-normal MEA: QRS is positive (or zero) in I, II, or aVF, and is negative in aVR

-right axis deviation (RAD): QRS is negative in I, positive in aVR

-left axis deviation (LAD): QRS is negative in III, aVF, and II

-if your axis spills out to beyond 90 degrees and you are in between 90 and 180, you are in right axis deviation, you can be put there if you have tight ventricular hypertrophy, the muscle will build up and the vector will shift the axis of the heart, you can't have this, go back and check it

-left ventricular hypertrophy will put you into LAD, too much left ventricular muscle mass

-positive aVL and positive aVF means you are in the bottom right quadrant (optimal quadrant)

-negative lead I and positive aVF puts you in RAD