Method and apparatus for monitoring the autonomic nervous system using non-stationary spectral analysis of heart rate and respiratory activity

  • US 7,079,888 B2
  • Filed: 03/12/2003
  • Issued: 07/18/2006
  • Est. Priority Date: 04/11/2002
  • Status: Active Grant
First Claim
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1. A method for measuring activity of the autonomous nervous system of a patient comprising the steps of:

  • 1) obtaining instantaneous heart rate signals of said patient;

    2) computing a first power spectrum from said instantaneous heart rate signals using non-stationary signal analysis;

    3) determining a level of sympathetic activity and parasympathetic activity from said power spectrum;

    4) obtaining respiratory activity signals of said patient;

    5) computing a second power spectrum from said respiratory signals using non-stationary signal analysis; and

    ,6) determining the instantaneous respiration frequency from the said second power spectrum.

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