Non stationary analysis of heart rate variability during the obstructive sleep apnea Conference Paper uri icon


  • Characteristic fluctuations of the heart rate are found during obstructive sleep apnea (OSA), bradycardia in apneonic phase and tachycardia at the recovery of ventilation. In order to assess its autonomic response, in this study, the time-frequency distribution of Born-Jordan and Evolutive Poincaré plots are used. From Physionet was taken a database with records of ECG and Respiratory signals. During the OSA all spectral indexes presented oscillations correspondent to the changes between brady and tachycardia of the RR intervals as well as greater values than during control epochs. Born-Jordan distribution and Evolutive Poincaré plots could help to characterize and develop an index for the evaluation of OSA. Very low frequency could also be a good index of OSA.

publication date

  • 2004-01-01