Fig. 3 | npj Digital Medicine

Fig. 3

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. 3

Comparison of non-invasive and invasive waveforms. a Measurement setup with the invasive (I) catheter (left) and the non-invasive (NI) wristband (right) along with samples of high-quality and low-quality signals. Comparison of ensemble averaged pulse waveforms of I (blue) and NI (red) pulse waveforms. The waveforms with highest b and lowest c Pearson correlation coefficient between the I and NI measurements from the study group are shown. d–f show the correlation and Blandt–Altman plots of the time intervals at (i) maximum slope, (ii) Dicrotic notch, and (iii) diastolic peak, respectively, and g compares the normalized MAP values between I and NI measurements. The dashed lines in Bland–Altman plots present the 95% CI

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