NASA NTRS · 19670000597
Cardiotachometer with linear beat-to-beat frequency response
Abstract
Cardiotachometer detects and displays the human heart rate during physiological studies. It provides linear response to the heart rate, records heart rate during rest and under heavy stress, provides a beat-to-beat indication of changes in heart rate, and is relatively free of interfering signals from activities other than the heart rate.
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Deboo, G. J., Pope, J. M., Smith, D. B. D.. 1967-12-01. Cardiotachometer with linear beat-to-beat frequency response. https://ntrs.nasa.gov/citations/19670000597
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