Computer implemented method for determining a heart failure status of a patient, training method and system

System for determining a heart failure status of a patient, comprising:

• an implantable medical device for acquiring a first data set comprising cardiac current curve data of a patient;
• means for applying a first machine learning algorithm and/or a rule-based algorithm to the cardiac current curve data for classification of a medical relevance of a parameter deviation from a norm of the cardiac current curve data;
• means for outputting a second data set comprising at least a first class representing a medically relevant parameter deviation or a second class representing a medically not relevant parameter deviation;
• in response to outputting the first class, triggering a patient information request;
• means for providing a third data set comprising the first data set and data provided in response to the patient information request;
• means for applying a second machine learning algorithm to the third data set for determining the heart failure status of the patient;
• and
• means for outputting a fourth data set indicative of the heart failure status of a patient.