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Locating J-points in electrocardiogram signals

  • US 10,188,305 B2
  • Filed: 06/30/2016
  • Issued: 01/29/2019
  • Est. Priority Date: 07/09/2015
  • Status: Active Grant
First Claim
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1. A method for locating a J-point in a cardiac cycle waveform, the method being implemented by one or more data processors forming part of at least one computing device, the method comprising:

  • receiving electrocardiogram (ECG) data derived from an ECG electrode set affixed to a patient, the ECG data comprising a sequence of cardiac cycle waveforms that each correspond to a single cardiac cycle, each waveform comprising a series of samples;

    locating, for each cardiac cycle waveform, an R-peak, an S-peak, and a T-peak;

    calculating, for each cardiac cycle waveform, a Euclidian distance between the R-Peak and each of a plurality of samples within a window of samples;

    locating a J-point for each cardiac cycle waveform by identifying, as a location of the J-point in the cardiac cycle waveform, a sample from among the plurality of samples having the shortest Euclidian distance to the R-peak; and

    determining a physical state of the patient based on the J-point located in at least one cardiac cycle waveform.

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