The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 09, 1999
Filed:
Oct. 23, 1997
Remi Nitzsche, Gambais, FR;
Jean-Luc Bonnet, Montrouge, FR;
Nicolas Iscolo, Saint Cyr L'Ecole, FR;
Marcel Limousin, Montrouge, FR;
Christine Henry, Paris, FR;
Daniel Kroiss, Schweighouse, FR;
ELA Medical S.A., Montrouge, FR;
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. 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.