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Reconstruction of a surface electrocardiogram based upon an endocardial electrogram

  • US 7,979,112 B2
  • Filed: 11/05/2007
  • Issued: 07/12/2011
  • Est. Priority Date: 09/25/2006
  • Status: Active Grant
First Claim
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1. A process for processing signals representative of cardiac myocardium depolarization potentials, said signals being collected by a plurality of endocardial electrodes of an active implantable medical device including an implantable pacemaker, device for resynchronization, cardioversion and/or defibrillation, the process comprising:

  • a) acquiring a plurality of endocardial electrogram signals (EGM) through a plurality of leads, each lead of the plurality of leads being collected between at least a pair of endocardial electrodes selected from the plurality of endocardial electrodes;

    b) calculating, through a combination of the plurality of endocardial electrogram signals (EGM) acquired at step a), a corresponding endocardial vectogram (VGM);

    d) estimating, based upon the endocardial vectogram calculated at step b), a reconstructed surface vectocardiogram (VCGreconstructed); and

    e) reconstructing surface electrocardiogram signals (ECG) corresponding to said reconstructed surface vectocardiogram (VCGreconstructed),wherein the step d) of estimating the reconstructed surface vectocardiogram (VCGreconstructed) further comprises applying a linear filtering to the endocardial vectogram calculated at step b).

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