| 摘要 |
An implantable cardiac electrostimulator comprising an atrial and a ventricular sensing channel for processing intracardiac electrogram signals, for detecting signals corresponding to atrial and ventricular activity and for generating an atrial and ventricular sense event signal upon detection of such signal, respectively a VES detector operatively connected to said sensing channels and adapted to detect ventricular extrasystoles an atrial and a ventricular stimulation pulse generator and a stimulation control unit operatively connected to said stimulation pulse generators. The stimulation control unit is adapted to determine a scheduled time of delivery of an atrial (T(A)) and of a ventricular (T(V)) stimulation pulse. It is further adapted to trigger said stimulation pulse generators at the scheduled point of time T(A) or T(V), respectively, if no atrial sense event signal is generated before time out at T(A) of an atrial escape interval (VAI), or if no ventricular sense event signal is generated before time out at T(V) of a ventricular escape interval (VEI). T(A) und T(V) are determined depending upon detection of a ventricular extra systole while maintaining a proper atrioventricular synchrony by setting a physiologically adequate A-V-delay between T(A) and corresponding T(V). |
