My mother had a stroke when she was 89. She lived with us and I was talking to her as it happened. I had no idea it could happen between one word and the next. There was a TV ad campaign called Think FAST (face, arms, speech, time to phone an ambulance), so that's what I did. She'd had a scan and was in the stroke unit within an hour and a half. Even though the clot buster was only licensed for up to 50, she was given it and her score dropped from 22 to 6 after 24 hours.
My mother smoked from her 20s to 70 when she just stopped. But she also had atrial fibrillation and had been told she couldn't take warfarin as she'd had ulcers; the medication she was given instead wasn't nearly as effective. She was on warfarin after the stroke though.