Interference Dissociation

Abstract

Contradirectional interference results when 2 stimuli arising in different foci in any part of the heart spread in opposite directions toward each other. Interference dissociation is defined as that type of dissociation which is due to repetitive contradirectional interference. The electrocardiograms of 12 cases have been selected for analysis to illustrate many of the important features of interference dissociation. The various centers between which dissociation may theoretically occur are listed for reference. This series includes examples of dissociation due to interference between the following pairs of rhythms: Normal sinus rhythm and A-V nodal rhythm, normal sinus rhythm and multifocal idioventricular rhythms, sinus tachycardia and paroxysmal ventricular tachycardia, paroxysmal atrial tachycardia with block and idioventricular rhythm, simultaneous dissociated paroxysmal A-V nodal and ventricular tachycardias, and normal sinus rhythm and A-V nodal rhythm in the presence of the Wolff-Parkinson-White s...