Kawaguchi T, Okajima M
Laboratory of Medical Engineering and Computer Science, Fujita Health University School of Medicine.
Nihon Rinsho. 1995 Feb;53(2):372-6.
The advanced technology in signal processing has been utilized for recording high resolution electrocardiogram. It has presented some new valuable informations, possibly reflecting electrical characteristics of myocardium. Detecting ventricular late potential is practical, however, it uses only part of high resolution signals, because of difficulty of dividing into higher frequency components. Therefore, high resolutional signals were analyzed using numerical filter in order to detect and verify higher frequency components at mid-QRS stage on body surface electrocardiogram. Precordial signals were summation-averaged and underwent narrow peak filtering using various peek frequencies increasing stepwisely between 50 Hz and 400 Hz. In conclusion, this minutely analyzing system was able to pick up valuable informations in mid-QRS stage signal. For example, harmonization of peek phases in several frequencies at QRS complex had gaps that suggested abnormality of local myocardium.
信号处理方面的先进技术已被用于记录高分辨率心电图。它呈现出一些新的有价值信息，可能反映心肌的电特性。检测心室晚电位是可行的，然而，由于难以将其分解为更高频率成分，它仅使用了部分高分辨率信号。因此，为了检测和验证体表心电图中QRS波中期的更高频率成分，使用数值滤波器对高分辨率信号进行了分析。胸前信号进行了叠加平均，并使用在50赫兹至400赫兹之间逐步增加的各种峰值频率进行窄峰滤波。总之，这个精细分析系统能够提取QRS波中期信号中的有价值信息。例如，QRS波群中几个频率的峰值相位协调性存在间隙，提示局部心肌异常。
