Fig. 5 | npj Digital Medicine

Fig. 5

From: Clinical assessment of a non-invasive wearable MEMS pressure sensor array for monitoring of arterial pulse waveform, heart rate and detection of atrial fibrillation

Fig. 5

Heartrate detection. a Pipeline of the heart rate detection algorithm (bandpass filter, artifact removal, convolution with triangular wavelet, multiscale-based peak detection, median beat interval, accepted HR interval). b Bland–Altman plot showing the agreement of heart rates obtained with the non-invasive wearable wristband (NI) and the invasive catheter (I). The dashed lines with corresponding values present the 95% CI. c Example of NI signal after band-pass filtering (top) and after convolution with triangle-shaped template (bottom). The red circles present the automatically detected peaks. d The found peaks referred back to the band-pass-filtered signal. Red circles and blue diamonds present the peaks from the NI and I (reference) signals, respectively

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