Patent ID: 8512220

Claim:
A cardiac pacing system, comprising: a sensor configured to monitor a physiologic parameter other than intrinsic electrical cardiac depolarizations, the physiologic parameter including a physical activity: a processing circuit coupled to the sensor, the processing circuit configured to translate the physical activity into an activity level; a state detector coupled to the processing circuit, the state detector configured to detect a predetermined state of the physiologic parameter and including an activity level detector configured to determine whether the activity level matches the predetermined state of the physiologic parameter by comparing the activity level to one or more predetermined activity levels; and a controller circuit configured to determine and control a pacing rate, the controller circuit including a rate smoothing module configured to perform rate smoothing that limits a rate of change in the pacing rate, the rate smoothing module coupled to the state detector and configured to receive the physiologic parameter and activate the rate smoothing, deactivate the rate smoothing, or adjust one or more rate smoothing parameters of the rate smoothing in response to a detection of the predetermined state of the physiologic parameter.