Testing the presence of non stationarities in short heart rate variability series

A. Porta, G. D'Addio, S. Guzzetti, D. Lucini, M. Pagani

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The study proposes a test to evaluate stationarity over short beat-to-beat variability series of heart period (about 300 samples). This test checks the steadiness of mean and variance (i.e. a restricted form of weak stationarity). Artificial series, in which changes of the mean and variance are simulated, are utilized to set the analysis parameters and to evaluate the performance of the method. Next, the test is applied to beat-to-beat series variability series of heart period derived from humans at rest, during controlled respiration at different breathing rates (10, 15 and 20 breaths/minute) and during 80° head-up tilt. The application proves the difficulty to find stationary periods in short term recordings of heart period variability and prompts for an assessment of the effect of non stationarities on traditional linear and non linear indexes assuming stationarity as a requirement.

Original languageEnglish
Title of host publicationComputers in Cardiology
EditorsA. Murray
Number of pages4
Publication statusPublished - 2004
EventComputers in Cardiology 2004 - Chicago, IL, United States
Duration: Sep 19 2004Sep 22 2004


OtherComputers in Cardiology 2004
Country/TerritoryUnited States
CityChicago, IL

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Software


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