The active medical device of the type defibrillator / cardiovertor type implantable a discrimination improved tachycardia

摘要

This device comprises: & br / - means of delivery of a defibrillation therapy and / or cardioversion and / or antitachycardia and / or ventricular stimulation to atrial; means for collection of the atrial and ventricular activity; means to indicate and to confirm the presence of tachycardia in the activity is thus collected, these means comprising means for analysing the stability of the rr intervals and the stability of the associated with pr intervals; the classification means (110 - 140), able to discriminate between the thus detected tachycardia ventricular tachycardia and above - ventricular tachycardia, and means for selectively (1) to control the means for delivery of the therapy in the presence of a ventricular tachycardia or (ii) inhibit these same means in the presence of the above - ventricular tachycardia or trigger an atrial therapy. & br / according to the invention, the classification means further include means (170) able to determine the presence or absence of a sudden acceleration of the rate of the rr intervals, and to determine the appropriate, the atrial or ventricular origin of such an acceleration, these means are operating in the case of the detection of unstable rr intervals.