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METHOD OF ENHANCING THE SIGNAL-TO-NOISE RATIO (SNR) OF MEASURED ELECTROCARDIOGRAM (ECG) SIGNALS AND A CARDIAC DEVICE FOR USE IN DETECTING HEARTBEATS

  • US 20140088399A1
  • Filed: 08/22/2013
  • Published: 03/27/2014
  • Est. Priority Date: 09/21/2012
  • Status: Active Grant
First Claim
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1. A method of enhancing the signal-to-noise ratio (SNR) of measured electrocardiogram (ECG) signals, the method comprising the steps of:

  • providing at least three cardiac input signals derived from the measured ECG signals;

    forming a first estimate U1 from each of at least three pairs of input signals;

    forming a second estimate U2 from each of at least three input signals;

    comparing the polarity and the amplitude of a first and second estimate U1, U2 to at least one threshold T;

    generating a composite signal X, wherein the polarity and the amplitude of the composite signal X depend on the result of the comparison; and

    using the generated composite signal X to produce an output signal with enhanced signal-to-noise ratio (SNR).

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