Method and apparatus for detecting and treating heart failure

An apparatus comprising a controller for evaluating a heart failure condition of a patient during respiratory pressure treatment, the apparatus comprising:

• a plurality of sensors comprising a sensor configured measure treatment pressure delivered by a respiratory treatment device, the plurality of sensors further comprising a photoplethysmogram sensor;
• and
• a processor coupled with the plurality of sensors, the processor configured to:
• control a determination of a heart failure condition change indicator based on i) an event comprising detection of a first trend and ii) an index of arterial stiffness determined with the photoplethysmogram sensor, wherein the first trend comprises a trend of increases in treatment pressure and, wherein the trend of increases is a period of two or more days, the indicator representing information about a change in a heart failure condition of the patient,
• generate a decompensation warning in response to the determination of the heart failure condition change indicator, wherein the decompensation warning is generated based on prior decompensation warnings, and
• control a change to the respiratory pressure treatment delivered by the respiratory treatment device in response to the heart failure condition change indicator.