SYSTEMS AND METHODS FOR DIAGNOSING HEART FAILURE BASED ON SLEEP APNEIC INDICATORS

摘要

This device includes a sensor of endocardiac acceleration EA and one or more circuits configured for: extracting from the EA signal a predetermined EA parameter, determining a period of sleep, evaluating the clinical condition of the patient based on the EA parameter variations on this sleep period, and issuing an alert of worsening of the patient's condition. The device further determines a variability index of the EA parameter on the sleep period, and then calculates a ratio between this calculated variability index and a reference value, and delivers this ratio as a clinical status index. The alert signal is generated by the crossing by this ratio of a predetermined alert threshold.

主权项

1. An active medical device, such as a stimulation, resynchronization and/or defibrillation implantable device, or a device for diagnostic purposes, including:
a sensor adapted to receive an endocardial acceleration (EA) signal; one or more circuits configured for:
performing signal analysis by extracting from the EA signal a predetermined EA parameter, and storing this EA parameter for successive cardiac cycles;determining a sleep period of the patient;evaluating the patient's hemodynamic status by providing an indication of the clinical status of the patient with the device according to the variations of said EA parameter on said sleep period of the patient, wherein evaluating the patient's hemodynamic status comprises:
calculating a variability index of said EA parameter on the sleep period, calculating a ratio between said calculated variability index and a value of reference variability index, and delivering said ratio as clinical condition index; anddiagnosing heart failure and delivering an alert signal of worsening of the patient condition in response to the crossing by said ratio of a predetermined alert threshold.