Patent ID: 8738119

Claim:
An apparatus comprising: a plurality of sensors, wherein each sensor is configured to provide a separate sensor signal that includes physiological information, and wherein at least one sensor is implantable; a processor, communicatively coupled to the sensors, wherein the processor includes: a physiological change event detection module configured to detect a physiological change event from a sensor signal and to produce an indication of occurrence of one or more detected physiological change events; and a heart failure (HF) detection module configured to: determine a change in HF status of a subject by applying a first rule HF determination to a plurality of indications from separate sensor signals of whether respective physiological change events occurred, wherein the first rule HF determination includes determining that the detected physiological change events are indicative of the change in HF status when a number of detected physiological change events are a majority of a set of physiological change events that indicate the change in HF status; determine whether to override the first rule HF determination using a second rule HF determination; and declare whether the change in HF status occurred according to the first and second rules.