Heart rate recovery after exercise: A study by Wavelet analysis

L. R. Davrath, Pinhas A. Beck, M. Scheinowitz, D. Elian, Solange Akselrod*

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations

Abstract

The reduction in heart rate (HR) during the first min of recovery immediately after a maximal exercise stress test (GXT) has recently been found to be a powerful and independent predictor of mortality. A modified Continuous Wavelet Transform (CWT) designed in our lab, is used to perform time-dependent spectral analysis during the nan steady-state conditions created by GXT. This method provides dynamic measures of the low frequency (LF) and high frequency (HF) peaks, associated with autonomic activity. A group of 18 patients underwent GXT using the Bruce Protocol Five of 18 patients demonstrated pathologic delta HR (≤18 bpm), while 13 patients displayed normal delta HR (>18 bpm). Patients with pathologic delta HR displayed significantly (p<0.05) lower HF fluctuations at one-min post exercise than did the controls. Attenuated delta HR upon recovery from GXT is indeed associated with abnormal vagal function, as assessed by CWT.

Original languageEnglish
Pages (from-to)453-456
Number of pages4
JournalComputers in Cardiology
Volume30
DOIs
StatePublished - 2003
EventComputers in Cardiology 2003 - Thessaloniki Chalkidiki, Greece
Duration: 21 Sep 200324 Sep 2003

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