Ela Medical S.a.

Nicolas Iscolo

Marcel Limousin

Jean-Luc Bonnet

Remi Nitzsche

Christine Henry

Daniel Kroiss

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. The advanced discrimination modifies the classification operation by being able to add temporarily one or more criterion and/or to modify temporarily the adjustment of an existing (predetermined) criterion in case of a suspected atrial fibrillation. Added criterion include particularly a supplementary research criterion of short and/or long RR intervals, which are significantly distanced from a zone of RR interval stability, which significantly distanced zones are, for example, separated from the RR interval stability zone by a predetermined width interval, which width interval is identical on both sides of the RR interval stability zone.

Method and apparatus for advanced tachyarrhythmia discrimination

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. The improvement concerns determining the presence or the absence of a rapid acceleration of the rhythm of RR intervals, and determining, if necessary, the origin (atrial or ventricular) of such acceleration, in the case of the detection of unstable RR intervals for discriminating tachycardias.

Growing community of inventors

Saint Cyr l'Ecole, France

Nicolas Iscolo