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Methods for real-time autonomic nervous system monitoring using total heart rate variability, and notched windowing

DC
  • US 7,529,579 B2
  • Filed: 07/11/2005
  • Issued: 05/05/2009
  • Est. Priority Date: 07/09/2004
  • Status: Expired due to Fees
First Claim
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1. A method for power spectral analysis of heart rate variability comprising the steps of:

  • capturing a sample set of spline-interpolated heartbeat EKG signals;

    applying a modified Bartlett window to a waveform of the captured sample set;

    subjecting the windowed waveform to short-time Fourier transform (STFT); and

    isolating a respiratory frequency area (RFA) from a low frequency area (LFA).

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