[Improvement of signal averaged electrocardiography--basic composition, performance and standard of the signal
Abstract:
Useful electrocardiogram information is exist on the body surface in cases with low level cardiac signals' which are not identifiable with standard ECG techniques. Especially, His bundle potential and late potential were previously accessible only by invasive, catheter based methods. However, with the advancements in medical electronics device, signal averaged techniques with high gain low noise pre-amplifier and band pass filter, the record of body surface His bundle potential and late potential. The clinical study of Rozanski et al. and Simson demonstrated the relationship between late potential and ventricular tachycardia. Investigators are being made to standardize the technical approach. This papers reported basic composition and performance of signal averaged ECG and standard and features of body surface low level cardiac signals.
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