Symposium on work and the heart
Detecting the threshold of anaerobic metabolism in cardiac patients during exercise

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Abstract

The measurement of the respiratory gas exchange ratio (R) during a standard exercise test is used to detect the onset of anaerobic metabolism during exercise, which results from failure of the cardiovascular system to supply the oxygen requirements of the tissues. The method described uses end-tidal gas concentrations to calculate R while the exercise test is taking place. Blood sampling is unnecessary, and the results can be determined during the test, thus avoiding exhaustive exercise. The method provides an objective measurement of one of the factors influencing exercise tolerance.

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  • Cited by (0)

    This investigation was supported in whole by U. S. Public Health Service Research Grants HE 06591 and HE 06285 from the National Institutes of Health.

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