Heart rate variability LF/HF ratio: impact of paced respiration on PSD estimation techniques
نویسندگان
چکیده
Differences between spectral estimation techniques using fast Fourier transform (FFT), autoregressive modelling (AR) and Lomp-Scargle periodogram (LSP) with respect to the impact of metronomic breathing on sympathovagal balance were investigated by calculating heart rate variability frequency domain LF/HF ratio for 25 subjects under paced respiration. All techniques showed a significant increase in LF/HF ratio with rising breathing frequency. Differences in calculated LF/HF at higher breathing frequencies ratio between LSP and FFT as well as LSP and AR may be caused by lowpass effect of resampling used for FFT and AR.
منابع مشابه
Effect of changes in sympathovagal balance on the accuracy of heart rate variability obtained from photoplethysmography.
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