1 Cardiac Laboratory, Cincinnati General Hospital, the Department of Medicine, University of Cincinnati College of Medicine, and the Laboratory of Biophysics, Department of Physics, University of Cincinnati, Cincinnati, Ohio
The autocorrelation function of the ventricular electrocardiogram was calculated on an IBM-650 computer. The resulting function can lie fitted by an exponential-cosine function. This result is typical for a mixture of periodic and unperiodic events. For different patients, various degrees of periodicity were put in evidence by this method on a quantitative basis; the ventricular response was never completely irregular. In all cases investigated so far, the period that corresponds to the periodic component of the autocorrelation function was more rapid than the average rate of ventricular conduction.
Submitted on September 19, 1960
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