Patent ID: 7248923

Claim:
A cardiac rhythm management system comprising: a sensing circuit to sense at least one electrogram; a pacing circuit to deliver pacing pulses; a dual-use sensor to sense a signal indicative of activities and heart sounds; a sensor processing circuit programmed to produce an activity level signal and a heart sound signal from the sensed signal, the sensor processing circuit including an input to receive the sensed signal indicative of activities and heart sounds, a first output representative of the activity level signal, and a second output representative of the heart sound signal; and a controller coupled to the sensing circuit and the pacing circuit, the controller including: a rate responsive pacing algorithm execution module to receive the activity level signal and dynamically adjust at least a pacing interval based on at least the activity level signal; and a sensor processing circuit programming module coupled to the sensor processing circuit, the sensor processing circuit programming module programmed to program gains and cutoff frequencies for producing the activity level signal and the heart sound signal.