Article Text

PDF

Atrial parasystole
  1. H. David Friedberg,
  2. Leo Schamroth
  1. Cardiac Section, Veterans Administration Center, Wood (Milwaukee), Wisconsin, U.S.A.
  2. Marquette School of Medicine, Milwaukee, Wisconsin, U.S.A.
  3. University of the Witwatersrand, Johannesburg, South Africa

    Abstract

    Two cases of atrial parasystole showing the various manifestations of the arrhythmia are presented. Analysis of the underlying mechanisms shows that atrial parasystolic bigeminy with `reversed' coupling is a form of escape-capture begeminy, sinus escapes being followed by an ectopic capture of the atria. Reasons are given for the rarity of atrial fusion beats. The similarities and differences between atrial and ventricular parasystole are explored. It is suggested that an atrial parasystolic pacemaker may lie within a major atrial preferential conducting pathway, and may consist of a congenitally ectopic fragment of sinus nodal tissue. The clinical significance of the arrhythmia is discussed; the associated diseases apparently represent a cross-section of medical ward experience.

    Statistics from Altmetric.com

    Request permissions

    If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.