I am an encephalographer (meaning I read EEG), and it is easy to understand frequency analyses of EEG because visual inspection of an EEG gives an impression of how much alpha, beta, theta, and delta frequencies are in the recording. In comparison, I do not find frequency analyses of heart rate variability to be intuitive. When the HRV output describes high frequency and low frequency parameters, do these correspond to anything I can see by inspecting the raw ECG signal? Does HRV frequency analysis (high or low frequency) correspond to anything specific about P-waves, QRS complexes, or T-waves on the ECG??
Thank you
Hi,
Here are a few references:
Rogers B, Schaffarczyk M, Clauß M, Mourot L, Gronwald T. The Movesense Medical Sensor Chest Belt Device as Single Channel ECG for RR Interval Detection and HRV Analysis during Resting State and Incremental Exercise: A Cross-Sectional Validation Study. Sensors (Basel). 2022 Mar 5;22(5):2032. doi: 10.3390/s22052032
Siecinski S, Tkacz EJ, Kostka PS. Comparison of HRV indices obtained from ECG and SCG signals from CEBS database. Biomed Eng Online. 2019 Jun 1;18(1):69. doi: 10.1186/s12938-019-0687-5
Udawat AS, Singh P. An automated detection of atrial fibrillation from single‑lead ECG using HRV features and machine learning. J Electrocardiol. 2022 Nov-Dec;75:70-81. doi: 10.1016/j.jelectrocard.2022.07.069
Fojt O, Holcik J. Applying nonlinear dynamics to ECG signal processing. Two approaches to describing ECG and HRV signals. IEEE Eng Med Biol Mag. 1998 Mar-Apr;17(2):96-101. doi: 10.1109/51.664037
I have asked similar questions as to ratios and/or harmonics between objective recordings of what meditators refer head, heart and hara, and not yet received a satisfactory solution. In my limited knowledge, precise ratios for these different ranges of oscillatory frequencies may need to be calculated for different person’s bandwidths for diagnostic and healing purposes. I have not yet seen any normative data. The attached provides a big picture view.
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