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dc.contributor.authorSauwaluk Dachaen_US
dc.contributor.authorLuc Janssensen_US
dc.contributor.authorAntenor Rodriguesen_US
dc.contributor.authorZafeiris Louvarisen_US
dc.contributor.authorLotte Janssensen_US
dc.contributor.authorRik Gosselinken_US
dc.contributor.authorDaniel Langeren_US
dc.date.accessioned2019-09-16T12:48:35Z-
dc.date.available2019-09-16T12:48:35Z-
dc.date.issued2019-01-01en_US
dc.identifier.issn1664042Xen_US
dc.identifier.other2-s2.0-85069894842en_US
dc.identifier.other10.3389/fphys.2019.00885en_US
dc.identifier.urihttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85069894842&origin=inwarden_US
dc.identifier.urihttp://cmuir.cmu.ac.th/jspui/handle/6653943832/66609-
dc.description.abstractCopyright © 2019 Dacha, Janssens, Rodrigues, Louvaris, Janssens, Gosselink and Langer. Background: Electrocardiogram (ECG) contamination is present in diaphragm electromyography (EMGdi) recordings. Obtaining EMGdi without ECG contamination is crucial for EMG amplitude analysis. Manually selecting EMGdi in between QRS complexes has been most commonly applied in recent years (manual method). We developed a semi-automated analysis method based on Least Mean Square Adaptive Filtering combined with a synchronously recorded separate ECG channel to remove ECG artifacts from the EMGdi signals. We hypothesized that this approach would shorten analysis duration and might minimize the potential for inter-rater disagreement. Aims: We aimed to evaluate agreement between the semi-automated method and the manual method and inter-rater reliability of the manual method. Methods: Electromyography signals of seven patients with COPD were recorded using an esophageal catheter during an exercise test on a cycle ergometer. Four patients subsequently participated in an inspiratory muscle training (IMT) program for 8 weeks. After IMT, the tests were repeated. EMGdi/EMGdiMax as obtained either manually by the two assessors or retrieved from the semi-automated method were compared. Results: Semi-automated EMGdi/EMGdiMax agreed well with values obtained by one of the two manual assessors (assessor 1) both at pre-intervention measurements (mean difference -0.5%, 95% CI: -19.6 to 18.6%) and for the pre/post IMT differences (mean difference 1.2%, 95% CI: -16.8 to 19.2%). Intra-class correlation coefficients between methods were 0.96 (95% CI: 0.94-0.97) at pre-intervention measurements and 0.78 (95% CI: 0.58-0.89) for pre/post IMT differences (both p < 0.001). EMGdi/EMGdiMax from assessor 2 was systematically lower than from assessor 1 and agreed less well with the semi-automated method both at pre-intervention measurements (mean difference: 9.3%, 95% CI: -11.4 to 29.9%) and for pre/post IMT differences (mean difference 7.0%, 95% CI: -20.4 to 34.4%). Analysis duration of the semi-automated method was significantly shorter (29 ± 9 min) than the manual method (82 ± 20 min, p < 0.001). Conclusion: The developed semi-automated method is more time efficient and will be less prone to inter-rater variability that was observed when applying the manual analysis method. It is, therefore, proposed as a new standard for objective EMGdi amplitude analyses in future studies.en_US
dc.subjectBiochemistry, Genetics and Molecular Biologyen_US
dc.subjectMedicineen_US
dc.titleComparison between manual and (Semi-)automated analyses of esophageal diaphragm electromyography during endurance cycling in patients with COPDen_US
dc.typeJournalen_US
article.title.sourcetitleFrontiers in Physiologyen_US
article.volume10en_US
article.stream.affiliationsUniversity of Athens Medical Schoolen_US
article.stream.affiliationsKU Leuven– University Hospital Leuvenen_US
article.stream.affiliationsUniversidade Estadual de Londrinaen_US
article.stream.affiliationsKU Leuvenen_US
article.stream.affiliationsUniversiteit Hasselten_US
article.stream.affiliationsChiang Mai Universityen_US
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