| 1. |
- Benouar, Sara, et al.
(author)
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Systematic variability in ICG recordings results in ICG complex subtypes : steps towards the enhancement of ICG characterization
- 2018
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In: Journal of Electrical Bioimpedance. - : Walter de Gruyter. - 1891-5469. ; 9:1, s. 72-82
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Journal article (peer-reviewed)abstract
- The quality of an impedance cardiography (ICG) signal critically impacts the calculation of hemodynamic parameters. These calculations depend solely on the identification of ICG characteristic points on the ABEXYOZ complex. Unfortunately, contrary to the relatively constant morphology of the PQRST complex in electrocardiography, the waveform morphology of ICG data is far from stationary, which causes difficulties in the accuracy of the automated detection of characteristic ICG points. This study evaluated ICG recordings obtained from 10 volunteers. The results indicate that there are several different waveforms for the ABEXYOZ complex; there are up to five clearly distinct waveforms for the ABEXYOZ complex in addition to those that are typically reported. The differences between waveform types increased the difficulty of detecting ICG points. To accurately detect all ICG points, the ABEXYOZ complex should be analyzed according to the corresponding waveform type.
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| 2. |
- Benouar, Sara, et al.
(author)
-
Where to be from the typical ICG waveform
- 2018
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In: Proceedings of IC2EM-2018. - 9789931954804 ; , s. 227-232
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Conference paper (peer-reviewed)abstract
- The ICG characteristic points are crucialfor the calculation of hemodynamic parameters. However, in opposite of the relatively constant morphology of the PQRST waves in electrocardiography. The waveform morphology of the ABEXYOZ complex of the ICG is far from stationary, which yields to difficulties in the automated detection of characteristic ICG points. This study evaluates ICG recordings obtained from 4volunteers. The results indicate that there are atypical ABEXYOZ complex in addition to the known typical complex. These atypical waveforms increase the difficulty of ICG signal analysis. To accurately and automatically detect the characteristic ICGpoints, and as a perspective of a future work, the targeted waveform must be known. In apurpose of classifying the atypical waveform into several types of the ABEXYOZ complex. This waveform types should be identified before the analysis of the dZ/dt ICG signal.
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| 3. |
- Hafid, Abdelakram, et al.
(author)
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Full Impedance Cardiography Measurement Device Using Raspberry PI3 and System-on-Chip Biomedical Instrumentation Solutions
- 2018
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In: IEEE journal of biomedical and health informatics. - : IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC. - 2168-2194 .- 2168-2208. ; 22:6, s. 1883-1894
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Journal article (peer-reviewed)abstract
- Impedance cardiography (ICG) is a noninvasive method for monitoring cardiac dynamics using electrical bioimpedance (EBI) measurements. Since its appearance more than 40 years ago, ICG has been used for assessing hemodynamic parameters. This paper presents a measurement system based on two System on Chip (SoC) solutions and Raspberry PI, implementing both a full three-lead ECG recorder and an impedance cardiographer, for educational and research development purposes. Raspberry PI is a platform supporting Do-I t-Yourself project and education applications across the world. The development is part of Biosignal PI, an open hardware platform focusing in quick prototyping of physiological measurement instrumentation. The SoC used for sensing cardiac biopotential is the ADAS1000, and for the EBI measurement is the AD5933. The recordings were wirelessly transmitted through Bluetooth to a PC, where the waveforms were displayed, and hemodynamic parameters such as heart rate, stroke volume, ejection time and cardiac output were extracted from the ICG and ECG recordings. These results show how Raspberry PI can be used for quick prototyping using relatively widely available and affordable components, for supporting developers in research and engineering education. The design and development documents will be available on www.BiosignalPl.com, for open access under a Non Commercial-Share A like 4.0 International License.
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| 4. |
- Hafid, Abdelakram, et al.
(author)
-
Full impedance cardiography measurement device using raspberry PI3 and system-on-chip biomedical instrumentation solutions
- 2018
-
In: IEEE journal of biomedical and health informatics. - : IEEE. - 2168-2194 .- 2168-2208. ; 22:6, s. 1883-1894
-
Journal article (peer-reviewed)abstract
- Impedance cardiography (ICG) is a noninvasive method for monitoring cardiac dynamics using electrical bioimpedance (EBI) measurements. Since its appearance more than 40 years ago, ICG has been used for assessing hemodynamic parameters. This paper presents a measurement system based on two System on Chip (SoC) solutions and Raspberry PI, implementing both a full three-lead ECG recorder and an impedance cardiographer, for educational and research development purposes. Raspberry PI is a platform supporting Do-It-Yourself project and education applications across the world. The development is part of Biosignal PI, an open hardware platform focusing in quick prototyping of physiological measurement instrumentation. The SoC used for sensing cardiac biopotential is the ADAS1000, and for the EBI measurement is the AD5933. The recordings were wirelessly transmitted through Bluetooth to a PC, where the waveforms were displayed, and hemodynamic parameters such as heart rate, stroke volume, ejection time and cardiac output were extracted from the ICG and ECG recordings. These results show how Raspberry PI can be used for quick prototyping using relatively widely available and affordable components, for supporting developers in research and engineering education. The design and development documents will be available on www.BiosignalPI.com, for open access under a Non Commercial-Share A like 4.0 International License.
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| 5. |
- Hafid, Abdelakram, et al.
(author)
-
Simultaneous Recording of ICG and ECG Using Z-RPI Device with Minimum Number of Electrodes
- 2018
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In: Journal of Sensors. - : Hindawi Publishing Corporation. - 1687-725X .- 1687-7268. ; 2018
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Journal article (peer-reviewed)abstract
- Impedance cardiography (ICG) is a noninvasive method for monitoring mechanical function of the heart with the use of electrical bioimpedance measurements. This paper presents the feasibility of recording an ICG signal simultaneously with electrocardiogram signal (ECG) using the same electrodes for both measurements, for a total of five electrodes rather than eight electrodes. The device used is the Z-RPI. The results present good performance and show waveforms presenting high similarity with the different signals reported using different electrodes for acquisition; the heart rate values were calculated and they present accurate evaluation between the ECG and ICG heart rates. The hemodynamics and cardiac parameter results present similitude with the physiological parameters for healthy people reported in the literature. The possibility of reducing number of electrodes used for ICG measurement is an encouraging step to enabling wearable and personal health monitoring solutions.
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