METHOD OF HUMAN HEART RATE VARIABILITY EXAMINATION Russian patent published in 2008 - IPC A61B5/452 

FIELD: medicine.

SUBSTANCE: R-R intervals are registered. Spectral analysis of intervals is performed by continuous wavelet transform. Frequency intensity of cardio-intervals a are determined at the moment b by formula: , a > 0, where W(a,b) is wavelet transform rate; f(t) is analysed function; Ψ(((t-b)/a) is analysing wavelet. Scale-grams are drew on basis of wavelet rates on segment [b_i,b_j] under formula: , i,j<N, j>i, where V(a_l) is signal scale-gram; N is rate number; a_l is wavelet transform scale. Physiologically significant frequency ranges are marked out on scale-grams, on the basis of distances between adjacent local minimums on scale-gram curve. Values of wavelet power density U and values of specific wavelet power density are determined for each frequency range.

EFFECT: increased accuracy if variability detection owing to due regard for individual reactions of examined patient.

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