Data mining investigation of the association between a limb ballistocardiogram and blood pressure

Abstract

The results of this study may provide a viable basis for ultra-convenient BP monitoring based on a limb BCG alone.

Pulse Transit Time-Pulse Wave Analysis Fusion Based on Wearable Wrist Ballistocardiogram for Cuff-Less Blood Pressure Trend Tracking

“…We used the experimental data collected in our prior work 7,13 . In brief, we studied 23 young healthy volunteers (age 23+/-5 years; 17 males and 6 females; height 174+/-9cm; weight 74+/-16kg) under the approval and guidance of the University of Maryland Institutional Review Board (IRB).…”

“…These physiological signals were acquired at a sampling rate of 250Hz during 4 BPperturbing interventions (including cold pressor (CP), mental arithmetic (MA), slow breathing (SB), and breath holding (BH)) and 5 resting periods (R1, R2, R3, R4, and R5) in between them while the participants stood still. The BP range associated with each resting-intervention period as well as the overall BP range associated with the data acquired in the study can be found in our prior work 13 .…”

“…Fourth, we extracted the PPG feet using the intersecting tangent method 23,24 (Figure 1). Fifth, we performed PWA on the wrist BCG beats and extracted the fiducial points including the G, H, I, J, K, and L waves (Figure 1), as described in detail in our prior work 7,13 . Sixth, we extracted the reference DP and SP from the reference BP pulse beats as the minimum (DP) and maximum (SP) values in individual beats.…”

“…On an individual basis, we arranged the reference BP as well as BCG PTT and PWA features as follows similarly to our prior work 7,13 . First, we segmented the ranges of reference DP and SP across all resting periods and BP-perturbing interventions into 1mmHg bins.…”

“…Second, PWA approach exploits fiducial points in an arterial pulse wave to construct predictors of BP, often in conjunction with the state-of-the-art data mining and machine learning techniques. In the existing body of work, PPG [9][10][11] and BCG 12,13 as well as piezoelectric tonometry 14 have been explored due primary to the amenity to easy instrumentation based on the wearables (e.g., a wristband).…”