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A modified correlation method for T-wave alternans detection

机译：一种改进的相关性T波交替信号检测方法

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摘要

Identification of individuals who are at risk for sudden cardiac death (SCD) remains a formidable challenge. T-wave alternans (TWA) evaluation is emerging as an important tool for risk stratification in patients with heart diseases. Several methods have been developed in recent years to detect and quantify TWA. One such method is known as the correlation method (CM). This method performs well for different levels of TWA and phase shifts in the time domain, but it is sensitive to noise and requires higher quality of electrocardiogram (ECG) signal for test. In this paper, we propose a modified correlation method (MCM) to ensure a robust and accuracy detection of TWA. Compared with CM, MCM add a stage of T-wave curve fitting before media T-wave template, and the TWA magnitude is obtained by meaning the maximum absolute difference between even and odd T-wave. Our assessment study demonstrates the improved performance of the proposed algorithm.
机译：识别有心脏猝死（SCD）风险的个人仍然是一个艰巨的挑战。 T波交替蛋白（TWA）评估正在成为心脏病患者风险分层的重要工具。近年来已经开发了几种方法来检测和量化TWA。一种这样的方法称为相关方法（CM）。该方法对于时域中不同级别的TWA和相移表现良好，但对噪声敏感，并且需要更高质量的心电图（ECG）信号进行测试。在本文中，我们提出了一种改进的相关方法（MCM），以确保TWA的鲁棒性和准确性。与CM相比，MCM在介质T波模板之前增加了一个T波曲线拟合阶段，其TWA幅值是通过表示偶数和奇数T波之间的最大绝对差而获得的。我们的评估研究证明了所提出算法的改进性能。

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