Active implantable medical device of AAI/DDD type, notably cardiac pacemaker, comprising means for automatic mode adjustment at the implantation

An active implantable medical device of a cardiac pacemaker, defibrillator and/or cardioverter comprising:

• means for detecting spontaneous atrial and ventricular events including atrio-ventricular conduction;
• means for mode commutation conditionally commutating between an AAI mode with ventricular sensing and a DDD mode;
• means for automatic detection of implantation;
• means for mode adaptation activated over a period of adaptation after detecting implantation by said means for automatic detection of implantation, said means for mode adaptation temporarily operating the device in said AAI mode and sensing a ventricular activity signal over the period of adaptation;
• and
• means for analyzing the ventricular activity signal sensed over the period of adaptation to detect a conduction disorder over the period of adaptation,
• wherein the means for mode adaptation determines pacing mode of the device after the period of adaptation by,
• in a presence of the conduction disorder, setting the device in the DDD mode and inhibiting the means for mode commutation, and
• in an absence of the conduction disorder, setting the device in the AAI mode with ventricular sensing and activating the means for mode commutation.