Some aspects of the wideband recording of the electrocardiogram.
The physiological mechanisms responsible for the high frequency components of the electrocardiographic signals in different frequency ranges are still unknown. These components have been studied in the frequency domain as well as in the time domain. Numerous clinical and experimental studies have focused upon the incidence and interpretation of high frequency notches and slurs under different conditions in the myocardium. However, the analysis of the high frequency components appeared to be tedious and imprecise, and the interpretation of its results difficult and controversial, and strongly dependent upon empirically determined standards which still require thorough evaluation. Digital methods for processing electrocardiographic signals developed during the last decade have given rise to a variety of fast and reliable approaches for analyzing the information carried by the electrocardiogram. Many researchers have applied such methods to various clinical situations in human studies and to different kinds of interventions in animal studies. These developments prompted us to review research in the field of wideband recording of the electrocardiogram and to briefly discuss some of the aspects that still require elucidation.
School of Physics, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Israel.
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Mor-Avi
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Akselrod
D000818:Animals; D003327:Coronary Disease / Q000175:diagnosis*; D004562:Electrocardiography / Q000295:instrumentation*; D006801:Humans; D012815:Signal Processing, Computer-Assisted