Sorting ECGs by lag irreversibility
利用滞后不可逆性区分心电图AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要直接提出并检验离散时间序列的滞后不可逆性指标,属于时间序列方法,其具体应用为心电信号。
利用滞后不可逆性区分心电图AI 解读 ↓
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In this work we introduce the lag irreversibility function as a method to assess time-irreversibility in discrete time series. It quantifies the degree of time-asymmetry for the joint probability function of the state variable under study and the state variable lagged in time. We test its performance in a time-irreversible Markov chain model for which theoretical results are known. Moreover, we use our approach to analyze electrocardiographic recordings of four groups of subjects: healthy young individuals, healthy elderly individuals, and persons with two different disease conditions, namely, congestive heart failure and atrial fibrillation. We find that by studying jointly the variability of the amplitudes of the different waves in the electrocardiographic signals, one can obtain an efficient method to discriminate between the groups already mentioned. Finally, we test the accuracy of our method using the ROC analysis.