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タイトル別表記
心房細動中の心電図におけるSample entropy
著者
キーワード
atrial fibrillation
electrocardiogram
sample entropy
time-series data
抄録
【Background】 Atrial fibrillation (AF) is an arrhythmia commonly encountered in clinical practice. There is a high risk of thromboembolism in patients with AF. Nonlinear analyses such as electroencephalogram (EEG), electrocardiogram (ECG), and respiratory movement have been used to quantify biological signals, and sample entropy (SampEn) has been employed as a statistical measure to evaluate complex systems. In this study, we examined the values of SampEn in ECG signals for patients with and without AF to measure the regularity and complexity.
【Methods】 ECG signals of lead II were recorded from 34 subjects without arrhythmia and 15 patients with chronic AF in a supine position. The ECG signals were converted into time-series data and SampEn was calculated.
【Results】 The SampEn values for the group without arrhythmia were 0.252 ± 0.114 [time lag (τ) = 1] and 0.533 ± 0.163 (τ = 5), and those for the chronic AF group were 0.392 ± 0.158 (τ = 1) and 0.759 ± 0.246 (τ = 5). The values of SampEn were significantly higher in the group with chronic AF than in the group without arrhythmia (P < 0.01 for τ = 1, P < 0.004 for τ = 5). The constructed three-dimensional vectors were plotted in time-delayed three-dimensional space. We used time lags of τ = 5 and τ = 1. The shape of the loops of the three-dimensional space was better for τ = 5.
【Conclusion】 The values of SampEn from ECG for chronic AF patients were higher than for subjects without arrhythmia, suggesting greater complexity for the time-series from chronic AF patients. SampEn is considered a new index for evaluating complex systems in ECG.
資料タイプ
学位論文(要旨のみのもの含む)
外部リンク
最新掲載誌名
発行日
2018-03-01
著者版フラグ
博士論文全文を含む
著作権表記
注があるものを除き、この著作物は日本国著作権法により保護されています。
掲載情報
This research was published by Yonago Acta Medica: Takuya Horie, Naoto Burioka, Takashi Amisaki and Eiji Shimizu. Sample Entropy in Electrocardiogram During Atrial Fibrillation. Yonago Acta Medica, 2018, 61, pp.49-57
言語
英語
学位論文授与番号
甲第884号
学位授与年月日
2018-03-01
学位名
博士(医学)
学位授与機関
鳥取大学