| 摘要 |
<p>A programmable pacemaker (10) and program therefore are disclosed, wherein the pacemaker is programmed (100, 124) to operate in a first pacing mode (102) whenever the measured atrial rate is less than a certain threshold switching rate R{T}, and to operate in a second pacing mode (118) whenever the measured atrial rate is greater than the threshold switching rate R{T}. The threshold switching rate R{T} is varied based on either a programmed algorithm or the measured value of one or more sensed parameters. In another embodiment, a hysteresis is introduced, so that the rate at which the pacemaker switches back to its low-activity mode is lower than the rate that triggers a switch to the high-activity mode.</p> |
