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Information- Original Article
- J Korean Acad Rehabil Med. 1997;21(5):928-935.
- Assessment of Autonomic Nervous Function in Young Adults by Power Spectral Analysis of Heart Rate Variability.
- Chon, Joong Son , Chun, Sae Il , Cho, Kyung Ja , Jin, Mi Ryeong , Kim, Tae Sun , Kim, Deog Young , Ahn, Juhn , Jeong, Kee Sam , Shin, Kun Soo , Lee, Myoung Ho
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1Department of Rehabilitation Medicine, Yonsei University College of Medicine, Korea.
2Institute of Traditional Medicine, Yonsei University College of Medicine, Korea.
3Department of Electrical Engineering, Yonsei University College of Engineering, Korea.
4Institute of Medical Instruments Technology, Yonsei University, Korea.
- Abstract
The powers of the low-frequency(LF) and high-frequency(HF) components characterizing heart rate variability (HRV) appear to reflect, in their reciprocal relationship, changes in the state of the sympatho-vagal balance occurring during orthostatic stress with head-up tilt.
We studied 24 healthy volunteers (median age, 23.1 years) who were subjected after a rest period to a series of passive head-up tilt steps chosen from the following angles: 00. 150, 300, 450, 700, and 900 under the condition of frequency controlled respiration(0.25Hz) in order to get data of the Korean young adults.
During head-up tilt, heart rate and normalized low frequency power(LFN : 0.05∼0.15 Hz) of HRV showed significant increase(p=0.000), but normalized high frequency power(HFN : 0.2∼0.3 Hz) and total power showed progressive decrease(p=0.000, p＜0.01 respectively). Male showed significantly higher LFN and lower HFN than female at tilt table angle 00(p＜0.01).
Power spectral analysis of HRV appears to be capable of providing a noninvasive quantitatibve evaluation of graded changes in the state of the sympatho-vagal balance.
Keywords :Head-up tilt, Heart rate variability(PSA), Sympatho-vagal balance, Head-up tilt, Power spectral analysis(PSA)