Interdependence of Hemodynamic and Respiratory Variable in Humans

From analysis of the literature data for humans aged 1–60 years, equations were obtained relating the respiratory (respiratory minute volume, minute oxygen consumption) and hemodynamic (stroke volume) variables in males and in females. If the value of one of these three variable is known, the other two can be determined from the equations describing their relationship. For healthy adults aged 23–40 years, the calculated results differed from the experimental data by no more than ±5%. Analysis of the equations relating the hemodynamic variables to the respiratory variables suggested that oxygen consumption is regulated by different mechanisms depending on the nature of regulatory stimuli and the oxygen requirements of the body.