Axis

Axis
-Refers to the direction of electrical depolarization
-It is determined by the direction of the QRS complex in lead I and avF

Normal Axis
-Positive deflection of QRS complex lead I
-Positive deflection of QRS complex lead avF

Left Axis Deviation
-Positive deflection of QRS complex in lead I
-Negative deflection of QRS complex in lead avF

Right Axis Deviation
-Negative deflection of QRS complex in lead I
-Positive deflection of QRS complex in lead avF

Extreme Right Axis Deviation
-Negative deflection of QRS complex lead I
-Negative deflection of QRS complex lead avF