【摘要】 T波电交替(TWA)是指体表心电图中T波形态、振幅、极性、持续时间或者整个ST-T波段逐搏交替变化的心电变异现象。相关方法能很好地检测非稳态的TWA,但是它本身对噪声非常敏感。本文在原相关方法计算相关指数的基础上,通过改进TWA发生的判定条件并采用线性拟合的办法,有很好的抗噪声干扰能力,从而达到了检测非稳态TWA的效果。通过模拟和临床数据试验证实了本方法的有效性。更多还原

【Abstract】 T-wave alternans(TWA) refers to a phenomenon appearing in the surface electrocardiograph(ECG) as a consistent fluctuation in morphology and amplitude of the T wave on an "every-other-beat" basis.Correlation method(CM) has a certain ability to detect the non-stationary TWA,but it is very sensitive to noise.In this paper we propose a modified correlation method to ensure a stable and accurate detection of non-stationary TWA.Compared to the CM,the method modifies the judge condition and uses the linear fitting to limit the noise to gain the ability of detecting of non-stationary TWA.Our simulation and clinical data assessment study demonstrates the improved performance of the proposed algorithm.更多还原