Like you alluded to that infarct likely completed but if there was optimizing of the ischemic CM to be done (diuresis, GDMT, etc), that should be done before an elective knee.
When I was a resident I'd see some physicians or CRNAs say stuff like "oh we take back patients sicker than that all the time"...
I was on a practice management rotation where you pretended to be the care team attending. Had this woman come in w/ COVID 1-2 months ago with progressively worsening DOE since then. Almost collapsed in the lobby and needed a wheelchair to get into pre-op. I pushed for an admission and workup for ischemia, PE, new HF, etc. The anesthetist (who's excellent) said the above to me. The workup ended up being negative for anything that'd kill the pt on induction and they proceeded uneventfully the next day.
But I was grateful people weren't stamping their feet when I advocated for delaying.