A cardiac pacer for pacing a heart.

摘要

A cardiac pacer, which generates pacing pulses at a predetermined basic pacing rate, includes a device for sensing physical activity and for generating a control signal dependent thereon. It further comprises a device for varying the predetermined basic pacing rate dependent on the control signal, a device (37-43) for monitoring when the pacing rate runs at least at a predetermined high rate for a predetermined time period and for generating an output signal if said high rate is reached and a device (34, 35) for forcing the pacing rate back to a lower rate dependent on said output signal.