Patients with mild to moderate ischemic strokes who received a tissue plasminogen activator therapy within 90 minutes after symptoms emerged were less likely to have developed a disability three months later compared with those who got the clot-busting drugs less quickly, according to a study of more than 6,800 stroke patients in Europe. "Despite the time window of 4.5 hours to give clot-busting drugs, there are clear differences between patients treated ultra-early -- within 90 minutes -- and those treated later," the study's lead author said. The findings appear in the journal Stroke.

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