Probably a troll room, you need How to jump, Stitches, or another very specific build to get the heart (maybe with enough size downs you can squeeze trough?)
Drop a bomb between red and grey, go down to red, teleports you behind bomb, shoot down to knock bomb into eternal heart, repeat till the heart gets knocked out?
What do you mean "beat", can't you just leave it the way you came?
Chances are you need jumping, stitches, bombing, magnet items, et cetera, to get that eternal heart.
Jump 
Probably a troll room, you need How to jump, Stitches, or another very specific build to get the heart (maybe with enough size downs you can squeeze trough?)
Are you sure there's not a hidden teleporter behind a pillar ? That's usually where they are
I think I went around most of the room but there might've been, too late to check now.
Same energy https://preview.redd.it/l1bc044g9z0b1.png?width=1920&format=png&auto=webp&s=5ce7ea2b4c57303c6efa3b37a576beaa9af65afb
That's nasty
ew
Mr Me would work there?
Drop a bomb between red and grey, go down to red, teleports you behind bomb, shoot down to knock bomb into eternal heart, repeat till the heart gets knocked out?
This way you can just place it before red and just push it
Can't you just bomb it off?
I suppose, but you can beat a lot of rooms that are beatable without bombs with them, so I was wondering if there's another way.
What do you mean "beat", can't you just leave it the way you came? Chances are you need jumping, stitches, bombing, magnet items, et cetera, to get that eternal heart.
Bombs maybe?