| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an active implantable medical device, such as a pacemaker, cardioversion and/or defibrillator of AAI or AAI/DDD type, with detection of ventricular tachycardiae. <P>SOLUTION: This device senses spontaneous ventricular and atrial events; delivers atrial pacing pulses; and is able to apply, after delivery of an atrial pacing pulse, concurrently with sensing ventricular events, a refractory period PR and a safety window FS of predetermined durations; and determining the beginning of a spontaneous ventricular cycle in response to sensing of a ventricular event out of the safety window R0, R1, R1, R2, R3, it further includes detecting ventricular tachycardiae in response to sensing of ventricular events occurring both within and out of the safety window, conditioned notably by the detection of a sequence of events including, between two consecutive atrial pacing pulses A1, A2; A2, A3, one ventricular event r1, r2 occurring within the safety window and one subsequent ventricular event occurring out of the safety window R1, R2. <P>COPYRIGHT: (C)2007,JPO&INPIT |
