Page 78 - ECG dr shamol_Slide
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QRS—in Lead I QRS —in Lead III / AVF
Normal axis Positive (+) Positive (+)
left axis deviation Positive (+) Negative (-)
Right axis deviation Negative (-) Positive (+)
Indeterminate axis Negative (-) Negative (-)
Positive mean Negative mean
QRS complex upward ; QRS complex downward
