Signal-averaged electrocardiography: a new technique for determining which patients may be at risk for sudden cardiac...

Signal-averaged electrocardiography is a useful diagnostic tool and screening test for those patients at risk for the development of VT. It is also useful in the evaluation of the patient after MI and the patient with unexplained syncope. The prognostic value of the signal-averaged ECG process is gaining popularity. More investigation is needed, especially in the areas of technique and significance of abnormalities, before the signal-averaged ECG becomes a routine test in diagnosing dysrhythmias. The signal-averaged ECG provides the health care team with a new, non-invasive test. Knowledge of its use and application can provide the clinician with additional information that can aid in the screening process for patients at risk for sudden cardiac death.