Medical Term:

atrioventricular dissociation

 

Definition:

  1. any situation in which atria and ventricles are activated and contract independently, as in complete AV block;
  2. more specifically, the dissociation between atria and ventricles that results from slowing of the atrial pacemaker or acceleration of the ventricular pacemaker at nearly (although rarely exactly) equal rates, each depolarizing its own chamber, thus interfering with depolarization by the other (interference-dissociation).
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