Abstract: An active implantable medical device of the defibrillator/cardiovertor type with advanced tachycardia discrimination in which the device monitors the atrial and ventricular activity, suspects and confirms the presence of tachycardia episodes in the monitored activity, and operates a classification algorithm to discriminate between ventricular tachycardias and supra-ventricular tachycardias according to predetermined criteria and a given adjustment of these criteria, and to authorize the releasing of a shock therapy defibrillation, and/or cardioversion and/or anti-tachycardia ventricular stimulation in the presence ventricular tachycardias and to inhibit delivery of a shock therapy in the presence of a supra-ventricular tachycardias, or instead to release an atrial therapy.

Abstract: An active implantable medical device of the defibrillator/cardiovertor type with an improved tachycardia discrimination for utilizing the delivery of a therapy of defibrillation and/or cardioversion and/or antitachycardia stimulation in the ventricle and/or atrium. The atrial and ventricular activity is monitored, and suspected tachycardia episodes in the monitored activity is tested and confirmed, the stability of RR intervals and the stability of associated PR interval are analyzed. The classification discriminates tachycardias detected as between ventricular tachycardias and supra-ventricular tachycardias, and authorizes delivery of a shock therapy in the presence of a confirmed ventricular tachycardias, or inhibits delivery of a shock therapy in response to a confirmed supra-ventricular tachycardia. Where appropriate, the classification also releases an atrial therapy.