False Atrial Dissociation (The Deitz-Marques Phenomenon) And Its Dependence On Dyspnea

Abstract

According to Cohen and Scherf} complete dissociation between the atria can be diagnosed when two sets of P waves of different shapes exist, when these two groups of P waves are independent of each other, or when an ectopic rhythm is Umited to an atrium or part of one atrium while the other atrium is under the control of the sinus node. However, Marques expressed the opinion that the additional ectopic P wave and the following microfibrillation are extracardiac in origin and that they are related to the respiratory phases, since the ectopic P wave coincides with the beginning of inspiration and the following microfibrillation is produced during inspiratory phase. Recently, Lubbersf having confirmed the dependence of the ectopic P wave and the following microfibrillation on respiration, termed this relationship the Deitz-Marques phenomenon or Pseudo-Vorhofdop-pelrhythmus. Recently, we have observed three cases of the sarne phenomenon and confirmed its dependence on intense respiratory effort. © 1976, The Japanese Circulation Society. All rights reserved.