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Dysrhythmia Management, Pacemakers, And Defibrillators
DYSRHYTHMIA 
MANAGEMENT, 
PACEMAKERS, AND 
DEFIBRILLATORS 
HESI EXAM RN Critical Care Exam 1 (1) 
Dysrhythmia Management, Pacemakers, and Defibrillators 
Electrical impulses are generated from SA node (pacemaker of the heart). SA node is located on top of atrium. 
 Job of SA node to set heartrate. 
 SA node fires impulses rate at 60-100 beats per minute. 
AV node acts as secondary pacemaker. If SA node doesn’t fire, the AV node can initiate impulses. Problem is that AV node generates impuls...