Method for evaluating heart rate variability

摘要

The invention relates to a method for evaluating a plurality of sampling sequences f_h,i(kT_s) where i=1,2,3, . . . ,m and k=0,1,2, . . . ,n, wherein each sampling sequence f_h,i(kT_s) represents the sampling sequence of the heart rate f_h of a patient over the period n.T_s. The following method steps are provided to supply a parameter of the HRV which by means of HRV biofeedback allows a patient to reliably stabilize his own RSA state: Determining a distribution function F_h,i(f) for each sampling sequence f_h,i(kT_s) as a function of the frequency, Determining a first integral fraction I_max,i of the distribution function F_h,i(f) for a first frequency range, wherein the first frequency range includes a maximum of the distribution function F_h,i(f), Determining a second integral fraction I_ref,i of the distribution function F_h,i(f) for a second frequency range which includes additional or different frequency ranges to the first frequency range, Standardizing the integral fractions I_max,i and I_ref,i using a standardizing factor K_ref where I_max,i=K_ref*I_max,i and I_ref,i=K_ref*I_ref,i in such a way that for the second integral fraction the condition I_ref,i>=1 is satisfied, Determining a parameter HRV_i for each sampling sequence f_h,i(kT_s) with the respective integral fractions I_max,i and I_ref,i with a function f(I_ref) according to ${\mathrm{HRV}}_i={\tilde{I}}_{\max ,i}*f\left({\tilde{I}}_{\mathrm{ref},i}\right),$ wherein the function f(I_ref) for each integral fraction I_ref,i satisfies the conditions $\begin{array}{cc}1>f\left({\tilde{I}}_{\mathrm{ref},i}\right)>\frac{1}{{\tilde{I}}_{\mathrm{ref},i}}\mathrm{and}0>\frac{\partial f\left({\tilde{I}}_{\mathrm{ref}}\right)}{\partial {\tilde{I}}_{\mathrm{ref}}}{|}_{{\tilde{I}}_{\mathrm{ref},i}}>-\frac{f\left({\tilde{I}}_{\mathrm{ref},i}\right)}{{\tilde{I}}_{\mathrm{ref},i}}& \end{array}$ and wherein the function f(I_ref), the first and second frequency ranges and the standardizing factor K_ref are the same for all m evaluated sampling sequences f_h,i(kT_s).