A new method for analysis of heart rate variability: counting statistics of 1/f fluctuations.
1/f fluctuations in heart rate are usually measured spectral analysis using Fast Fourier Transform. Here, we introduce a new method based on counting the number of QRS complexes in time intervals delta t of various length. For a 1/fb spectrum the variance of counts in delta t follows a power-law as delta t1+b. This method is applied to analyze long term fluctuations in heart rate variability in 10 healthy men. The results show periods of 1/f fluctuations with interpolated periods of white noise during night hours.
Meesmann
M
M
Medizinische Universitätsklinik Würzburg, Germany.
Grüneis
F
F
Flachenecker
P
P
Kniffki
K D
KD
D000328:Adult; D000704:Analysis of Variance; D001699:Biometry / Q000379:methods*; D003491:Cybernetics; D004562:Electrocardiography; D005583:Fourier Analysis; D006339:Heart Rate; D006801:Humans; D008297:Male; D013997:Time Factors