Abstract
An electrocardiogram enhancement system and apparatus is provided. Small amplitude, high frequency notches associated with myocardial disease and arrhythmias can be recorded by conventional chart recorders. In addition, the notches are clearly visible in the recorded waveform for visual detection and analysis of the notches by medical personnel. In the system of the present invention electrocardiogram signals having small amplitude, high frequency notches are enhanced; first, by selectively amplifying the notches while keeping the amplitude of the remainder of the waveform constant and, second, by uniformly expanding the signal in the time domain wherein the inter-component frequency and inter-component phase relationships are maintained.
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