Wrist ballistocardiography and invasively recorded blood pressure in healthy volunteers during reclining bike exercise

Frontiers in Physiology

Physiology

Torjus L. Steffensen¹  Emma Ingeström¹  Hans M. Flade²  Idar Kirkeby-Garstad²  Filip E. Schjerven³  Martin Steinert⁴  Fredrik S. Solberg⁵ 

[1] Department of Circulation and Medical Imaging, Norwegian University of Science and Technology, Trondheim, Norway;Department of Circulation and Medical Imaging, Norwegian University of Science and Technology, Trondheim, Norway;St. Olav’s University Hospital, Trondheim, Norway;Department of Computer Science, Norwegian University of Science and Technology, Trondheim, Norway;Department of Mechanical Engineering, Norwegian University of Science and Technology, Trondheim, Norway;Department of Mechanical Engineering, Stanford University, Palo Alto, CA, United States;

关键词: cardiovascular monitoring;    exercise physiology;    cardiovascular physiology;    ballistocardiography;    postural effects;    wearable sensors;    blood pressure;    noninvasive monitoring;   

DOI  :  10.3389/fphys.2023.1189732

 received in 2023-03-19, accepted in 2023-05-04,  发布年份 2023

来源: Frontiers

【 摘 要 】

Objective: Ballistocardiogram (BCG) features are of interest in wearable cardiovascular monitoring of cardiac performance. We assess feasibility of wrist acceleration BCG during exercise for estimating pulse transit time (PTT), enabling broader cardiovascular response studies during acute exercise and improved monitoring in individuals at risk for cardiovascular disease (CVD). We also examine the relationship between PTT, blood pressure (BP), and stroke volume (SV) during exercise and posture interventions.Methods: 25 participants underwent a bike exercise protocol with four incremental workloads (0 W, 50 W, 100 W, and 150 W) in supine and semirecumbent postures. BCG, invasive radial artery BP, tonometry, photoplethysmography (PPG) and echocardiography were recorded. Ensemble averages of BCG signals determined aortic valve opening (AVO) timings, combined with peripheral pulse wave arrival times to calculate PTT. We tested for significance using Wilcoxon signed-rank test.Results: BCG was successfully recorded at the wrist during exercise. PTT exhibited a moderate negative correlation with systolic BP (ρSup = −0.65, ρSR = −0.57, ρAll = −0.54). PTT differences between supine and semirecumbent conditions were significant at 0 W and 50 W (p < 0.001), less at 100 W (p = 0.0135) and 150 W (p = 0.031). SBP and DBP were lower in semirecumbent posture (p < 0.01), while HR was slightly higher. Echocardiography confirmed association of BCG features with AVO and indicated a positive relationship between BCG amplitude and SV (ρ = 0.74).Significance: Wrist BCG may allow convenient PTT and possibly SV tracking during exercise, enabling studies of cardiovascular response to acute exercise and convenient monitoring of cardiovascular performance.

【 授权许可】

Unknown   
Copyright © 2023 Steffensen, Schjerven, Flade, Kirkeby-Garstad, Ingeström, Solberg and Steinert.