The active implantable medical device, in particular a cardiac pacemaker defibrillator, cardiovertor type or multisite device, comprising means for detection of a risk situation of melting

摘要

This device is of the double chamber type, comprising means of detection of atrial events, and a ventricular arrhythmia, atrial stimulation, and means of a ventricular stimulation, able to deliver a pulse of ventricular stimulation (v) after a delay (avd) atrio - ventricular programmed as a result of the detection of an atrial event (p, a) and in the absence of detection of a spontaneous ventricular event (r) in this time period. The detection means of situations of melting analyze a sequence of successive cardiac cycles, by modifying the delay atrio - ventricular of a cycle to the other (avd, avd + 31, the avd + 63), to detect the presence or absence of a spontaneous ventricular event (r) occurring in the interior of the delay atrio - ventricular thus modified, and determine the existence of a risk of melting in the case of occurrence of a spontaneous ventricular event during at least one of the cycles of the sequence.