Effect of ventilation on systemic blood flow evaluated by echodopplercardiography

Brazilian Journal of Medical and Biological Research

M. Rigatto¹  A.f.f. Pinotti¹ 

关键词: ventilation and circulation;    apnea and systemic blood flow;    tachypnea and systemic blood flow;    cardiac output;   

DOI  :  10.1590/S0100-879X1997000500019

来源: SciELO

【 摘 要 】

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

【 授权许可】

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