signal-averaged electrocardiography

signal-averaged electrocardiography

A technique that amplifies late potentials (high-frequency, low-amplitude signals at the end of a QRS complex), which are attributed to fragmented and delayed conduction through the borders of a myocardial scar.

The delayed conduction of late potentials allows re-entry of electrical impulses and increased susceptibility to ventricular arrhythmias; detection of late potentials by signal-averaged electrocardiography correlates well with inducibility of ventricular tachycardia (VT). It is a useful, noninvasive test for identifying increased risk of VT, but is of little use in patients with conduction defects
References in periodicals archive ?
The ART technology, called signal-averaged electrocardiography, with Holter recordings, was able to successfully monitor patients for irregular heartbeats, which are predictive of heart attacks, according to the study's authors.
Improved ventricular arrhythmia detection by different frequency-domain analysis technique of signal-averaged electrocardiography in chronic renal failure patients under maintenance hemodialysis in Taiwan.
Value of time- and frequency-domain analysis of signal-averaged electrocardiography for arrhythmia risk prediction in idiopathic dilated cardiomyopathy.
Objective: The signal-averaged electrocardiography (SAECG) is known to be a useful tool for extraction and analysis of low-amplitude signal components.
Key words: high-resolution signal-averaged electrocardiography, synthesized orthogonal electrocardiography, vectorcardiography, acute myocardial infarction.
Objective: We present the improved method of recognition of sustained ventricular tachycardia (SVT) based on new filtering technique (FIR), extended signal-averaged electrocardiography (SAECG) description by 9 parameters and the application of support vector machine (SVM) classifier.
Key words: ventricular tachycardia, signal-averaged electrocardiography
Signal-averaged electrocardiography (SAECG) involves computerized analysis of segments of a standard surface electrocardiogram (1).

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