Patent ID: 7031772

Claim:
A method for performing rate responsive control in an implantable medical device, comprising: acquiring an internal sensor data using an internal sensor operatively coupled with said implantable medical device; generating at least one setpoint for controlling a rate of therapy, said setpoint based upon said internal sensor data; performing a scaling factor adjustment process for scaling said internal sensor data to correlate said internal sensor data to said setpoint; and adjusting said rate of therapy based upon said scaling factor adjustment, wherein performing said scaling factor adjustment process further comprises: performing a rate profile optimization (RPO) process to determine a rate profile; generating an activities of daily living (ADL) setpoint based upon said RPO; increasing said ADL setpoint based upon a determination that said ADL setpoint is below a lower boundary of an acceptable therapy rate; setting an activity scaling factor to one in response to at least one of increasing said ADL setpoint and a determination that said ADL setpoint is within said lower boundary and an upper boundary of an acceptable therapy rate; calculating a multiplier of said ADL setpoint, in response to a determination that said ADL setpoint is above said upper boundary, said multiplier being egual to a factor by which said ADL setpoint is above said upper boundary; and adjusting said scaling factor to match said multiplier.