Active medical implantable device, in particular pacemaker, defibrillator or cardioverter, having means for eliminating artefacts of detection of events

摘要

The means for eliminating double detection's includes statistical analysis of the distribution of the values of successive intervals (t1-n) separating a series of consecutive detected events (R1-n). The analysis only determines if there are two equivalent peaks and if these peaks are distinct and if they are separated by at least an empty class and if the principal peak encompasses more than 40 percent of the total number of intervals. The implantable active cardiac stimulator includes: (a) means for detection of spontaneous events in a cardiac, ventricular or auricular cavity;means for measuring separated successive detected events;means for analyzing the cardiac rhythm operating as a function of the measured interval values, and;means for eliminating double detection of the same event, when an event is followed by a linked event which is also detected. This means includes evaluation of successive measured intervals (t1 - tn) separating a series of detected separated consecutive events (R1,R'1,R2,R'2....) identifying long and short intervals and to consider if there are any double detection's in the presence in a short time (t1,t3,t5,..) and long (t2,t4,t6,...) successive intervals.