Research Paper 心拍変動分析手法の総合的評価・統合に関する研究

八名, 和夫

pp.1 - 6 , 2015-06-11
研究成果の概要(和文):心拍数は自律神経により制御され変化している。心拍数の考え方を精密化し各時刻における心拍数を定義し瞬時心拍数と呼ぶ。瞬時心拍数の周波数分布を調べることにより交感神経と副交感神経の働きの程度とバランスを知ることができる。様々瞬時周波数の推定方法が提案されているが推定精度の評価法が確立しておらず、どの方法が最適であるか定説に至っていない。本研究では新たな評価指標を導入し瞬時心拍数推定手法の比較を行った 研究成果の概要(英文):Heart rate is fluctuating due to the autonomic nervous activity. Spectral analysis of the heart rate variability has been known to be effective for noninvasive evaluation of the autonomic nervous activity. There are several methods to reconstruct the instantaneous heart rate signals from RR intervals, but researchers are selecting the method heuristically. This research intend to introduce indices to evaluate the accuracy of instantaneous heart rate reconstruction method. A new index named effective bandwidth has been shown to be effective for the evaluation. DCSI has been identified as the best heart rate reconstruction method but accompany the estimation bias at the high frequency region. The research found a blending method of DCSI and SIHR yielded a better estimation accuracy without any bias in estimated spectral pattern. The proposed method will be useful not only to evaluate the accuracy of the heart rate reconstruction accuracy but also useful to create new algorithm

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