ACTIVE IMPLANTABLE MEDICAL DEVICE, IN PARTICULAR A CARDIAC STIMULATOR, DEFIBRILLATOR AND / OR CARDIOVERTER OF THE AUTOMATIC DDD / AAI MODE SWITCHED TYPE

摘要

P This device comprises means for collecting spontaneous atrial and ventricular events, means for detecting an atrioventricular block and means for ventricular and atrial stimulation, the ventricular stimulation being applied on detection of an atrial block. ventricular (AVB), after expiration of a programmed atrioventricular delay triggered on an atrial event. It also includes means (12-24) capable of discriminating the paroxysmal or chronic character of AVB. It further comprises means (26) capable, in the event of proven chronic AVR, to deactivate the automatic mode switching, to switch to DDD mode and to reprogram the atrioventricular delay to a shorter value. The means of discrimination (12-24) may include means (12-20) capable, in a first phase, of suspecting a chronic AVB, and means (22, 24) capable, in a second phase, of confirming the presence chronic BAV in case of consecutive suspicions of chronic BAV for a predetermined period. /P