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27 Cards in this Set
- Front
- Back
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artifact
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EKG waveforms from sources outside the heart
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Where is the SA Node located?
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in the right atrium
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The starting point for electrical impulses
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SA Node (sinoatrial node)
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The heart's main pacemaker
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SA Node (sinoatrial node)
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Where is the AV Node located?
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in the front of the right atrium
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The conduction pathway that leads out of the AV node
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bundle of HIS
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True or False: The bundle of His has pacemaker cells
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FALSE
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What is the rate that the bundle of His initiates electrical activity?
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40-60 times per minute
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Time which impulse travels from the SA node to the atria and downward to the ventricles
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PR Interval (PRI)
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What is the normal PR interval?
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0.12-0.20 (3-4 boxes)
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What displays the sawtooth pattern?
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Atrial Flutter
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What lab value to you check with atrial flutter?
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electrolytes
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What are the hallmarks of sinus rhythm?
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"P" present, round and upright
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Junctional rhythm
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rhythms that initiated in the area of the AV junction
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Who has a shorter QT segment- men or women?
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Men have a shorter QT segment
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What does a long QT segment increase a patient's risk for?
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death from arrhythmias
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In which direction do you read strips?
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Left to right
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How are heart rhythms classified?
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regular or irregular
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The sinoatrial node is located in the____________
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right atrium
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The AV node is located in the
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right atrium
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The intrinsic firing rate of the SA node is__________ bpm
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60-100
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The intrinsic firing rate of the AV junction is__________ bpm
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40-60
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The electrogardiogram is used to:
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evaluate electrical activity in the heart
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The normal conduction pattern of the heart follows the sequence:
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SA node, Internodal pathways, AV node, bundle of His, Bundle branches, Purkinje fibers
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The intrinsic firing rate of the Purkinje network is________ bpm
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20-40
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The SA node recieves its blood supply mainly from the :
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SA artery
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abnormal heart rhythms are:
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dysrhythmias
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