Identification of steady states and quantification of transition periods from beat-by-beat cardiovascular time series: Application to incremental exercise test

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

Abstract

A recently proposed procedure for checking the cardiovascular steady state from beat-by-beat values of blood pressure and heart rate was used for investigating incremental exercise tests. We measured continuous blood pressure in 5 volunteers during rest, incremental exercise until volitional exhaustion, and recovery, and derived a "steadiness profile" over the whole recording. During exercise, the level of steadiness was higher in the best trained subjects. Steady state was lost at the maximum workload, WL max, in all the subjects. Recovery time, measured as the period to reach a new steady state after exercise, seems to be inversely related to WLmax, ranging from 254s for the best trained subject (WL max = 275W) to 350s for the less trained one (WLmax = 175W). The analysis showed that the procedure can check the hypothesis of steady state during exercise tests, and provide useful information to better describe the level of physical fitness.

Original languageEnglish
Title of host publicationComputers in Cardiology
EditorsA. Murray
Pages269-272
Number of pages4
Volume31
Publication statusPublished - 2004
EventComputers in Cardiology 2004 - Chicago, IL, United States
Duration: Sep 19 2004Sep 22 2004

Other

OtherComputers in Cardiology 2004
CountryUnited States
CityChicago, IL
Period9/19/049/22/04

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Software

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