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System and method for non-invasive electrocardiographic imaging

  • US 20020128565A1
  • Filed: 10/19/2001
  • Published: 09/12/2002
  • Est. Priority Date: 07/31/1997
  • Status: Active Grant
First Claim
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1. A method for noninvasively determining electrical activity on a surface of a heart of a living being, the being having a torso with an exposed body surface surrounding the heart, the method comprising steps of:

  • determining electrical potentials at a plurality of locations on the body surface of the being by monitoring electrodes that are positioned to detect electrical potentials at the plurality of locations;

    repeating the determining at predetermined intervals over a predetermined period of time;

    generating body surface potential maps that represent a distribution of the electrical potentials determined over the predetermined period of time;

    determining an epicardial envelope surrounding the heart;

    determining a geometry of the torso of the being;

    determining locations of the electrodes;

    determining a position of the heart within the torso;

    determining a matrix of transformation using a boundary element method based on the epicardial envelope, the geometry, the locations of the electrodes and the position of the heart within the torso;

    regularizing the matrix of transformation;

    determining an electrical potential distribution over the surface of the heart based on the regularized matrix of transformation and the body surface potential map.

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