Patent ID: 7860560

Claim:
Method for online-displaying a HRV biofeedback signal to a patient with the following steps: providing 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 the patient over the period n·T s , determining a distribution function F h,i (f) for each sampling sequence f h,i (kT s ) as a function of frequency by means of a spectral analysis, 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, standardising the integral fractions I max,i and I ref,i using a standardising factor K ref where Ĩ max,i =K ref *I max,i and Ĩ ref,i =K ref *I ref,i in such a way that for the second integral fraction the condition Ĩ ref,i ≧1 is satisfied, determining a parameter HRV i for each sampling sequence f h,i (kT s ) with the respective integral fractions Ĩ max,i and Ĩ ref,i with a function f(Ĩ ref ) according to HRV i = I ~ max , i * f ⁡ ( I ~ ref , i ) , wherein the function f(Ĩ ref ) for each integral fraction Ĩ ref,i satisfies the conditions 1 > f ⁡ ( I ~ ref , i ) > 1 I ~ ref , i and 0 > ∂ f ⁡ ( I ~ ref ) ∂ I ~ ref ⁢ ⁢ | I ~ ref , i ⁢ > - f ⁡ ( I ~ ref , i ) I ~ ref , i and wherein the function f(Ĩ ref ), the first and second frequency ranges and the standardising factor K ref are the same for all m evaluated sampling sequences f h,i (kT s ), and using each parameter HRV i for the HRV biofeedback signal for online-displaying to the patient.