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Two-Electrode ECG for Ambulatory Monitoring with Minimal Hardware Complexity

This article introduces a two-electrode ground-free electrocardiogram (ECG) with minimal hardware complexity, which is ideal for wearable battery-powered devices. The main issue of ground-free measurements is the presence of noise. Therefore, noise suppression methods that can be employed for a two-...

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Detalles Bibliográficos
Autores principales: Babusiak, Branko, Borik, Stefan, Smondrk, Maros
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7219345/
https://www.ncbi.nlm.nih.gov/pubmed/32331326
http://dx.doi.org/10.3390/s20082386
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author Babusiak, Branko
Borik, Stefan
Smondrk, Maros
author_facet Babusiak, Branko
Borik, Stefan
Smondrk, Maros
author_sort Babusiak, Branko
collection PubMed
description This article introduces a two-electrode ground-free electrocardiogram (ECG) with minimal hardware complexity, which is ideal for wearable battery-powered devices. The main issue of ground-free measurements is the presence of noise. Therefore, noise suppression methods that can be employed for a two-electrode ECG acquisition system are discussed in detail. Experimental measurements of a living subject and patient simulator are used to investigate and compare the performance of the three proposed methods utilizing the ADS1191 analogue front-end for biopotential measurements. The resulting signals recorded for the simulator indicate that all three methods should be suitable for suppressing power-line noise. The Power Spectral Density (PSD) of the signals measured for a subject exhibits differences across methods; the signal power at 50 Hz is −28, −24.8, and −26 dB for the first, second, and third method, respectively. The digital postprocessing of measured signals acquired a high-quality ECG signal comparable to that of three-electrode sensing. The current consumption measurements demonstrate that all proposed two-electrode ECG solutions are appropriate as a battery-powered device (current consumption < 1.5 mA; sampling rate of 500 SPS). The first method, according to the results, is considered the most effective method in the suppression of power-line noise, current consumption, and hardware complexity.
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spelling pubmed-72193452020-05-22 Two-Electrode ECG for Ambulatory Monitoring with Minimal Hardware Complexity Babusiak, Branko Borik, Stefan Smondrk, Maros Sensors (Basel) Article This article introduces a two-electrode ground-free electrocardiogram (ECG) with minimal hardware complexity, which is ideal for wearable battery-powered devices. The main issue of ground-free measurements is the presence of noise. Therefore, noise suppression methods that can be employed for a two-electrode ECG acquisition system are discussed in detail. Experimental measurements of a living subject and patient simulator are used to investigate and compare the performance of the three proposed methods utilizing the ADS1191 analogue front-end for biopotential measurements. The resulting signals recorded for the simulator indicate that all three methods should be suitable for suppressing power-line noise. The Power Spectral Density (PSD) of the signals measured for a subject exhibits differences across methods; the signal power at 50 Hz is −28, −24.8, and −26 dB for the first, second, and third method, respectively. The digital postprocessing of measured signals acquired a high-quality ECG signal comparable to that of three-electrode sensing. The current consumption measurements demonstrate that all proposed two-electrode ECG solutions are appropriate as a battery-powered device (current consumption < 1.5 mA; sampling rate of 500 SPS). The first method, according to the results, is considered the most effective method in the suppression of power-line noise, current consumption, and hardware complexity. MDPI 2020-04-22 /pmc/articles/PMC7219345/ /pubmed/32331326 http://dx.doi.org/10.3390/s20082386 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Babusiak, Branko
Borik, Stefan
Smondrk, Maros
Two-Electrode ECG for Ambulatory Monitoring with Minimal Hardware Complexity
title Two-Electrode ECG for Ambulatory Monitoring with Minimal Hardware Complexity
title_full Two-Electrode ECG for Ambulatory Monitoring with Minimal Hardware Complexity
title_fullStr Two-Electrode ECG for Ambulatory Monitoring with Minimal Hardware Complexity
title_full_unstemmed Two-Electrode ECG for Ambulatory Monitoring with Minimal Hardware Complexity
title_short Two-Electrode ECG for Ambulatory Monitoring with Minimal Hardware Complexity
title_sort two-electrode ecg for ambulatory monitoring with minimal hardware complexity
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7219345/
https://www.ncbi.nlm.nih.gov/pubmed/32331326
http://dx.doi.org/10.3390/s20082386
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