Patent ID: 6889080
Filing Date: 2005-05-03
Classification: A61N

Abstract:
1. An active implantable medical device, in particular a defibrillator/cardiovertor, having: means for delivering a therapy for treatment of tachycardia including at least one of defibrillation, cardioversion, ventricular antitachycardiac pacing and atrial antitachycardiac pacing, means for sensing the ventricular and atrial activity including R-waves and P-waves, and means for suspecting and confirming a presence of an episode of tachycardia in response to the sensed activity, said means including means for analyzing a stability of RR intervals and a stability of associated PR intervals, wherein the improvement comprises: means, operating in response to a detection of stable RR intervals and unstable PR intervals, for discriminating between atrial fibrillation with a fast ventricular rhythm and atrial fibrillation with a ventricular tachycardia, and for controlling delivery of a differentiated therapy according to said discrimination.