Methods for Non-Invasive Detection of Ventricular Late Potentials — A Comparative Multicenter Study

To evaluate the methodological problems of the non-invasive registration of delayed depolarizations the results obtained with four different averaging systems in the same 109 patients (pts) (80 with coronary artery disease, 29 with dilative cardiomyopathy) were compared, The highresolution- ECG was obtained from the body-surface, high-gain amplified and filtered. The signal-to-noise ratio was improved with the averaging technique. The following systems were used: