PMC9096352_01
Comparison of mild vs. severe patients based on three variables: Total power, Mean RR, and PNN50.
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We can find something interesting in the results shown in Figure 7.
Signs of recovery. The left and right columns present time series shapelets that differentiate between unrecovered patients and recovered patients, respectively. The red shapelet (RR) is the original heartbeat interval. The yellow shapelet (DI) is the differencing transformation of the heartbeat interval. The blue shapelet (DM) is the deviation of the heartbeat interval from the mean value.
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Figure 8 presents the extracted patterns that best discriminate the sign of recovery (top two subplots) and sample patterns from the patients (bottom four subplots).