Patent ID: 8359089

Claim:
A device for processing signals representative of a cardiac potential of depolarization of the myocardium, comprising: means for collecting a ventricular EGM signal (EGM V ) and an atrial EGM signal (EGM A ); means for extracting a ventricular far field signal component (FF V ) from the collected ventricular EGM signal (EGM V ) and an atrial far field, signal component (FF A ) from the collected atrial EGM signal (EGM A ); and means for reconstructing a surface electrocardiogram (ECG) from the ventricular far field signal component and the atrial far field signal component, and delivering an output signal of a reconstructed surface electrocardiogram (ECG j *), wherein: the means for extracting the ventricular far field signal component and the atrial far field signal component comprises, for each of a ventricular derivation and an atrial derivation: means ( 22 , 28 ) for detecting a spontaneous or stimulated (P, R) depolarization wave, receiving as an input the EGM signal and delivering as an output a corresponding pulse signal; a near field estimator filter ( 24 , 30 ), receiving as an input the pulse signal and delivering as an output a near field signal component (NF A , NF V ); and means ( 26 , 32 ) for subtracting from the EGM signal (EGM A , EGM V ) the near field signal component (NF A , NF V ) and for delivering as an output said far field signal component (FF A , FF V ); and the means for reconstructing an ECG include: a ventricular far field estimator filter ( 18 ), receiving as an input, said ventricular far field component signal and delivering as an output a filtered ventricular far field signal component; an atrial far field estimator filter ( 16 ), receiving as input said atrial far field signal component and delivering as an output a filtered atrial far field signal component; and an adder ( 20 ) adding the filtered ventricular and atrial far field signal components and delivering as output said reconstructed surface electrocardiogram signal.