RECONSTRUCTION OF A SURFACE ELECTROCARDIOGRAM BASED UPON AN ENDOCARDIAL ELECTROGRAM
First Claim
1. A process for processing signals representative of cardiac myocardium depolarization potentials, said signals being signals collected by a plurality of endocardial electrodes of an active implantable medical device such as an implantable pacemaker, device for resynchronization, cardioversion and/or defibrillation, comprising:
- a) acquiring a plurality of endocardial electrogram signals (EGM) through a plurality of endocardial or intravascular derivations, defined based upon said endocardial electrodes;
b) calculating, through a combination of the 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) calculating surface electrocardiogram signals (ECG) corresponding to said reconstructed surface vectocardiogram (VCGreconstructed).
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Accused Products
Abstract
The reconstruction of a surface electrocardiogram based upon an endocardial electrogram. This method includes: (a) acquisition (10) of a plurality of endocardial electrogram signals (EGM) through a plurality of endocardial derivations defined based upon endocardial electrodes; (b) calculation (12), by combining the endocardial electrogram (EGM) signals acquired at step (a), of the corresponding endocardial vectogram (VGM); (c) angular resealing (14) of the orthonormated mark of the endocardial vectogram (VGM) with that of the surface vectocardiogram (VCG); (d) estimation (16), based upon the endocardial vectogram (VGM) calculated at step (b), of a reconstructed surface vectocardiogram (VCGreconstructed); and (e) calculation (18) of the surface electrocardiogram (ECG) corresponding to said reconstructed surface vectocardiogram (VCGreconstructed).
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Citations
37 Claims
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1. A process for processing signals representative of cardiac myocardium depolarization potentials, said signals being signals collected by a plurality of endocardial electrodes of an active implantable medical device such as an implantable pacemaker, device for resynchronization, cardioversion and/or defibrillation, comprising:
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a) acquiring a plurality of endocardial electrogram signals (EGM) through a plurality of endocardial or intravascular derivations, defined based upon said endocardial electrodes; b) calculating, through a combination of the 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) calculating surface electrocardiogram signals (ECG) corresponding to said reconstructed surface vectocardiogram (VCGreconstructed). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. Apparatus for processing signals representative of cardiac myocardium depolarization potentials, comprising:
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a) means for acquiring a plurality of endocardial electrogram signals (EGM) representative of a plurality of endocardial or intravascular derivations; b) means for calculating, based on a combination of said acquired endocardial electrogram signals (EGM), a corresponding endocardial vectogram (VGM); c) means for estimating, based upon the calculated endocardial vectogram, a reconstructed surface vectocardiogram (VCGreconstructed); and d) means for calculating surface electrocardiogram signals (ECG) corresponding to said reconstructed surface vectocardiogram (VCGreconstructed). - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 35, 36, 37)
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29. A software control module for processing signals representative of cardiac myocardium depolarization potentials, comprising:
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a) a first instruction set for acquiring a plurality of endocardial electrogram signals (EGM) representative of a plurality of endocardial or intravascular derivations; b) a second instruction set for calculating, based on a combination of said acquired endocardial electrogram signals (EGM), a corresponding endocardial vectogram (VGM); c) a third instruction set for estimating, based upon the calculated endocardial vectogram, a reconstructed surface vectocardiogram (VCGreconstructed); and d) a fourth instruction set for calculating surface electrocardiogram signals (ECG) corresponding to said reconstructed surface vectocardiogram (VCGreconstructed). - View Dependent Claims (30, 31, 32, 33)
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34. A process for continuous calculation of a reconstructed surface vectocardiogram (VCGreconstructed) comprising:
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estimating a matrix for converting a first collection of endocardial electrogram signals (EGM) to a corresponding endocardial vectogram (VGM), acquiring at least one second collection of EGM subsequent to said first collection of EGM through a plurality of endocardial or intravascular derivations, defined based upon said endocardial electrodes; applying said estimated matrix to each said at least one second collection of EGM to determine a corresponding estimated VGM, estimating, based upon the estimated VGM, a reconstructed surface vectocardiogram (VCGreconstructed); and calculating a surface electrocardiogram signals (ECG) corresponding to said reconstructed surface vectocardiogram (VCGreconstructed).
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Specification