Linked Life Data

3756974

Source:http://linkedlifedata.com/resource/pubmed/id/3756974

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
1986-10-30
pubmed:abstractText
Equal reductions in heart rate (44 beats X min-1) were obtained in cats by treatment with either the beta blocking agent timolol or alinidine, an agent claimed to cause bradycardia without interfering with beta adrenoceptor function. Infarct size was measured by staining with triphenyltetrazolium-chloride after 5 h of coronary occlusion and related to the area of hypoperfused myocardium as measured by autoradiography. Regional myocardial blood flow was measured by 15 micron radiolabelled microspheres. Compared with the control cats, in whom 87.4 (SEM 2.2)% of hypoperfused myocardium developed into necrosis, timolol reduced infarct size to 65.8 (SEM 2.6)% (p less than 0.001) and alinidine to 76.2 (SEM 3.1)% (p less than 0.01) of the hypoperfused area. Timolol reduced infarct size more than did alinidine (p less than 0.01). Necrosis was more extensive in the endocardium than in the epicardium in all groups. In the subendocardium timolol and alinidine reduced infarct size to the same extent, whereas timolol reduced infarct size more than alinidine in the subepicardium. Although heart rate proved to be the dominant haemodynamic predictor of infarct size, this study indicates that mechanisms other than reduced oxygen demand associated with bradycardia and cardiodepression are operating in the ischaemic myocardium during beta adrenergic blockade.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0008-6363
pubmed:author
pubmed:issnType
Print
pubmed:volume
20
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
322-30
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1986
pubmed:articleTitle
Is reduced cardiac performance the only mechanism for myocardial infarct size reduction during beta adrenergic blockade?
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't