US Patent 7917194 Method and apparatus for detecting pulmonary edema

Conditions resulting from acute decompensation such as pulmonary edema may be indicated based on analysis of respiration signals. In some embodiments a respiration signal is derived from an intracardiac electrogram (“IEGM”) signal. In some embodiments one or more non-rate-based parameters are derived from a detected respiration signal to identify a pulmonary edema condition. In some embodiments a warning may be generated or therapy administered to a patient in response to an indication of pulmonary edema.