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Dynamic spectral phonocardiograph

  • US 5,012,815 A
  • Filed: 06/05/1990
  • Issued: 05/07/1991
  • Est. Priority Date: 02/02/1989
  • Status: Expired due to Term
First Claim
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1. A method of producing automated diagnosis of heart disease in a patient from irregular heart sound patterns at different portions of a heart cycle, comprising steps of:

  • a. producing a computer-based catalog of sets of first spectral expansion coefficients based on Fourier analysis of heart sounds from previous diagnosis of representative cases of irregular heart ground patterns;

    b. producing a set of second spectral expansion coefficients based on Fourier analysis of heart sounds for a particular unknown example of irregular heart ground patterns;

    c. performing generalized scalar products of the set of second spectral expansion coefficients with each of said sets of first expansion coefficients and for producing a heart disease identification signal based on a maximum value of the generalized scalar products.

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