You are treating an 85-year-old female patient in the emergency room for head trauma on an antivitamin K (AVK) prescribed for atrial fibrillation. the inr is 2.9. there is a petechia on the brain scan. Among the following suggestions, which one(s) do you choose for your therapeutic care?
Immediate administration of prothrombin complex concentrate
Administration of vitamin k in 4 hours
Systematic control brain scan in 6 hours
Stopping the antivitamin K with a change to heparin at a curative dose
Stopping the vitamin K antagonist