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  • Title: [Spectral analysis of R-R intervals in adolesent persons during mental stress].
    Author: Zheng D, Shen L, Wu G, Jiang Y, Zhou Y, Wang W.
    Journal: Sheng Wu Yi Xue Gong Cheng Xue Za Zhi; 1997 Mar; 14(1):38-41. PubMed ID: 9817663.
    Abstract:
    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.
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