atrial dissociation is characterized by different types of p waves captured in an electrocardiogram, usually seen in critically ill or post-cardiac transplantation patients. our case demonstrates a 55-year-old man, presenting with chest pain (unstable angina) in the emergency department with transient double-p waves; representing the phenomenon. our case did not have any of the suggested causes...

Atrial dissociation is characterized by two sets of independent P waves on the electrocardiogram and two atrial beats independent of each other. One atrium is under the control of the dominant pacemaker (sinus node) which also controls the ventricles, while the other atrium or part of the other atrium is under the control ofan ectopic pacemaker, resulting in unilateral ectopic atrial rhythm, be...

Two independent sets of P waves have occasionally been observed in the electrocardiograms of experimental animals and attributed to dissociated activity of the two atria (Condorelli, 1929; Scherf and Siedek, 1934). The studies of Marcel and Exchaquet (1938) on the human fetus strongly suggest that atrial dissociation occurs in man, and electrocardiograms have also been illustrated and reported ...

Atrial fibrillation is the most common pathologic supraventricular tachycardia. It has many causes, is an expensive disease, impairs quality of life and leads to an increased risk of death. Atrial dissociation is characterised by the presence of two independent sets of P-waves. This peculiar abnormality may give rise to the scenario where one atrium is in atrial fibrillation while the other is ...

Twenty-one patients with atrioventricular (AV) bypass tracts underwent electrophysiologic studies. The bypass tract was left-sided in 15 patients, septal in five and right-sided in one patient. Orthodromic AV-reciprocating tachycardia was induced in all 21 patients, with a mean tachycardia cycle length of 342 59 msec. The introduction of single stimuli in the high right atrium during tachycardi...

A 27-year-old man with primary oxalosis and extensive visceral involvement was maintained on long-term chronic hemodialysis. He had an episode of presyncope associated with electrocardiographic findings of an erratic atrial rhythm, atrioventricular dissociation due to an accelerated junctional rhythm and right bundle branch block. Electrophysiologic studies showed irregular atrial depolarizatio...

Numerous authors have claimed to demonstrate independent rhythms in the 2 atria. Hering' in 1900 first recorded dissociation of the atria in the experimental animal, whereas Wenckebach' in 1906 was first to report it in man. Neither of these authors illustrated his claim with published electrocardiograms. A number of these publications invite special comment. Schrumpf3 published the first illus...