A device for analysing an endocardial acceleration, EA, signal, comprising means for processing the EA signal with: - means for continuously collecting an EA signal over a sequence of N cardiac cycles; - means for cutting the collected EA signal into EA sub-signals, each over the duration of a cardiac cycle; - separator means, adapted to isolate in each of the EA sub-signals, over the duration of a respective analysis window, at least one EAx component associated with one of the cardiac noises S1, S2, S3 or S4 for this sub-signal; - means (12, 14, 14') for operating an intercorrelation between the EA sub-signals of said at least one EAx component, adapted to:. define a reference cycle,. determine for each cycle the coefficient of correlation and the time offset of the EAx component with respect to the reference cycle, and. operate a relative time adjustment of the EAx component with respect to the reference cycle; - selection means, adapted to apply to the EA sub-signals and to the associated EAx components of the sequence of N cardiac cycles a series of validation criteria and to retain only the N' cycles fulfilling these criteria, with N' ≤ N; - means for averaging the N' cardiac cycles, adapted to deliver as an output a global mean EA signal over one cycle; - detection means, adapted to detect a change of state of the patient or the occurrence of a predetermined event in the patient; and - means (26, 28) for the dynamic adaptation of the processing means, adapted to modify, over a detection of said change of state or said predetermined event, at least one of said validation criteria and/or at least one of the parameters of the processing means, characterized in that the means for the dynamic adaptation of the processing means are means adapted to modify at least one of the following parameters:. number N of cycles of the sequence collected and processed; and. pitch separating two successive sequences collected and processed, and in that the means for the dynamic adaptation of the processing means are means adapted to modify at least one of the following validation criteria:. minimum threshold for said coefficient of correlation with respect to the reference cycle;. maximum threshold for said time offset with respect to the reference cycle;. minimum number of cycles for the N' cycles retained by the selection means; and. in case of a plurality of EAx components isolated in each of the EA sub-signals, selecting the only EA sub-signals all the associated EAx components of which fulfil the validation criteria. - means for continuously collecting an EA signal over a sequence of N cardiac cycles; - means for cutting the collected EA signal into EA sub-signals, each over the duration of a cardiac cycle; - separator means, adapted to isolate in each of the EA sub-signals, over the duration of a respective analysis window, at least one EAx component associated with one of the cardiac noises S1, S2, S3 or S4 for this sub-signal; - means (12, 14, 14') for operating an intercorrelation between the EA sub-signals of said at least one EAx component, adapted to:. define a reference cycle,. determine for each cycle the coefficient of correlation and the time offset of the EAx component with respect to the reference cycle, and. operate a relative time adjustment of the EAx component with respect to the reference cycle;. define a reference cycle,. determine for each cycle the coefficient of correlation and the time offset of the EAx component with respect to the reference cycle, and. operate a relative time adjustment of the EAx component with respect to the reference cycle; - selection means, adapted to apply to the EA sub-signals and to the associated EAx components of the sequence of N cardiac cycles a series of validation criteria and to retain only the N' cycles fulfilling these criteria, with N' ≤ N; - means for averaging the N' cardiac cycles, adapted to deliver as an output a global mean EA signal over one cycle; - detection means, adapted to detect a change of state of the patient or the occurrence of a predetermined event in the patient; and - means (26, 28) for the dynamic adaptation of the processing means, adapted to modify, over a detection of said change of state or said predetermined event, at least one of said validation criteria and/or at least one of the parameters of the processing means,. number N of cycles of the sequence collected and processed; and. pitch separating two successive sequences collected and processed,. minimum threshold for said coefficient of correlation with respect to the reference cycle;. maximum threshold for said time offset with respect to the reference cycle;. minimum number of cycles for the N' cycles retained by the selection means; and. in case of a plurality of EAx components isolated in each of the EA sub-signals, selecting the only EA sub-signals all the associated EAx components of which fulfil the validation criteria.