A patient with an irregular sinoatrial (SA) node conduction has a permanent pacemaker with the code AAIOO and is now going home
The patient asks, "What happens when my real SA node fires on its own?" How should the nurse respond regarding what the pacemaker should do? a. Not fire
b. Fire only the ventricles
c. Change the rate of firing
d. Fire both the atria and the ventricles.
A
The code is A (chamber-paced) atria, A (sense impulse) atria only, I (inhibit) inhibit firing from the pacemaker, O (rate modification) no rate modification, and O (multichamber) no other chambers to be stimulated by the pacemaker. If the SA fires on its own, the pacemaker does nothing until it fails to sense an impulse.
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