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. 2022 Feb 27;22(5):1873. doi: 10.3390/s22051873

Figure 4.

Figure 4

The characteristics of PPG morphology corresponds to the pulsatile PPG waveform including waveform parameter and time-related parameter. Waveform parameter: systolic area over total area, diastolic area over total area, systolic area over pulse amplitude, diastolic area over pulse amplitude, maximal amplitude over time as maximal slope. Time-related parameter: systolic time, diastolic time and mean peak to peak interval.