Patent ID: 8359091

Claim:
An active medical device ( 10 , 12 ), for collecting electrical activity signals of a patient's heart over a series of cardiac cycles, comprising: means for collecting concurrently at least two endocardial electrogram (EGM) signals, the at least two EGM signals being collected on different respective channels and derived from a single cavity of the patient's heart; means for producing at least two distinct temporal components from said at least two EGM signals; and means for analyzing and filtering said at least two EGM signals for an analyzed cardiac cycle of the series of cardiac cycles, wherein the means for analyzing and filtering comprises: means for constructing a two-dimensional (2D) non-temporal characteristic (VGM) representative of said analyzed cardiac cycle, as a function of one of said at least two temporal components with respect to the other of said at least two temporal components; means for analyzing morphologically the 2D non-temporal characteristic (VGM) and delivering at least one descriptor parameter of said 2D non-temporal characteristic (VGM); and means for classifying said analyzed cardiac cycle as one of an invalid noisy cycle and a valid non-noisy cycle, based on said at least one descriptor parameter.