Patent ID: 6711441
Filing Date: 2004-03-23
Classification: A61N

Abstract:
An active implantable medical device, in particular a pacemaker, defibrillator or cardiovertor, having:stimulating means for delivering to a heart stimulation pulses presenting a predetermined amplitude and a duration; means for adjusting the amplitude of said stimulation pulses, including: means for calibrating the stimulation pulse, means for delivering the stimulation pulse at effectively a null voltage, and means for measuring automatically a ventricular capture threshold, including means for detecting a presence or an absence of a capture consecutive to the stimulation pulse; means for determining the presence of a fusion situation in response to the detection of the presence of a capture in response to the stimulation pulse delivered at effectively null voltage; and means for invalidating the adjustment of the stimulation pulse's amplitude in response to the determination of the presence of a fusion situation.