atrioventricular dissociation

dissociation /dis·so·ci·a·tion/ (-so″se-a´shun)

1. the act of separating or state of being separated.

2. the separation of a molecule into two or more fragments produced by the absorption of light or thermal energy or by solvation.

3. segregation of a group of mental processes from the rest of a person's usually integrated functions of consciousness, memory, perception, and sensory and motor behavior.

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atrial dissociation  independent beating of the left and right atria, each with normal rhythm or with one or both having an abnormal rhythm.

atrioventricular dissociation  control of the atria by one pacemaker and of the ventricles by another, independent pacemaker.

electromechanical dissociation  continued electrical rhythmicity of the heart in the absence of effective mechanical function.

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atrioventricular dissociation

n.

A condition in which the atria and ventricles contract independently, especially as resulting from the slowing of an atrial pacemaker or the acceleration of a ventricular pacemaker.

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atrioventricular (AV) dissociation,

a breakdown in the normal conduction of excitation through the heart, allowing the atria and ventricles to beat independently under the control of their own pacemakers.

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dissociation

the act of separating or the state of being separated.

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atrial dissociation

independent beating of the left and right atria, each with normal rhythm or with various combinations of normal rhythm, atrial flutter or atrial fibrillation.

atrioventricular dissociation

independent pacemakers in the atria and ventricles.

dissociation constant

the tendency of a solute to dissociate in solution.

hepatocyte dissociation

hepatocytes becomes detached from their neighboring cells, either generally or locally; a feature of death of the patient.

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atrioventricular dissociation

AV dissociation Cardiology The independent depolarization of the atria and ventricles, where atrial rhythm is controlled by one pacemaker and the ventricular rhythm is controlled by another, accompanied by a loss of A-V synchrony. See Third-degree block.