I learned of the FAST acronym on an epidose of “House M.D.”! I’d gotten the STR one in an e-mail. Not sure which would be easier to remember, but they’re similar in what observations to make.
FAST is what is being used by the NHS in Britain in the TV adverts I think FAST is best because it emphasis that you need to be fast.
As one poster said if you get the patient to the hospital in the 3 hour window they can administer a drug to clear the clot.