The question is good, but if you knew what LDL cholesterol was you wouldn't have put it quite this way!
Oysters don't contain LDL cholesterol. LDL is a particle your body makes out of the fats you eat, including the fats in oysters. Oysters are rich in cholesterol and other fats.
Eating oysters can raise your HDL, which is a good thing. If you overcook your oysters, however, they contain oxidized cholesterol, and that can raise your LDL levels, and that is a bad thing.
Now, I'm going to rephrase your question:
If seven maids with diabetes ate oysters for half a year, do you suppose, the walrus said, their arteries would stay clear?
I doubt it, said the carpenter, and shed a bitter tear.
But the carpenter would be wrong, if the oysters were eaten raw, or gently cooked!!