Comparison of Baseline Wander Removal Techniques considering the Preservation of ST Changes in the Ischemic ECG: A Simulation Study.
Comparison of Baseline Wander Removal Techniques considering the Preservation of ST Changes in the Ischemic ECG: A Simulation Study.
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DOI：
10.1155/2017/9295029
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发表时间：
2017
影响因子：
--
通讯作者：
Dössel O
中科院分区：
文献类型：
--
作者：
Lenis G;Pilia N;Loewe A;Schulze WH;Dössel O
诊断缺血或梗死的最重要的ECG标志物是ST段的变化。基线漂移是一种典型的伪影，它会破坏记录的ECG，并可能妨碍此类疾病的正确诊断。为了找到用于去除基线漂移的最适合的滤波器，需要关于在破坏伪影和后续滤波过程之前的ST改变的基本事实。为了创建所需的参考，我们使用了一个大型的模拟研究，使我们能够代表缺血性心脏在多尺度水平从心肌细胞的表面心电图。我们还创建了一个现实的基线漂移模型，以评估文献中常用的五种滤波技术。在模拟研究中，我们总共包含了来自765个电生理设置的550万个信号。我们发现，性能最好的方法是基于小波的基线消除。然而，对于医疗应用，巴特沃思高通滤波器是更好的选择，因为它计算成本低，精度几乎一样。尽管所有方法都在一定程度上修改了ST段，但它们都被证明优于不过滤基线漂移。
The most important ECG marker for the diagnosis of ischemia or infarction is a change in the ST segment. Baseline wander is a typical artifact that corrupts the recorded ECG and can hinder the correct diagnosis of such diseases. For the purpose of finding the best suited filter for the removal of baseline wander, the ground truth about the ST change prior to the corrupting artifact and the subsequent filtering process is needed. In order to create the desired reference, we used a large simulation study that allowed us to represent the ischemic heart at a multiscale level from the cardiac myocyte to the surface ECG. We also created a realistic model of baseline wander to evaluate five filtering techniques commonly used in literature. In the simulation study, we included a total of 5.5 million signals coming from 765 electrophysiological setups. We found that the best performing method was the wavelet-based baseline cancellation. However, for medical applications, the Butterworth high-pass filter is the better choice because it is computationally cheap and almost as accurate. Even though all methods modify the ST segment up to some extent, they were all proved to be better than leaving baseline wander unfiltered.