Patent ID: 7239914

Claim:
A system, comprising: a signal input circuit including at least one of a cardiac sense amplifier adapted to monitor a cardiac signal and a sensor adapted to monitor a physiologic parameter; and a controller circuit, including: a predetermined state detector coupled to the signal input circuit, the predetermined state detector adapted to detect a predetermined state from the at least one of the cardiac signal and the physiologic parameter, the predetermined state including at least one of a heart rate state, a cardiac rhythm state, a patient activity state, a respiration state, and a metabolic need state; and a rate smoothing module, coupled to the predetermined state detector and including at least one rate smoothing algorithm, the rate smoothing module configured to select a first rate smoothing percentage and a second rate smoothing percentage of the rate smoothing algorithm based on whether the predetermined state is present, the first rate smoothing percentage limiting a degree of pacing rate increase, the second rate smoothing percentage limiting a degree of pacing rate drop.