Influence of temperature on isometric contractions of rabbit atria during inotropic interventions.
Acta Physiol Lat Am
; 29(2-3): 131-5, 1979.
Article
em En
| MEDLINE
| ID: mdl-263167
Inotropic effects on strips of left atria promoted by 1-epinephrine, increase in frequency, post-extrasystolic potentiation, and by increase in extracellular calcium concentration were studied at 28 C and 36 C. The results show that at lower temperature the resulting changes in temporal parameters (activation time, deactivation time and duration above 10% of maximum force) are greater than those at the higher temperature. AT 36 C inotropic interventions have more prominent effects on the tension development and its first derivative, while changes in temporal parameters become less conspicuous. It is concluded that the inotropic interventions regulate the strength of contraction more effectively at 36 C and the temporal aspects of contraction more effectively at 28 C.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Temperatura
/
Contração Miocárdica
Limite:
Animals
Idioma:
En
Revista:
Acta Physiol Lat Am
Ano de publicação:
1979
Tipo de documento:
Article
País de publicação:
Argentina