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EKG HW1

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Question
Answer
Sinotrial Node Inherent Rate   60-100 BPM  
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Atrioventricular Junction Inherent Rate   40-60 BPM  
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Purkinje Fibers Inherent Rate   20-40 BPM  
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Lead I Placements   Left arm = +, Right arm = -  
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Lead II Placement   Left foot = +, Right arm = -  
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Lead III Placement   Left foot = +, Left arm = -  
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P Wave   Atrial Depolarization  
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PR Interval   Spread of impulse through AV node, bundle of His, right and left bundle branches, and Purkinje fibers  
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QRS complex   Spread of electrical impulse through the ventricles (Ventricle depolarization)  
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T Wave   Ventricle repolarization  
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QT Interval   Total ventricular activity, from ventricular depolarization to repolarization  
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Normal P Wave Characteristics   Smooth and rounded, no more than 2.5mm in height, no more than 0.11 sec in duration, positive leads I, II, aVF, and V2 through V6  
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Normal PRI Characteristics   0.12 to 0.20 sec, Shortens as heart rate increases, Lengthens as HR decreases  
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QRS complex Normal Duration   0.06-0.10 sec  
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Wide QRS Complex may indicate   incomplete or complete bundle branch block  
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ST Segment is elevated if it is   more than 1 mm in a limb lead, more than 2 mm in a chest lead  
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Normal T Wave Characteristics   slightly asymmetric, 5mm or less in height in limb lead or 10mm in chest lead, 0.5 mm or more in height in leads I and II  
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Peaked T Wave may be a sign of   Hyperkalemia  
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