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LOS ANGELES - Stroke sufferers can still benefit from clot-busting medicine even if they receive it an hour or so beyond the current three-hour window after symptoms start, an important new study suggests.
The finding could potentially extend treatment to thousands more people each year and prevent many from being left disabled. However, it does not change long-standing advice that stroke victims seek immediate help if they feel sudden numbness or weakness in the face, arm or leg.