Using multiple diagnostic parameters for predicting heart failure events

A method comprising:

• monitoring, by processing circuitry, at least one primary diagnostic parameter and at least one secondary diagnostic parameter of a patient based on at least one signal from at least one sensor;
• determining, by the processing circuitry, a plurality of values of an index over time based on the primary diagnostic parameter, wherein the index values are indicative of a degree of heart failure of the patient;
• comparing, by the processing circuitry, each of the determined values of the index to an upper threshold and a lower threshold, wherein the upper threshold and the lower threshold define a threshold zone;
• in response to a first determined value of the index being outside of the threshold zone, determining, by the processing circuitry, whether to provide an alert to a user indicating worsening heart failure in the patient based on the determined value of the index and not based on the at least one secondary diagnostic parameter;
• and
• in response to a second determined value of the index being within the threshold zone, determining, by the processing circuitry, whether to provide the alert to the user indicating worsening heart failure based on the at least one secondary diagnostic parameter.

A non-transitory computer readable storage medium comprising instructions that, when executed by processing circuitry, cause the processing circuitry to:

• monitor at least one primary diagnostic parameter and at least one secondary diagnostic parameter of a patient based on at least one signal from at least one sensor;
• determine a plurality of values of an index over time based on the primary diagnostic parameter, wherein the index values are indicative of a degree of heart failure of the patient;
• compare each of the determined values of the index to an upper threshold and a lower threshold, wherein the upper threshold and the lower threshold define a threshold zone;
• in response to a first determined value of the index being outside of the threshold zone, determine whether to provide an alert to a user indicating worsening heart failure in the patient based on the determined value of the index and not based on the at least one secondary diagnostic parameter;
• and
• in response to a second determined value of the index being within the threshold zone, determine whether to provide the alert to the user indicating worsening heart failure based on the at least one secondary diagnostic parameter.