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Apparatus for measuring cardiac signals, using acoustic and ecg signals

  • US 5,685,317 A
  • Filed: 03/05/1996
  • Issued: 11/11/1997
  • Est. Priority Date: 06/02/1993
  • Status: Expired due to Fees
First Claim
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1. An apparatus for the measurement of the heart valve function of a person'"'"'s heart comprising a vibration transducer for detecting an acoustic signal at the outer surface of the person'"'"'s body, a pre-emphasis filter for filtering the acoustic signal to compensate for the degree of obesity of the person, an input for receiving an input electrocardiographic signal from the person'"'"'s body, an electronic circuit for obtaining a synchronizing signal from the input electrocardiographic signal, and a spectrum analyzer for determining the relative energy distribution in at least one lower and at least one higher frequency range, of the filtered acoustic signal the spectrum analyzer being synchronized by the synchronizing signal.

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