13-03-2014 дата публикации
Номер: US20140073894A1
An active medical device using non-linear filtering for the reconstruction of a surface electrocardiogram (ECG) from an endocardial electrogram (EGM) is disclosed. The device for the reconstruction of the surface ECG comprises: a plurality of inputs, receiving a corresponding plurality of EGM signals from endocardial or epicardial electrogram (x[n], x[n]), each collected on a respective EGM derivation of a plurality of EGM derivations, and at least one output delivering a reconstructed surface ECG electrocardiogram signal (y[n]), related to an ECG derivation, and a non-linear digital filter () with a transfer function that determines the reconstructed ECG signal based on said plurality of input EGM signals. The non-linear digital filter includes a Volterra filter type (″) whose transfer function includes a linear term (h1) and at least one quadratic (h2) and/or cubic (h3) term(s). 1. A device for processing signals representative of a cardiac potential of depolarization of the myocardium for reconstruction of a surface electrocardiogram (ECG) , comprising:{'sub': 1', '2', 'Q, 'b': '10', 'a plurality of inputs, corresponding to a plurality of EGM signals from endocardial or epicardial electrogram (x, x. . . x,) each acquired on a respective EGM derivation of a plurality of EGM derivations ();'}{'b': '16', 'at least one output delivering a reconstructed surface electrocardiogram ECG signal (yj), relative to an ECG () derivation; and'}{'sub': 1', '2', 'Q', '1', '2', '3, 'b': 12', '14', '12', '12', '14', '12', '52, 'a non-linear digital filter including a Volterra type filter (F, F. . . F) (, , ′, ″, , , ) with a transfer function that reconstructs said ECG signal derivation based on said plurality of inputs, said transfer function including a linear term (h) and at least one quadratic (h) and/or cubic (h) term(s).'}2. The device of claim 1 , wherein the transfer function of the non-linear digital filter further comprises at least a finite time delay (z).3. The device ...
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