QRS AXIS:

 

 

The major direction of overall electrical activity within the ventricles during depolarization.

•Normal:                                        -30 to +90 degrees.

Left axis deviation:                      -30 to -90 degrees.

Right axis deviation:                    +90 to +180 degrees.

•Superior (Extreme right)

axis deviation:                         -90 to -180 degrees.

 

See “Axis