An apparatus for An apparatus for determining a medical condition of a human subject, the apparatus comprising a control unit and a means for providing pulse wave data representative of a heart beat of the human subject. The control unit is configured to perform the steps of receiving the pulse wave data, selecting a portion of the pulse wave data indicative of a plurality of heart periods, determining a first index indicative of a heart rate variability based on the pulse wave data of the portion of the pulse wave data indicative of a plurality of heart periods, determining a second index indicative of a heart rate variability based on the pulse wave data of the portion of the pulse wave data indicative of a plurality of heart periods, the second index being different from the first index, and determining a medical condition of the subject based on the first and second indexes.
