Patent ID: 7792574

Claim:
An active implantable medical device having a diagnostic function, comprising: means for measuring a predominantly physiologic corporal parameter of a patient and providing a physiologic signal representative of said patient's metabolic need; means for measuring a predominantly physical corporal parameter of said patient and providing a physical signal representative of said patient's activity level; means for discriminating between phases of exercise and rest, operative in response to said physiologic and physical signals, and generating an activity index; means for evaluating a clinical status of the patient and generating a clinical status index through applying a first set of criteria (S 1 , S 2 ) to the physiologic and physical signals and the activity index; means for measuring a hemodynamic parameter of said patient and providing a hemodynamic signal representative of the patient's cardiac contractility; means for evaluating said patient's cardiac contractility, and generating a cardiac contractility index through applying a second set of criteria (S′ 1 ,S′ 2 ) to the hemodynamic signal; and means for cross analysis, receiving as an input said clinical status index, said cardiac contractility index, and generating as an output a preventive alert signal that is function of the respective values of the clinical status index and the cardiac contractility index.