Patent ID: 8565875

Claim:
A cardiac rhythm management system, including: a first sensing circuit to sense a first cardiac signal, the first sensing circuit including: a first sense amplifier to receive the first cardiac signal; and a first cardiac depolarization detector, coupled to the first sense amplifier, to detect ventricular depolarizations in the first cardiac signal; and a controller coupled to the first sensing circuit, the controller including: a rate detector, coupled to the first cardiac depolarization detector, to determine a ventricular rate from the detected ventricular depolarizations; a comparator, coupled to the rate detector, including inputs representative of the ventricular rate and at least one of a first predetermined value, a second predetermined value, and a predetermined threshold and one or more outputs representative of whether the ventricular rate exceeds the second predetermined value and whether the ventricular rate falls below the predetermined threshold; a storage medium, coupled to the comparator, including the first predetermined value, the second predetermined value, and the predetermined threshold; and a pacing algorithm module, coupled to the comparator, to set a maximum ventricular pacing rate to the first predetermined value when the ventricular rate exceeds the second predetermined value, and set the maximum ventricular pacing rate to the second predetermined value when the ventricular rate falls below the predetermined threshold.