| Project/Area Number |
26560277
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Rehabilitation science/Welfare engineering
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| Research Institution | Yamagata Prefectural University of Health Science |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Keywords | 心弾動図 / 心拍変動 / 静止立位 / 非線形解析 / 高齢者 / 加算平均法 / Power law |
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| Outline of Final Research Achievements |
Heart rate variability was compared using ballistocardiography (BCG) and electrocardiography (ECG). Heart rate R-R intervals were measured in 12 healthy young and elderly individuals during 1 min of quiet standing, and J-J intervals of BCG were extracted from the vertical ground reaction force. The autonomic nervous system ratio of low-frequency to high-frequency components (LF/HF), detrended fluctuation analysis (time domain), and fast Fourier transform (FFT) power law (frequency domain) were evaluated. Correlation coefficients between LF/HF calculated using ECG and BCG were weak. In addition, two power laws confirmed that correlations between ECG and BCG indicators were higher than those between LF/HF, suggesting non-linear analysis of BCG data. FFT power laws were approximately -1 for both ECG and BCG, which provides support for a more detailed study of frequency domain power laws for BCG.
Our findings indicate that cardiac function while standing is weak evaluated by BCG.
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