[The energy characteristics of cardiorespiratory system function in patients with chronic bronchitis under graded...

On the basis of 38 spiroveloergometries performed in 20 patients with chronic bronchitis (ChB) there have been calculated energy characteristics of the function of the cardiorespiratory system (power of the heart, respiratory muscles and erythron, effectiveness of capturing of oxygen in the cardiac, pulmonary, erythron links and in the oxygen transport system as a whole) while they were doing their graded exercise. Mathematical simulation (factor analysis) permitted identification of two levels of work load (> and < 80 Wt) differing widely in their physiological and energy maintenance. A conclusion is substantiated and validated that loads under 80 Wt appear to be preferable, corresponding to the area of optimal, in terms of energy maintenance, functioning of the cardiorespiratory system of ChB patients (strategy of increasing the oxygen consumption at the expense of the predominant augmentation of the adequate volume in proportion to enlargement of the stroke volume).