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. Author manuscript; available in PMC: 2023 Jan 1.
Published in final edited form as: IEEE Trans Biomed Eng. 2021 Dec 23;69(1):53–62. doi: 10.1109/TBME.2021.3087105

Fig. 3.

Fig. 3.

A total of 31 popular or promising PPG waveform features [15], [16] were considered as candidates for predicting the intervention-induced BP changes. Subject demographic information and pulse arrival time (PAT, the time delay between the R-wave of the ECG waveform and the leading foot of the PPG waveform) were also possible features.