Axis Deviation

Question 1

normal axis deviation

Answer 1

I and II are positive
Between -30 and +90

Question 2

Left axis deviation

Answer 2

Lead I is positive, and lead II is negative.
Commonly caused by left ventricular hypertrophy or inferior wall myocardial infarction.

Question 3

Right axis deviation

Answer 3

Lead I is negative, and lead II is positive.
Seen in conditions like right ventricular hypertrophy, pulmonary hypertension, or a pulmonary embolism.