A-V DISSOCIATION DUE TO DEFAULT A-V DISSOCIATION “A-V DISSOCIATION REPRESENTS THE CIRCUMSTANCE IN WHICH THE ATRIA ARE ACITIVATED BY ONE PACEMAKER AND THE VENTRICLES BY ANOTHER—THE TWO PACEMAKERS COMPETING FOR CONTROL OF VENTRICULA R ACTIVATION. IN THE RESULTING DUEL, THE ONE WITH THE FASTEST RATE WILL DOMINATE THE OVERALL RHYTHM.” IF THE SINUS NODE IS LAZY, IT PERMITS AN AUXILLARY PACEMAKER TO SURFACE – “A-V DISSOCIATION BY DEFAULT”