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Implantable electrostimulator

An implantable cardiac electrostimulator comprising an atrial sensing channel for processing intracardiac electrogram signals and for detecting signals corresponding to atrial activity and for generating an atrial sense event signal upon detection of a signal corresponding to atrial activity, a ventricular sensing channel for processing intracardiac electrogram signals and for detecting signals corresponding to ventricular activity and for generating a ventricular sense event signal upon detection of a signal corresponding to ventricular activity, a VES detector being operatively connected to said atrial and ventricular sensing channel and being adapted to detect ventricular extrasystoles an atrial stimulation pulse generator a ventricular stimulation pulse generator a stimulation control unit being operatively connected to said atrial stimulation pulse generator and said ventricular stimulation pulse generator. The stimulation control unit is adapted to determine a scheduled time of delivery of an atrial stimulation pulse (T(A)) and a scheduled time of delivery of ventricular stimulation pulse (T(V)). The stimulation control unit is further adapted to trigger said atrial stimulation pulse generator or said ventricular stimulation pulse generator at the scheduled point of time T(A) or T(V), respectively, if no atrial sense event signal is generated before time out of an atrial escape interval (VAI), said atrial escape interval timing out at T(A), or if no ventricular sense event signal is generated before time out of a ventricular escape interval (VEI), said ventricular escape interval timing out at T(V), respectively. 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).
Owner:BIOTRONIK SE & CO KG
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