[Spectral analysis of R-R intervals in adolesent persons during mental stress].
In this study, power spectrum analysis of the autoregressive model was used to quantitatively estimate the power spectrum of R-R intervals in adolesent during the state of the mental stress. The power spectrum density of the lower frequency (HF: 0.05-0.15 Hz) and the high frequency (HF: 0.15-0.5 Hz) component were acquired. The results showed that during the mental stress the HF component decreased significantly (P < 0.001) while the LF component increased relatively and the center frequency of the HF increased remarkably (P < 0.001). This suggests that the spectral analysis of heart rate variability (R-R interval) offers an efficient non-invasive method to assess the autonomic nerve activity of cardiovascular system during the stress condition.
Zheng
D
D
Department of Biomedical Engineering, Shanghai Medical University.
Shen
L
L
Wu
G
G
Jiang
Y
Y
Zhou
Y
Y
Wang
W
W
D000328:Adult; D004562:Electrocardiography / Q000379:methods; D005260:Female; D006339:Heart Rate; D006801:Humans; D008297:Male; D012815:Signal Processing, Computer-Assisted; D013315:Stress, Psychological / Q000503:physiopathology*