Since beta testing and whatnot throws off my more recent KDR, I'll use the one back when I played 0.9.9.1:
119.86:1 (full numbers are 85821:716)
Although to be fair there are a lot of games where I won't get past, say, level 2, and just QY to avoid spending time on the death screen, so if we were to count all the "almost deaths" it'd probably be a little lower.
EDIT: Also, MaiZure, we're talking about kill-to-death ratio, not death-to-victory ratio.