In acute intracerebral hemorrhage, why is reversal of pre-existing anticoagulation important?

• A. To reduce infection risk
• B. To improve kidney function
• C. To restore hemostasis and limit hematoma expansion
• D. To treat fever

Answer: (C)

The key idea is restoring the blood’s ability to clot at the site of bleeding to stop the hemorrhage and prevent the hematoma from getting larger. In acute intracerebral hemorrhage, ongoing bleeding into brain tissue causes hematoma expansion, which is the main driver of neurological injury and worse outcomes. Anticoagulants blunt normal clot formation, so reversing them quickly re-establishes hemostasis at the bleeding site, limiting growth of the bleed and reducing damage to brain tissue. The approach to reversal depends on the anticoagulant: for warfarin, rapid reversal uses vitamin K plus a concentrate of clotting factors; for direct oral anticoagulants, specific antidotes are used when available (with alternatives like prothrombin complex concentrate if needed). This reversal is not about infection risk, kidney function, or fever, but directly about stopping the bleed and protecting brain tissue.