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 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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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 leads 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 orthonormalized 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
11 Claims
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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:
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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). - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. 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 leads ; 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), wherein the means for estimating the reconstructed surface vectocardiogram (VCGreconstructed) further comprises means for applying a linear filtering to the calculated endocardial vectogram. - View Dependent Claims (9, 10)
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11. 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 leads, 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), wherein said estimating step further comprises employing a linear filtering of the first collection of EGM signals.
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Specification