Fig. 2 | Scientific Reports

Fig. 2

From: Music therapy with adult burn patients in the intensive care unit: short-term analysis of electrophysiological signals during music-assisted relaxation

Fig. 2

Time, Non-linear, and frequency analysis for ECG. (a) ECG example of artifact remotion and R peak detection. (b) Tachogram extraction example for patient 3 session 1. R-R time segments were computed in the time series, miss detections were excluded, and then interpolated. (c) Normalized Poincaré plot for PRE, MTI, and POST for all patients. Confidence ellipses were plotted with SD1 as perpendicular radius and SD2 as parallel radius to the identity lines, represented by dashed lines. (d) Power spectral density plots average across all patients for PRE, MTI, and POST. The three plots are logarithmic scale and share the same axes. (e) Boxplots to compare PRE, MTI, and POST. The plots are arranged from top to bottom as follows: LF, HF, and the LF/HF ratio. Black lines at the top indicate significant differences between periods (*p-value < 0.05, **p-value < 0.01).

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