Cart (Loading....) | Create Account
Close category search window
 

Effects of record length selection on the accuracy of spectral estimates of heart rate variability: a simulation study

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Pinna, G.D. ; Dept. of Biomed. Eng., IRCCS Med. Centre of Rehabilitation, Montescano, Italy ; Maestri, R. ; Sanarico, M.

To evaluate the effects of record length selection on the accuracy of spectral estimates of heart rate variability (HRV), a simulation study was carried out using a set of 58 signals obtained by autoregressive (AR) fitting a representative sample of real HRV signals. Four record lengths of 180, 300, 420, and 540 s were considered. Spectral estimation was performed by both the Blackman-Tukey (B-T) and AR methods. Accuracy was assessed for: (1) point spectral estimates, by computing the normalized averaged bias (NAB) and variance (NAV); and (2) the most commonly used spectral parameters [total power (TP) and the powers in the bands: very low frequency (VLF) (0÷0.04 Hz), low frequency (LF) (0.04÷0.15 Hz), and high frequency (HF) (0.15÷0.45 Hz)], by computing the normalized bias (NB) and variance (NV). The results are: whatever the record length considered, the 90th percentiles (90P) of the NAB were <10%, whereas those of the NB were <9% for TP, LF, and HF powers, and <14% for the VLF power, in both methods. The NAV was proportional to the reciprocal of record length, showing high 90P values for the shortest record length (26.4% for B-T and 44.2% for AR). The NV showed the same trend but 90P values were much lower (<8% for TP, LF, and HF powers and <19% for VLF power, in both methods). In the final part of the paper a procedure for the computation of approximate upper bounds of the relative absolute error of spectral measures at each record length, based on the knowledge of the NE and NV, is presented.

Published in:

Biomedical Engineering, IEEE Transactions on  (Volume:43 ,  Issue: 7 )

Date of Publication:

July 1996

Need Help?


IEEE Advancing Technology for Humanity About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies

A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2014 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.