Study of Electrode Locations for Joint Acquisition of Impedance- and Electro-cardiography Signals

Metshein, Margus; Gautier, Antoine; Frappé, Antoine; John, Deepu; Cardiff, Barry; Annus, Paul; Land, Raul; Märtens, Olev

doi:10.1109/embc46164.2021.9629504

Cited by 5 publications

(7 citation statements)

References 10 publications

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“…A rough estimation of the signal quality can be made empirically, based on visual impression, given in Table 1 (column: Quality ECG). In defining the quality categories, the proposed levels are based on the same approach as for ICG signals in [ 12 ]. However, as in the case of the analyzed ECG signals the R, S, and T waves are visually recognizable in almost 100% of cases, the level 0 (non-recognizable waveform) was omitted.…”

Section: Discussionmentioning

confidence: 99%

“…The locations of electrodes for ECG signal acquisition were selected based on the ICG electrode placements. More specifically, the ECG electrodes were attached alongside the electrodes of ICG [ 12 ]. The electrodes were physically separated for both techniques to avoid the additional electronic circuitry for signal pick-up that is necessary in the case of co-usage.…”

Section: Methodsmentioning

confidence: 99%

“…For evaluation, a single log for each EPC was selected fulfilling the criteria of being of relatively comparable quality. In [ 12 ], only the signals of ICG were analyzed; so, the current work relies on the previously unanalyzed data.…”

Section: Methodsmentioning

confidence: 99%

“…Moreover, a variety of sensors are often simultaneously used to measure cardiovascular system parameters besides ECG [ 11 ]—such as ICG, photoplethysmography (PPG), inertial measurement unit (IMU), etc. For picking up the signal of impedance for extracting the impedance cardiogram, a variety of electrode placement strategies (EPC) have been shown to give promising results [ 12 ]. The design of a wearable device, where the sensors co-employ the same locations, is expected to be more compact [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

“…The signals of ECG, acquired from a variety of non-standard locations (including single arm), are assessed to select the best ones. Comparison of the most suitable EPCs for ECG signal acquisition and the comparison to the EPCs for ICG signal acquisition (published by the authors in [ 12 ]) is performed. Suggestions for EPCs and the design of wearable devices (for both hardware and software) for the joint acquisition of the signals of ECG and ICG are given.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Non-Standard Electrode Placement Strategies for ECG Signal Acquisition

Metshein

Krivošei

Abdullayev

et al. 2022

Sensors

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Background: Wearable technologies for monitoring cardiovascular parameters, including electrocardiography (ECG) and impedance cardiography (ICG), propose a challenging research subject. The expectancy for wearable devices to be unobtrusive and miniaturized sets a goal to develop smarter devices and better methods for signal acquisition, processing, and decision-making. Methods: In this work, non-standard electrode placement configurations (EPC) on the thoracic area and single arm were experimented for ECG signal acquisition. The locations were selected for joint acquisition of ECG and ICG, targeted to suitability for integrating into wearable devices. The methodology for comparing the detected signals of ECG was developed, presented, and applied to determine the R, S, and T waves and RR interval. An algorithm was proposed to distinguish the R waves in the case of large T waves. Results: Results show the feasibility of using non-standard EPCs, manifesting in recognizable signal waveforms with reasonable quality for post-processing. A considerably lower median sensitivity of R wave was verified (27.3%) compared with T wave (49%) and S wave (44.9%) throughout the used data. The proposed algorithm for distinguishing R wave from large T wave shows satisfactory results. Conclusions: The most suitable non-standard locations for ECG monitoring in conjunction with ICG were determined and proposed.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Non-Standard Electrode Placement Strategies for ECG Signal Acquisition

Metshein

Krivošei

Abdullayev

et al. 2022

Sensors

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Impedance Cardiography Signal Processing with Savitzky-Golay and Frequency Sampling Kernels

Märtens

Metshein

Tamberg

et al. 2022

2022 18th Biennial Baltic Electronics Conference (BEC)

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Fiducial Point Estimation Solution for Impedance Cardiography Measurements

Märtens

Metshein

Abdullayev

et al. 2022

2022 IEEE International Instrumentation and Measurement Technology Conference (I2MTC)

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ICG (impedance cardiography) is in parallel to ECG (electrocardiography) an important indicator of the functioning of the heart and of the overall cardiovascular system. Adding the ICG to ECG measurement functionality into the wearable devices improves the quality of health monitoring, as the ICG reflects relevant hemodynamic parameters (informative time intervals, but also the stroke volume and cardiac output and their variability). The most challenging task of the ICG signal processing is to extract the key points B, C, X of the cardiac periodstart, peak-location, and value at this point and the end of the LVET (left ventricular ejection time) sub-period in the cardiac cycle. A novel block diagram and analog implementation of it has been proposed, analyzed, and discussed, with discussion of the benefits of the proposed solution. The proposed solution enables developing of relatively simple very power-efficient solutions, monitoring the ICG values of the person with smart and efficient data acquisition and processing.

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Study of Electrode Locations for Joint Acquisition of Impedance- and Electro-cardiography Signals

Cited by 5 publications

References 10 publications

Non-Standard Electrode Placement Strategies for ECG Signal Acquisition

Non-Standard Electrode Placement Strategies for ECG Signal Acquisition

Impedance Cardiography Signal Processing with Savitzky-Golay and Frequency Sampling Kernels

Fiducial Point Estimation Solution for Impedance Cardiography Measurements

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