T波对齐在T波交替谱分析中的对比研究  

Study on the T-wave Alignment Strategy of Detecting T-wave Alternans Based on Spectral Method

作　　者：魏珑[1] 魏佑震 赵捷[3] 李合菊[1] 

机构地区：[1]莱芜职业技术学院,山东莱芜271100 [2]上海东方医院,上海200120 [3]山东师范大学物理与电子科学学院,山东济南250014

出　　处：《中山大学学报（自然科学版）》2014年第4期79-82,共4页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：山东省科技发展计划政策引导类资助项目(2013YD01024);山东省自然科学基金资助项目(ZR2010HM020);济南市高校自主创新计划资助项目(201102005)

摘　　要：T波交替是一种心电变异现象,具体表现为心电信号中T波段形态和幅度逐拍交替变化。传统的谱分析法一般通过拍频域中0.5 cycle/beat的功率谱值来检测T波交替,但在检测过程中不同的对齐方式将影响谱分析T波交替检测结果,因此将基于谱分析方法进行T波交替检测,重点对比研究峰值对齐及点乘最大对齐两种方式,并相应地给出最佳对齐方式,研究可得点乘对齐所测的交替幅度更接近于真实幅度。T-wave alternans （ TWA） is a variation phenomenon characterized by beat to beat alternation in the morphology and/or amplitude of the T-wave of electrocardiographic .Traditional frequency spectral method （SM） uses the power spectrum at the 0.5 cycle/beat frequency to detect TWA , however, the re-sults are affected by the alignment strategy during detection .Therefore, the work researches on the peak alignment and dot-product alignment affecting TWA detection based on the spectral method and provides the optimum alignment strategy .The research proves that the amplitude based on dot-product alignment estimates TWA more accurately .

关 键 词：T波交替 谱分析法 对齐方式 

分 类 号：R318[医药卫生—生物医学工程]