Abstract
The roots of electrocardiography (ECG) date back to more than 100 years. Since those times, it has developed into one of the most useful and ubiquitously applied diagnostic tools. It offers the possibility to record and analyze the electrical excitation process of the heart noninvasively by applying electrodes to the surface of the body and by suitably processing the signals using appropriate amplifiers, filters, recorders, and/or computers. By comparison to the regular pattern of ECG, pathophysiological processes and pathological states within the heart may be detected.
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