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Sensors 2015, 15(5), 11295-11311; doi:10.3390/s150511295

Heart Rate Variability Monitoring during Sleep Based on Capacitively Coupled Textile Electrodes on a Bed

Interdisciplinary Program for Bioengineering, Graduate School, Seoul National University, Seoul 110-799, Korea
Department of Biomedical Engineering, College of Medicine, Seoul National University, Seoul 110-799, Korea
Author to whom correspondence should be addressed.
Academic Editor: Panicos Kyriacou
Received: 17 March 2015 / Accepted: 8 May 2015 / Published: 14 May 2015
(This article belongs to the Collection Sensors for Globalized Healthy Living and Wellbeing)
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In this study, we developed and tested a capacitively coupled electrocardiogram (ECG) measurement system using conductive textiles on a bed, for long-term healthcare monitoring. The system, which was designed to measure ECG in a bed with no constraints of sleep position and posture, included a foam layer to increase the contact region with the curvature of the body and a cover to ensure durability and easy installation. Nine healthy subjects participated in the experiment during polysomnography (PSG), and the heart rate (HR) coverage and heart rate variability (HRV) parameters were analyzed to evaluate the system. The experimental results showed that the mean of R-peak coverage was 98.0% (95.5%–99.7%), and the normalized errors of HRV time and spectral measures between the Ag/AgCl system and our system ranged from 0.15% to 4.20%. The root mean square errors for inter-beat (RR) intervals and HR were 1.36 ms and 0.09 bpm, respectively. We also showed the potential of our developed system for rapid eye movement (REM) sleep and wake detection as well as for recording of abnormal states. View Full-Text
Keywords: capacitively coupled electrodes; conductive textiles; ECG; HRV monitoring capacitively coupled electrodes; conductive textiles; ECG; HRV monitoring

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Lee, H.J.; Hwang, S.H.; Yoon, H.N.; Lee, W.K.; Park, K.S. Heart Rate Variability Monitoring during Sleep Based on Capacitively Coupled Textile Electrodes on a Bed. Sensors 2015, 15, 11295-11311.

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