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Correlative analysis in multi-domain processing of cardiac signals

  • US 5,029,082 A
  • Filed: 02/05/1990
  • Issued: 07/02/1991
  • Est. Priority Date: 03/30/1987
  • Status: Expired due to Fees
First Claim
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1. An apparatus for detecting and processing electrocardiogram (ECG) signals, comprising:

  • a plurality of detecting electrodes;

    detecting means, operatively connected to said plurality of detecting electrodes, for simultaneously detecting ECG signals on multiple leads and for amplifying the multi-lead ECG signals to provide multi-lead amplified ECG outputs;

    multi-channel A/D converter means, operatively connected to said detecting means, for converting synchronously amplified ECG outputs of each lead into multi-channel digital data;

    buffer memory means, operatively connected to said A/D converter means, for storing said synchronized multi-channel digital data;

    processing means or processing the stored multi-channel digital data corresponding to the detected ECG signals;

    said processing means including frequency domain processing means for fetching the stored multi-channel digital data from two selected leads corresponding to a plurality of heart beats from said buffer memory means and for performing a fast Fourier transform on each individual lead of the fetched data;

    said frequency domain processing means calculating an energy spectrum for each lead, a cross-energy spectrum and transfer function curves for said two selected leads; and

    output means, operatively connected to said processing means, for providing waveforms of the calculated results of said frequency domain processing means as an output.

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