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- Publisher Website: 10.1093/cvr/24.8.669
- Scopus: eid_2-s2.0-85047678844
- PMID: 2224935
- WOS: WOS:A1990DU07200011
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Article: Effects of the free radical generating system FeCl 3/ADP on reperfusion arrhythmias of rat hearts and electrical activity of canine Purkinje fibres
Title | Effects of the free radical generating system FeCl 3/ADP on reperfusion arrhythmias of rat hearts and electrical activity of canine Purkinje fibres |
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Authors | |
Keywords | Free radical Infarction Purkinje fibres Reperfusion arrhythmias |
Issue Date | 1990 |
Publisher | Oxford University Press. The Journal's web site is located at http://cardiovascres.oxfordjournals.org |
Citation | Cardiovascular Research, 1990, v. 24 n. 8, p. 669-675 How to Cite? |
Abstract | The aim was to evaluate the arrhythmogenic effect of a free radical generating system, FeCl 3/ADP, using two different approaches. Ventricular arrhythmias were studied in isolated rat hearts subjected to regional ischaemia and reperfusion without or with simultaneous treatment with nicergoline (0.4 mg·litre -1). In the second part of this study the electrophysiological effects of FeCl 3/ADP (0.1/1.0 μM) were investigated in normal Purkinje fibres and in Purkinje fibres from dog surviving infarction, by using conventional micro-electrode method. Hearts were obtained from male Sprague-Dawley rats, weight 250-300 g. Purkinje fibres were dissected from hearts of mongrel dogs of either sex (10-15 kg) with or without prior myocardial infarction. FeCl 3/ADP (0.1/1.0 μM and 1.0/1.0 μ M respectively) weakly changed the incidence of reperfusion induced arrhythmias. In nicergoline pretreated hearts, in which the incidence of reperfusion arrhythmias was reduced, FeCl 3/ADP (0.1/1.0 μM) did not change the incidence and the duration of reperfusion arrhythmias. In normal Purkinje fibres, FeCl 3/ADP(0.1/1.0μM) induced a decrease in action potential duration without any pronounced effect on V(max), diastolic potential, and activation potential. In Purkinje fibres from post infarct myocardium, FeCl 3/ADP decreased action potential duration, diastolic potential, and activation potential. Free radical generation did not antagonise the antiarrhythmic activity of α adrenergic blockade. Free radical generation induced slow and minor changes in electrophysiological activity of Purkinje fibres both from normal and ischaemic hearts. Our data suggest that free radical generation may not be the only mechanism involved in the genesis of reperfusion arrhythmias. |
Persistent Identifier | http://hdl.handle.net/10722/170966 |
ISSN | 2021 Impact Factor: 13.081 2020 SCImago Journal Rankings: 2.774 |
ISI Accession Number ID |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Bril, A | en_US |
dc.contributor.author | Rochette, L | en_US |
dc.contributor.author | Verry, A | en_US |
dc.contributor.author | Maupoil, V | en_US |
dc.contributor.author | Man, RYK | en_US |
dc.contributor.author | Opie, LH | en_US |
dc.date.accessioned | 2012-10-30T06:11:38Z | - |
dc.date.available | 2012-10-30T06:11:38Z | - |
dc.date.issued | 1990 | en_US |
dc.identifier.citation | Cardiovascular Research, 1990, v. 24 n. 8, p. 669-675 | en_US |
dc.identifier.issn | 0008-6363 | en_US |
dc.identifier.uri | http://hdl.handle.net/10722/170966 | - |
dc.description.abstract | The aim was to evaluate the arrhythmogenic effect of a free radical generating system, FeCl 3/ADP, using two different approaches. Ventricular arrhythmias were studied in isolated rat hearts subjected to regional ischaemia and reperfusion without or with simultaneous treatment with nicergoline (0.4 mg·litre -1). In the second part of this study the electrophysiological effects of FeCl 3/ADP (0.1/1.0 μM) were investigated in normal Purkinje fibres and in Purkinje fibres from dog surviving infarction, by using conventional micro-electrode method. Hearts were obtained from male Sprague-Dawley rats, weight 250-300 g. Purkinje fibres were dissected from hearts of mongrel dogs of either sex (10-15 kg) with or without prior myocardial infarction. FeCl 3/ADP (0.1/1.0 μM and 1.0/1.0 μ M respectively) weakly changed the incidence of reperfusion induced arrhythmias. In nicergoline pretreated hearts, in which the incidence of reperfusion arrhythmias was reduced, FeCl 3/ADP (0.1/1.0 μM) did not change the incidence and the duration of reperfusion arrhythmias. In normal Purkinje fibres, FeCl 3/ADP(0.1/1.0μM) induced a decrease in action potential duration without any pronounced effect on V(max), diastolic potential, and activation potential. In Purkinje fibres from post infarct myocardium, FeCl 3/ADP decreased action potential duration, diastolic potential, and activation potential. Free radical generation did not antagonise the antiarrhythmic activity of α adrenergic blockade. Free radical generation induced slow and minor changes in electrophysiological activity of Purkinje fibres both from normal and ischaemic hearts. Our data suggest that free radical generation may not be the only mechanism involved in the genesis of reperfusion arrhythmias. | en_US |
dc.language | eng | en_US |
dc.publisher | Oxford University Press. The Journal's web site is located at http://cardiovascres.oxfordjournals.org | en_US |
dc.relation.ispartof | Cardiovascular Research | en_US |
dc.subject | Free radical | - |
dc.subject | Infarction | - |
dc.subject | Purkinje fibres | - |
dc.subject | Reperfusion arrhythmias | - |
dc.subject.mesh | Action Potentials - Drug Effects | en_US |
dc.subject.mesh | Adenosine Diphosphate - Pharmacology | en_US |
dc.subject.mesh | Animals | en_US |
dc.subject.mesh | Arrhythmias, Cardiac - Etiology | en_US |
dc.subject.mesh | Chlorides | en_US |
dc.subject.mesh | Ferric Compounds - Pharmacology | en_US |
dc.subject.mesh | Free Radicals | en_US |
dc.subject.mesh | Male | en_US |
dc.subject.mesh | Myocardial Infarction - Physiopathology | en_US |
dc.subject.mesh | Myocardial Reperfusion Injury - Etiology | en_US |
dc.subject.mesh | Organ Culture Techniques | en_US |
dc.subject.mesh | Purkinje Fibers - Physiopathology | en_US |
dc.subject.mesh | Rats | en_US |
dc.subject.mesh | Rats, Inbred Strains | en_US |
dc.title | Effects of the free radical generating system FeCl 3/ADP on reperfusion arrhythmias of rat hearts and electrical activity of canine Purkinje fibres | en_US |
dc.type | Article | en_US |
dc.identifier.email | Man, RYK:rykman@hkucc.hku.hk | en_US |
dc.identifier.authority | Man, RYK=rp00236 | en_US |
dc.description.nature | link_to_subscribed_fulltext | en_US |
dc.identifier.doi | 10.1093/cvr/24.8.669 | - |
dc.identifier.pmid | 2224935 | - |
dc.identifier.scopus | eid_2-s2.0-85047678844 | en_US |
dc.identifier.volume | 24 | en_US |
dc.identifier.issue | 8 | en_US |
dc.identifier.spage | 669 | en_US |
dc.identifier.epage | 675 | en_US |
dc.identifier.isi | WOS:A1990DU07200011 | - |
dc.publisher.place | United Kingdom | en_US |
dc.identifier.scopusauthorid | Bril, A=7006161753 | en_US |
dc.identifier.scopusauthorid | Rochette, L=7005691376 | en_US |
dc.identifier.scopusauthorid | Verry, A=8965803000 | en_US |
dc.identifier.scopusauthorid | Maupoil, V=7004568342 | en_US |
dc.identifier.scopusauthorid | Man, RYK=7004986435 | en_US |
dc.identifier.scopusauthorid | Opie, LH=36051372200 | en_US |
dc.identifier.issnl | 0008-6363 | - |