18% (mean +/- SEM) of a reference contraction, while, following isoflurane, it was 46 +/- 8% (P less than 0.005). In the absence of endothelium, isoflurane attenuated neither prostaglandin F2 alpha nor serotonin evoked contraction, and had decreased effectiveness against phenylephrine mediated contraction (P less than 0.001). It is concluded that isoflurane attenuates vasoconstrictor-evoked contraction of isolated canine epicardial coronary arteries, and that this effect is mediated by the endothelium.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
AIM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0003-3022
pubmed:author
pubmed:issnType
Print
pubmed:volume
67
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
513-7
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1987
pubmed:articleTitle
Isoflurane causes endothelium-dependent inhibition of contractile responses of canine coronary arteries.
pubmed:affiliation
Department of Anesthesiology, Mayo Clinic, Rochester, Minnesota.
pubmed:publicationType
Journal Article, In Vitro, Research Support, Non-U.S. Gov't