Literature DB >> 832285

Catechol-mediated effects of harmaline on the action potential of rat atrial fibres.

R Carpentier, J Narvarte, S Sanhueza.   

Abstract

The mechanism of the transient enhancement of the amplitude of the action potential (AAP) induced by harmaline (HME) was studied in rat atria. The results show that HME increases AAP through an enhancement of the slow component responsible for the last part of the upstroke, which overcomes an inhibitory action on the initial fast component. The stimulatory effect on the slow component is mediated through adrenergic beta receptors and normally masks an alpha-dependent depressant effect.

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Year:  1977        PMID: 832285     DOI: 10.1093/cvr/11.1.39

Source DB:  PubMed          Journal:  Cardiovasc Res        ISSN: 0008-6363            Impact factor:   10.787


  3 in total

1.  Effects of harmine on transmembrane potentials of guinea-pig atrial muscle.

Authors:  R G Carpentier
Journal:  Br J Pharmacol       Date:  1980-08       Impact factor: 8.739

2.  The effect of harmine on the action potential of the guinea-pig atrial muscle depends on the external calcium concentration.

Authors:  R G Carpentier
Journal:  Br J Pharmacol       Date:  1981-10       Impact factor: 8.739

3.  Effects of harmala alkaloids on transmembrane potentials of guinea-pig papillary muscles.

Authors:  R G Carpentier
Journal:  Br J Pharmacol       Date:  1982-01       Impact factor: 8.739

  3 in total

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