Related Experiment Videos
Insights
Atrioventricular dissociation, particularly "dissociation with interference," is controversial. Experts suggest abandoning this term for clearer diagnosis of primary rhythm or conductivity disorders for better treatment.
Area of Science:
- Cardiology
- Electrophysiology
Context:
- Atrioventricular dissociation, especially "dissociation with interference," has long been debated among cardiologists.
- This condition involves independent atrial and ventricular activity, not linked to orthograde atrioventricular block.
Purpose:
- To clarify the mechanisms and terminology of atrioventricular dissociation.
- To propose a more appropriate classification for improved therapeutic strategies.
Summary:
- Atrioventricular dissociation is secondary, arising from primary rhythm or conductivity issues, or secondary rhythm acceleration.
- Causes include sinus bradycardia, blocks, compensatory pauses, and tachycardias with retrograde block.
- ECG examples illustrate these diverse mechanisms.
Impact:
- Recommends abandoning the ambiguous term "dissociation with interference."
- Advocates for classifying these disorders as primary rhythm or conductivity issues, indicating incomplete atrioventricular dissociation.
- Aims to facilitate more precise diagnosis and therapy selection for cardiac rhythm disorders.
Abstract:
Cardiac rhythm disorders called atrioventricular dissociation, especially the so-called dissociation with interference have been causing controversy among the cardiologists for a long time. The latter term implies an independent activity of the atria and ventricles, that is in no way connected with an orthograde atrioventricular block, and that develops in the presence of intermittent normal conductivity of sinus impulses. This disorder is always of a secondary nature and it may be due to the disorders in the formation of the primary rhythm, or conductivity of the impulse (passive form), or acceleration of the secondary rhythm (active form). The causes of such atrioventricular dissociation may lie in sinus bradycardia, sinoauricular or incomplete atrioventricular block, compensatory pauses after extra-systoles, atrioventricular and ventricular tachycardia (paroxysmal or nonparoxysmal) with a retrograde atrioventricular block, etc. Examples of ECG patterns illustrating most of the above mechanisms are presented. Due to the existence of several mechanisms that cause atrioventricular dissociation, and due to the fact that individual authors imply different meanings by the term "interference", it seems reasonable to abandon the term "dissociation with interference". In such case it would seem more appropriate to call the state a primary rhythm or conductivity disorder indicating an incomplete atrioventricular dissociation for a proper choice of therapy.