Selection of Parameters of Bandpass Filtering of the ECG Signal for Heart Rhythm Monitoring Systems

Федотов, А. А.

doi:10.1007/s10527-016-9600-8

Cited by 28 publications

(15 citation statements)

References 3 publications

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“…Electrocardiographic signals were recorded using CED 1902 and 1401 hardware and fed into Spike 2 software (Cambridge Electronic Design Ltd; Cambridge UK) applying a 10Hz high bandpass filter and 100 Hz low bandpass filter [ 38 ]. For the analysis, a threshold was applied to isolate R-wave peaks and to extract the number of heartbeats in a given time interval.…”

Section: Methodsmentioning

confidence: 99%

Absence of reliable physiological signature of illusory body ownership revealed by fine-grained autonomic measurement during the rubber hand illusion

2021

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The neural representation of a ‘biological self’ is linked theoretically to the control of bodily physiology. In an influential model, selfhood relates to internal agency and higher-order interoceptive representation, inferred from the predicted impact of efferent autonomic nervous activity on afferent viscerosensory feedback. Here we tested if an altered representation of physical self (illusory embodiment of an artificial hand) is accompanied by sustained shifts in autonomic activity. Participants (N = 37) underwent procedures for induction of the rubber hand illusion (synchronous stroking of own unseen hand and observed stroking of artificial hand) and a control condition (asychronous stroking). We recorded electrocardiography, electrodermal activity, and a non-invasive measure of multiunit skin sympathetic nerve activity (SKNA) from the chest. We compared these autonomic indices between task conditions, and between individuals who did and did not experience the illusion. Bayes factors quantified the strength of evidence for and against null hypotheses. Observed proprioceptive drift and subjective reports confirmed the efficacy of the synchronous (vs asynchronous) condition in inducing illusory hand ownership. Stringent discriminant analysis classified 24/37 individuals as experiencing the rubber hand illusion. Surprisingly, heart rate, heart rate variability, electrodermal activity, and SKNA measures revealed no autonomic differences between synchronous vs asynchronous conditions, nor between individuals who did or did not experience the rubber hand illusion. Bayes factors indicated substantial evidence for no physiological differences. In contrast to earlier reports, our autonomic data show the absence of a reliable change in physiological state during the rubber hand illusion. More encompassing perturbations of self-experience, for example in full body illusions, may nevertheless be coupled to, or facilitated by, changes in efferent autonomic activity and afferent viscerosensory feedback. Our findings suggest that such changes in bodily physiology are not sustained as an obligatory component of the rubber hand illusion.

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Section: Methodsmentioning

confidence: 99%

Absence of reliable physiological signature of illusory body ownership revealed by fine-grained autonomic measurement during the rubber hand illusion

2021

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“…The majority of the ECG signal power is within the 0.5 to 40 Hz range and the filter corner frequencies are chosen to match the specifications recommended by the American Heart Association, the American College of Cardiology and the Heart Rhythm Society [ 31 ] and to minimize uncertainty in the measurement of the R-R peak intervals used to calculate the HR [ 32 ]. Figure 7 b shows that the peak at 50 Hz which represents the mains electrical hum, in our measurements, the system-induced power line noise is reduced by 40 dB and the subsequent peak at 100 Hz is also not present.…”

Section: Methodsmentioning

confidence: 99%

Characterisation of Textile Embedded Electrodes for Use in a Neonatal Smart Mattress Electrocardiography System

Dore

Aviles-Espinosa

Luo

et al. 2021

Sensors

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Heart rate monitoring is the predominant quantitative health indicator of a newborn in the delivery room. A rapid and accurate heart rate measurement is vital during the first minutes after birth. Clinical recommendations suggest that electrocardiogram (ECG) monitoring should be widely adopted in the neonatal intensive care unit to reduce infant mortality and improve long term health outcomes in births that require intervention. Novel non-contact electrocardiogram sensors can reduce the time from birth to heart rate reading as well as providing unobtrusive and continuous monitoring during intervention. In this work we report the design and development of a solution to provide high resolution, real time electrocardiogram data to the clinicians within the delivery room using non-contact electric potential sensors embedded in a neonatal intensive care unit mattress. A real-time high-resolution electrocardiogram acquisition solution based on a low power embedded system was developed and textile embedded electrodes were fabricated and characterised. Proof of concept tests were carried out on simulated and human cardiac signals, producing electrocardiograms suitable for the calculation of heart rate having an accuracy within ±1 beat per minute using a test ECG signal, ECG recordings from a human volunteer with a correlation coefficient of ~ 87% proved accurate beat to beat morphology reproduction of the waveform without morphological alterations and a time from application to heart rate display below 6 s. This provides evidence that flexible non-contact textile-based electrodes can be embedded in wearable devices for assisting births through heart rate monitoring and serves as a proof of concept for a complete neonate electrocardiogram monitoring system.

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“…Confidence judgements were taken at the end of each trial, participants being asked to rate the confidence they had in their reported number of heartbeats. [30]. For the analysis, a threshold was applied to isolate R-wave peaks and to extract the number of heartbeats in a given time interval.…”

Section: Interoceptive Accuracy and Awarenessmentioning

confidence: 99%

Absence of reliable physiological signature of illusory body ownership revealed by fine-grained autonomic measurement during the rubber hand illusion

Critchley

Botan

Ward

2020

Preprint

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The neural representation of a ‘biological self’ is linked theoretically to the control of bodily physiology. In an infleuntial model, selfhood relates to internal agency and higher-order interoceptive representation, inferred from the predicted impact of efferent autonomic nerves on afferent viscerosensory feedback. Here we tested if an altered representation of physical self (illusory embodiment of an artificial hand) is accompanied by sustained shifts in autonomic activity.Participants (N=37) underwent procedures for induction of the rubber hand illusion (synchronous stroking of own unseen hand and observed stroking of artificial hand) and a control condition (asychronous stroking). We recorded electrodermal activity, electrocardiography, and non-invasive measurement of multiunit skin sympathetic nerve activity (SKNA) from the chest. We compared measures between task conditions, and between individuals who did and did not experience the illusion. Bayes factors quantified the strength of evidence for and against null hypotheses.Subjective reports and observed proprioceptive drift confirmed the efficacy of synchronous vs asynchronous condition in inducing illusory hand ownership. Stringent discriminant analysis classified 24 /37 individuals as experiencing the rubber hand illusion. Electrodermal activity, heart rate, heart rate variability, and SKNA measures revealed no autonomic differences between synchronous vs asynchronous conditions, nor between individuals who did or did not experience the rubber hand illusion. Bayes factors confirmed there was substantial evidence for no physiological differences.In contrast to earlier reports, our cardiac and electrodermal autonomic data, including fine grained SKNA measurement, provide substantial evidence for the absence of a reliable change in physiological state during induction or experience of the rubber hand illusion. If illusory body ownership is coupled to, or facilitated by, changes in efferent autonomic activity and afferent viscerosensory feedback, our findings suggest that such changes in bodily physiology are not sustained as an obligatory component of the illusion.

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Selection of Parameters of Bandpass Filtering of the ECG Signal for Heart Rhythm Monitoring Systems

Cited by 28 publications

References 3 publications

Absence of reliable physiological signature of illusory body ownership revealed by fine-grained autonomic measurement during the rubber hand illusion

Absence of reliable physiological signature of illusory body ownership revealed by fine-grained autonomic measurement during the rubber hand illusion

Characterisation of Textile Embedded Electrodes for Use in a Neonatal Smart Mattress Electrocardiography System

Absence of reliable physiological signature of illusory body ownership revealed by fine-grained autonomic measurement during the rubber hand illusion

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