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EKG HW1

QuestionAnswer
Sinotrial Node Inherent Rate 60-100 BPM
Atrioventricular Junction Inherent Rate 40-60 BPM
Purkinje Fibers Inherent Rate 20-40 BPM
Lead I Placements Left arm = +, Right arm = -
Lead II Placement Left foot = +, Right arm = -
Lead III Placement Left foot = +, Left arm = -
P Wave Atrial Depolarization
PR Interval Spread of impulse through AV node, bundle of His, right and left bundle branches, and Purkinje fibers
QRS complex Spread of electrical impulse through the ventricles (Ventricle depolarization)
T Wave Ventricle repolarization
QT Interval Total ventricular activity, from ventricular depolarization to repolarization
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
Normal PRI Characteristics 0.12 to 0.20 sec, Shortens as heart rate increases, Lengthens as HR decreases
QRS complex Normal Duration 0.06-0.10 sec
Wide QRS Complex may indicate incomplete or complete bundle branch block
ST Segment is elevated if it is more than 1 mm in a limb lead, more than 2 mm in a chest lead
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
Peaked T Wave may be a sign of Hyperkalemia
Created by: adalmadge
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