Linked Life Data

3875326

Source:http://linkedlifedata.com/resource/pubmed/id/3875326

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1985-9-19
pubmed:abstractText
A model of arrhythmias based on the application of sinusoidal alternating current (ac) to isolated heart preparations has been employed to determine the effects of hypoxia (30 vol % O2 in the perfusion medium) on the threshold of arrhythmia and asystole. With this method three representatives of different classes of antiarrhythmic drugs, flecainide, bepridil and amiodarone, have been investigated in isolated papillary muscles and left atria from guinea-pigs. Hypoxia reduces both the threshold for ac-arrhythmia and the threshold for ac-asystole. Flecainide (3 and 10 mumol/l) elevates both thresholds under normoxia and has a protective effect against the hypoxia-induced reduction of threshold. Bepridil (10 mumol/l) is without effect on the threshold of ac-arrhythmia in papillary muscle, prevents the hypoxia-induced decline of the threshold of ac-arrhythmia in left atria and depresses the threshold of ac-asystole both in normoxia and hypoxia. amiodarone (10 mumol/l) elevates the threshold of ac-arrhythmia both during normoxia and hypoxia in papillary muscle but only during the second hour of hypoxia in left atria. The results may be interpreted with respect to the inhibitory action on Na+-channels (flecainide), Ca2+-channels (bepridil) or protective effects against hypoxia-induced changes in action potential duration (amiodarone, but also flecainide and bepridil) as shown by additional electrophysiological experiments.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
0301-4533
pubmed:author
pubmed:issnType
Print
pubmed:volume
274
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
267-82
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1985
pubmed:articleTitle
Antiarrhythmic and electrophysiological actions of flecainide, bepridil and amiodarone on isolated heart preparations during controlled hypoxia.
pubmed:publicationType
Journal Article, In Vitro, Research Support, Non-U.S. Gov't