Strokes come in two forms. There's a clot-based stroke and a hemorrhage-based stroke. In both cases, fast treatment can help save the life and minimize the damage to the patient. Finding a stroke center is ideal. That's mostly what such facilities do, and they know how best to treat and help stroke patients.
For a clot-based stroke, a "clot buster" drug (TPA tissue plasminogen activator or similar drug) is the first line of action. That can melt away the clot and restore blood flow saving brain tissue. There's also a roto-rooter, type catheter that can be inserted to chew through a clot and remove it.
For a bleeding-based stroke, treatment can vary. If the bleed is active, they can insert a catheter to the site and plug the bleed. If the bleed has stopped on its own, then they typically resort to just sitting and watching to be sure it doesn't recur, and if the patient was on blood thinners, they'll more actively monitor or discontinue the blood thinners.
In either case, some brain damage will occur. The brain is generally hard-wired for certain parts to do certain things and the parts damaged will often fail to work as before, but brains are fairly plastic and with time and therapy can adjust and return to near normal function. You're typically looking at weeks/months of therapy and rehab to get back to a near-normal functionality again.
My mother had multiple strokes in her later years, so I've had too much experience in such matters. There's a lot of anecdotal evidence that strokes lead to dementia. My mother and an uncle both had that happen to them. Surviving a stroke is the big first step. They kill a lot of people. Once you survive then it all comes down to time. In general, most people can return to a relatively normal, or new normal state over time. A lot depends on the severity of the stroke and where it occurs. Good luck.
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