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Function indicator for autonomic nervous system based on phonocardiogram

  • US 20030093002A1
  • Filed: 11/13/2001
  • Published: 05/15/2003
  • Est. Priority Date: 11/13/2001
  • Status: Abandoned Application
First Claim
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1. An apparatus to measure a heart rate variability (HRV), comprising:

  • a listening instrument to collect sound signals of a heart, wherein high frequency sounds and low frequency vibrations are transformed into electrical signals; and

    a computing system to analyze the electrical signals of the sound signals of the heart, wherein frequency-domain parameters of the electrical signals are quantified to characterize the heart rate variability.

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