ECG关联维数的导联差异

Differences in Correlation Dimensions of Different Leads ECG Signals.

研究了不同导联ECG的非线性特征量关联维数,计算了MIT心律不齐数据库中10个记录的2个导联每6秒段ECG的关联维数值,采用配对t检验检验不同导联关联维数值的差异,结果表明不同导联的ECG关联维数值有显著差异。

ECG signals of different leads come from the same ECG attractor, they should have the same dimension, whereas it is not true in our experiment. Using nonlinear dynamics techniques such as correlation dimension （CD） can probe the nonlinear properties of multiqead ECG. The CDs of 2 leads every 6 second ECG segments from several recordings of MIT-BIH Arrhythmia Database are calculated. Results show that CDs of different leads ECG signals have significant difference although they come from the same ECG attractors.