Late administration of alteplase improves recovery for some stroke patients
In short: A study of 821 patients found that administering the clot-busting drug alteplase between 3 and 4.5 hours after a stroke began significantly improved recovery rates compared to a placebo. While the treatment was associated with a higher risk of brain bleeding, it still provided a measurable clinical benefit for many individuals.
The research aimed to determine if giving alteplase within this specific late window was both safe and effective, as previous evidence was limited beyond the 3-hour mark. The trial used a double-blind design where patients were randomly assigned to receive either the medication or a placebo.
While the study demonstrated improved outcomes at 90 days, it also showed that alteplase led to more frequent intracranial hemorrhages than the placebo. A limitation of this research is its focus on a specific time window and the inherent risk-benefit trade-off regarding bleeding.
Why it matters: Timing is critical in stroke treatment, but medication can still offer benefits even slightly past the standard three-hour window.
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Sources
- Summary by Intellect · source: Research: Hacke et al. (2008). Thrombolysis with alteplase 3 to 4.5 hours after acute ischemic stroke. The New England journal of medicine.
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