Skip to main content
. 2021 Feb 16;16(2):e0246789. doi: 10.1371/journal.pone.0246789

Fig 1. Heart rate variability recordings.

Fig 1

Differences in heart rate variability indices (A vs. D), tachograms (B vs. E) and power spectral densities showing distributions of high frequency and low frequency power (C vs. F). Compared to the centrally non-obese Patient 1 (A, B, and C) with mild hypothalamic involvement, heart rate variability indices were visibly reduced in the centrally obese Patient 2 (D, E, and F) with extensive hypothalamic involvement. Note the different scales at the y-axes of the power spectral densities. Abbreviations: BPM, beats per minute; SDNN, standard deviation of all normal R-R intervals; RMSSD, root mean square of the difference of successive R-R intervals; TP, total power; LF, low frequency; HF, high frequency; ms, milliseconds; PSD, power spectral density; VLF, very low frequency.