alleryStart learning →Within what time after a thrombotic stroke does a thrombolytic agent significantly improve prognosis?
AWithin 30 minutes
BWithin 12 hours
CWithin 3 hours
DWithin 24 hours
Answer & Solution
Correct answer: C. Within 3 hours
1. Thrombolytic agents speed the degradation of an abnormal clot.
2. Given within 3 hours of a thrombotic stroke, they improve the prognosis significantly.
3. The cause must be established first, because some strokes are hemorrhagic rather than thrombotic.
4. Giving a thrombolytic into a hemorrhage would worsen the bleed, which is why the time window alone never justifies treatment.
_Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 18 "The Cardiovascular System: Blood", section 18.5 Hemostasis_
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