In {TAIL ~ one embodiment} of the invention, {HEAD ~ the implantable stimulation device} comprises a rate responsive pacemaker, and the sensed physiological parameter used to adjust the rate threshold limit is also used to define a sensor indicated rate signal to control the pacing rate of the pacemaker 
In { TAIL ~ one embodiment } of the invention , { HEAD ~ the implantable stimulation device } comprises a rate responsive pacemaker , and the sensed physiological parameter used to adjust the rate threshold limit is also used to define a sensor indicated rate signal to control the pacing rate of the pacemaker
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