Effect of ventilation on systemic blood flow evaluated by echodopplercardiography
Braz. j. med. biol. res
;
30(5): 689-91, May 1997. tab, graf
Article
in English
| LILACS
| ID: lil-196684
RESUMO
Systemic blood flow (Q) was measured by echodopplercardiography in 5 normal young adult males during apnea, eupnea and tachypnea. Measurements were made in a recumbent posture at 3-min intervals. Tachypnea was attained by doubling the respiratory frequency at eupnea at a constant tidal volume. An open glottis was maintained during apnea at the resting respiratory level. The Q values were positively correlated with the respiratory frequency, decreasing from eupnea to apnea and increasing from eupnea to tachypnea (P<0.05). These data demonstrate that echodopplercardiography, a better qualified tool for this purpose, confirms the positive and progressive effects of ventilation on systemic blood flow, as suggested by previous studies based on diverse technical approaches.
Full text:
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Index:
LILACS (Americas)
Main subject:
Apnea
/
Blood Flow Velocity
/
Cardiac Output
/
Pulmonary Ventilation
Limits:
Adult
/
Humans
/
Male
Language:
English
Journal:
Braz. j. med. biol. res
Journal subject:
Biology
/
Medicine
Year:
1997
Type:
Article
/
Congress and conference
/
Project document
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