Patent ID: 8359096

Claim:
An active implantable medical device for resynchronization by biventricular pacing, comprising: means for detecting atrial and ventricular events; means for stimulating right and left ventricles; at least one sensor ( 18 ) delivering a hemodynamic signal (Z) representative of a patient's current hemodynamic parameter; means for applying to the means for stimulating an atrio-ventricular delay AVD, the AVD being counted from the detection of a spontaneous or paced atrial event until a pacing of the right ventricle is applied in the absence of a sensed spontaneous ventricular event; means for applying to the means for stimulating an inter-ventricular delay VVD between the respective moments of stimulation of the right and left ventricles; and closed-loop means ( 22 ), for continuously monitoring the AVD and the VVD according to the hemodynamic signal delivered by the at least one sensor, means for generating an error signal of AVD ( 34 ) according to the hemodynamic signal delivered by said at least one sensor ( 18 ), the error signal of AVD (E AVD ) being representative of a difference between the AVD and an optimum value of the AVD (AVD opt ), the means for generating an error signal of AVD comprising means for modulating ( 38 ) and demodulating ( 42 ) the AVD; means for generating an error signal of VVD ( 34 ) according to the hemodynamic signal delivered by said at least one sensor ( 18 ), the error signal of VVD (E VVD ) representative of a difference between a current value of the VVD and an optimum value of VVD (VVD opt ), the means for generating an error signal of VVD comprises means for modulating ( 48 ) and demodulating ( 52 ) the VVD being functionally interdependent with the means for modulating ( 38 ) and demodulating ( 42 ) the AVD; a closed-loop regulator ( 36 ) for controlling the AVD, receiving as input said error signal of AVD (E AVD ) and outputting a signal of AVD; and a closed-loop regulator ( 46 ) for controlling the VVD, receiving as input said error signal of VVD (E VVD ) and outputting a signal of VVD.