Patent ID: 6738665
Filing Date: 2004-05-18
Classification: A61N

Abstract:
An active implantable medical device, having a means for delivering to the heart pulses of low energy for the treatment of the disorders of the cardiac rate, including: means for detecting atrial cardiac events (EvtA) and determining an average atrial-atrial interval; means for providing a first window in response to each atrial event having a first duration for discriminating atrial extrasystoles with earlier or average prematurity; means for applying a detected atrial event to said first window and determining a sinusal atrial rate from atrial events; means for reacting to a variation of the determined sinusal atrial rate, wherein the improvement comprises:means for providing a second window in response to each atrial event, having a second duration (DLE) longer than said first duration, forming an atrial refractory period for discriminating late atrial extrasystoles with low prematurity, the second duration being a variable duration, defined as a fraction of the determined average atrial-atrial interval (AAI); means for applying said detected atrial event to said second window; and means for temporarily inhibiting said reacting means, in response to a detection of an atrial event inside the second window.