Pacemaker: Narrow pulses generation for design and sensitivity test

Chew, Kah-Meng; Lau, Doris

doi:10.1109/memea.2017.7985840

Cited by 2 publications

(2 citation statements)

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“…MWCNT/ PDMS electrode represented a higher SNR ratio (20.14 dB) than commercial wet Ag/AgCl electrode (17.35 dB) at steady state. [114] Also, the MWCNT/PDMS electrode showed reliable performance even if it did not have any adhesive layer. The other approach for the carbon-based skin electrodes is the fabrication of laser-scribed graphene (LSG).…”

Section: Carbon Nanomaterial-based Electrodesmentioning

confidence: 97%

Recent Progress in the Development of Flexible Wearable Electrodes for Electrocardiogram Monitoring During Exercise

Kang,

Lee,

Kwon

et al. 2024

Advanced NanoBiomed Research

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Electrocardiogram (ECG) monitoring has recently been an important indicator of cardiac health diagnosis. In the past, ECG could be measured under limited conditions in hospitals with 12‐lead electrode systems. Recently, portable and wearable devices have offered continuous, real‐time monitoring of ECG signals in real life. However, developing wearable ECG sensors that provide low‐motion artifacts and high‐quality signals during exercise conditions is still challenging. Herein, this review reports a systematic summary of the key characteristics, properties, and requirements of flexible wearable ECG devices for the early diagnosis of heart dysfunction in dynamic motions, including exercise. In addition, the recent progress in controlling sensor adhesion and novel materials for designing dry electrodes are discussed to improve ECG signal quality in exercise. Finally, various aspects of electrode developmental challenges and limitations are reviewed, and research directions for future studies are discussed.

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Section: Carbon Nanomaterial-based Electrodesmentioning

confidence: 97%

Recent Progress in the Development of Flexible Wearable Electrodes for Electrocardiogram Monitoring During Exercise

Kang,

Lee,

Kwon

et al. 2024

Advanced NanoBiomed Research

View full text Add to dashboard Cite

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“…Additionally, the sensing of each CIED was tested by injecting a 40 ms sinesquared pulse or an ECG wave using a signal generator and an oscilloscope. 32 The pacing output and sensitivity during irradiation were monitored by programmers and an oscilloscope to analyze the dose-rate effect. An electrical load circuit was used to simulate myocardial resistance, and isolation circuitry between the load and oscilloscope was used, as recommended by the manufacturer's principal R&D engineer ( Fig.…”

Section: B2 | Interrogation Before During and After Radiationmentioning

confidence: 99%

The effect of stereotactic body radiotherapy (SBRT) using flattening filter‐free beams on cardiac implantable electronic devices (CIEDs) in clinical situations

Aslian

Kron

Watts

et al. 2020

J Applied Clin Med Phys

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Purpose: This study focused on determining risks from stereotactic radiotherapy using flattening filter-free (FFF) beams for patients with cardiac implantable electronic device (CIEDs). Two strategies were employed: a) a retrospective analysis of patients with CIEDs who underwent stereotactic radiosurgery (SRS)/SBRT at the Peter MacCallum Cancer Centre between 2014 and 2018 and b) an experimental study on the impact of FFF beams on CIEDs.Methods: A retrospective review was performed. Subsequently, a phantom study was performed using 30 fully functional explanted CIEDs from two different manufacturers. Irradiation was carried out in a slab phantom with 6-MV and 10-MV FFF beams. First, a repetition-rate test (RRT) with a range of beam pulse frequencies was conducted. Then, multifraction SBRT (48 Gy/4 Fx) and single-fraction SBRT (28 Gy/1 Fx) treatment plans were used for lung tumors delivered to the phantom.Results: Between 2014 and 2018, 13 cases were treated with an FFF beam (6 MV, 1400 MU/min or 10 MV, 2400 MU/min), and 15 cases were treated with a flattening filter (FF) beam (6 MV, 600 MU/min). All the devices were positioned outside the treatment field at a distance of more than 5 cm, except for one case, and no failures were reported due to SBRT/SRS. In the phantom rep-rate tests, inappropriate sensing occurred, starting at a rep-rate of 1200 MU/min. Cardiac implantable electronic device anomalies during and after delivering VMAT-SBRT with a 10-MV FFF beam were observed. Conclusions:The study showed that caution should be paid to managing CIED patients when they undergo SBRT using FFF beams, as it is recommended by AAPM TG-203. Correspondingly, it was found that for FFF beams although there is small risk from dose-rate effects, delivering high dose of radiation with beam energy greater than 6 MV and high-dose rate to CIEDs positioned in close vicinity of the PTV may present issues.---

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Pacemaker: Narrow pulses generation for design and sensitivity test

Cited by 2 publications

References 0 publications

Recent Progress in the Development of Flexible Wearable Electrodes for Electrocardiogram Monitoring During Exercise

Recent Progress in the Development of Flexible Wearable Electrodes for Electrocardiogram Monitoring During Exercise

The effect of stereotactic body radiotherapy (SBRT) using flattening filter‐free beams on cardiac implantable electronic devices (CIEDs) in clinical situations

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