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Normal Sinus Rhythm
Sinus Tachycardia
>100 bpm
Sinus Bradycardia
<60 bpm
Sinus Arrhythmia
Sinus Arrest
SA node doesn’t fire
-escape beats occur
-junctional pacemaker, atrial pacemaker, ventricular pacemaker
junctional pacemaker rescue beat
near AV node
40-60 bpm
most common
may see a retrograde P wave
narrow QRS
normal axis
positive lead I and aVF
Right axis deviation
+aVF, -I
Left axis deviation
+I, -aVF
extreme right axis deviation
-I, -aVF
Left ventricular hypertrophy
right ventricular hypertrophy
right atrial enlargement
left atrial enlargement
secondary repolarization abnormality
WPW