Rate-responsive pacemaker.

摘要

The slope and threshold of the rate responsive pacemaker are automatically adjustable to suit the physiological requirements of the user. For threshold adjustment, the user performs a resting level of exertion and the sensor (3) signal is switched (14) to a threshold value generator (15) where its peak value is stored as the threshold value. For slope adjustment, a target pacing rate is supplied to a store (17) by a programmer (13). The user performs a predetermined constant level of exertion. The resulting pacing rate is compared with the stored target rate in a comparator. The slope is adjusted (16) until the rates are equal. The value of slope is then stored (16). The sensor (3) may sense any suitable biological variable.