Autocorrelation and Crosscorrelation of Electrocardiographic Record during Ventricular Fibrillation

(1) Auto-and crosscorrelation of the electrocardiographic record during experimental ventricular fibrillation were investigated in dogs. (2) At the onset of the ventricular fibrillation a periodic function was observed in the extremity leads and the regularity of the wave vanished earlier in Lead I than Lead II. (3) In the direct leads the wave of the ventricular fibrillation included the regular component which was indicated by periodicity in the auto- and crosscorrelation. Except at the onset of fibrillation there was no relation between the waves of both ventricles, as shown by the random function in crosscorrelation.