Mehta D, Camm A J
Department of Cardiological Sciences, St. George's Hospital Medical School, London, England.
Clin Cardiol. 1989 Jun;12(6):307-12. doi: 10.1002/clc.4960120605.
High-frequency, low-amplitude electrical activity during and in continuation with the ventricular electrogram in sinus rhythm is now accepted as an indirect marker for reentrant pathways in ventricular muscle. Because the amplitude of these signals is low, much effort has recently been directed toward finding methods of recording these noninvasively. This essentially involves averaging the electrocardiogram, amplifying it, and filtering out the low frequency and nonrepetitive signals. This review discusses the methods presently available for signal-averaged electrocardiography and their background. The clinical application of signal-averaged electrocardiograms in patients with or suspected to have ventricular tachycardia is summarized. Data regarding the incidence of abnormal signal-averaged electrocardiography in patients with "idiopathic" ventricular tachycardia compared with normal subjects and patients with ventricular tachycardia related to ischemic heart disease are presented.
在窦性心律时，心室电图期间及之后出现的高频、低振幅电活动，目前被公认为是心室肌折返通路的间接标志物。由于这些信号的振幅较低，最近人们投入了大量精力来寻找非侵入性记录这些信号的方法。这主要包括对心电图进行平均、放大，并滤除低频和非重复性信号。本综述讨论了目前可用于信号平均心电图的方法及其背景。总结了信号平均心电图在患有或疑似患有室性心动过速患者中的临床应用。还给出了与正常受试者以及与缺血性心脏病相关的室性心动过速患者相比，“特发性”室性心动过速患者异常信号平均心电图发生率的数据。
