Cardiac output and stroke volume in swimming harbor seals.
J Comp Physiol B
; 160(5): 473-82, 1990.
Article
em En
| MEDLINE
| ID: mdl-2097298
ABSTRACT
Cardiac output was measured by the thermodilution method in three young harbor seals, at rest and while swimming up to the maximum effort for which they could be trained. Stroke volume was determined by counting heart rate simultaneously with determination of cardiac output. Cardiac outputs varied widely between surface breathing (7.8 ml.kg-1.s-1) and breath-holding while swimming under water (1.8 ml.kg-1.s-1). Stroke volume while at the surface was almost twice the volume while submerged. Surface cardiac output was always near maximal despite work effort, whereas submerged cardiac output gradually increased at higher work efforts. The cardiovascular performance of seals at the maximum MO2 we could induce from them is equivalent to that of the domestic goat.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Volume Sistólico
/
Natação
/
Débito Cardíaco
/
Focas Verdadeiras
Limite:
Animals
Idioma:
En
Revista:
J Comp Physiol B
Assunto da revista:
BIOQUIMICA
/
FISIOLOGIA
/
METABOLISMO
Ano de publicação:
1990
Tipo de documento:
Article