Sex differences in cardiac responses to successive apnea periods.
Aviat Space Environ Med
; 53(5): 485-8, 1982 May.
Article
em En
| MEDLINE
| ID: mdl-7092758
ABSTRACT
Cardiac response to breath-holding is generally described as a bradycardia, which is explained by a two-fold mechanism involving the pulmonary mechanoreceptors and the arterial chemoreceptors. This study was conducted to determine the cardiac effects of five successive apnea periods separated by 1 min of free ventilation (FV). Heart rate (HR) and ventilation (V, VT, f) were measured during this protocol in 12 young subjects (6 men, 6 women). Ventilatory responses during FV periods were similar in both sexes, but HR responses were different during the apnea periods. The mean exhibited a bradycardia and the women a tachycardia. Although the statistical significance of the results was weak, they showed a clear tendency which was interpreted as differences in central cardioventilatory interactions. Sex difference in the cardiac consequences of static work from respiratory muscle is also evoked.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Apneia
Limite:
Adult
/
Female
/
Humans
/
Male
Idioma:
En
Ano de publicação:
1982
Tipo de documento:
Article