Linked Life Data

2797212

Source:http://linkedlifedata.com/resource/pubmed/id/2797212

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1989-11-8
pubmed:abstractText
The cardioprotective effects of nifedipine, verapamil, diltiazem, bepridil, CERM 11956, lidoflazine, mioflazine and the coronary vasodilator dipyridamole were evaluated in the guinea-pig working heart with respect to cardiac function and high energy phosphate content after 45 min of global ischaemia and 25 min of reperfusion. All drugs, with the exception of dipyridamole, induced a negative inotropic effect, which resulted in a decrease of the aortic pressure (AoP), of its first derivative dAoP/dt and the cardiac output. To compare the anti-ischaemic effect of the calcium antagonists, concentrations were selected that reduced the dAoP/dt by 10% (EC10) and 30% (EC30), respectively. With the exception of nifedipine at the EC10 and bepridil and CERM 11956 at the EC30, perfusion with the calcium antagonists and dipyridamole (3 mumol/l) improved the recovery of contractile function after global ischaemia and reperfusion to a value between 60 and 80% of the controls in normoxic hearts. Pretreatment with nifedipine, verapamil, diltiazem, lidoflazine and mioflazine, but not with bepridil, CERM 11956 and dipyridamole led to slightly increased ATP levels in ischaemic hearts as compared to the control value in ischaemic hearts. After subsequent reperfusion for 25 min, for all drugs, ATP levels were further enhanced to 50% of the level in normoxic hearts; phosphocreatine levels reached normoxic values. In particular at the EC30, the effects of calcium antagonists on cardiac function varied in accordance with their known pharmacological and physiological profile. However, there appeared to exist no direct relationship between their beneficial effects on contractile activity and those on the levels of high energy phosphates after ischaemia and reperfusion.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
0028-1298
pubmed:author
pubmed:issnType
Print
pubmed:volume
340
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
126-34
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1989
pubmed:articleTitle
A comparison of the cardioprotective effects of calcium antagonists from different classes upon ischaemic damage in the guinea-pig working heart.
pubmed:affiliation
Department of Pharmacotherapy/Pharmacology, Faculty of Medicine, Academie Medical Center, University of Amsterdam, The Netherlands.
pubmed:publicationType
Journal Article, Comparative Study, In Vitro