This is stuff for a cardiologist, but I'll take a stab. Basically repolarization has to do with the electromagnetic action generating the heartbeat and any "variant" means a wave form (usually in the S/T segment) that is out of the ordinary.
It (repolarization variant) might point to a past heart attack.
"Inferior Infarct" refers to a heart attack caused by blockage of the right coronary artery.
I read a blurb that says that the "depolarization variant" often means nothing, especially in young men, but it DOES seem to signal the need for a closer look with a stress/imaging, or an angiogram to see if there is evidence of an old heart attack.
I hope this helped a little, but, know well, I'm flying by the seat of my pants here!