What is the recommended timing for starting anticoagulation after cardioembolic stroke when imaging shows no hemorrhage?

What is the recommended timing for starting anticoagulation after cardioembolic stroke when imaging shows no hemorrhage?

• A. Immediately before imaging
• B. Never start anticoagulation
• C. After hemorrhage is excluded on imaging and risk is acceptable, often around 24 hours or later
• D. Only after 1 week regardless imaging

Answer: (C)

Balancing the risk of early recurrent embolism against the danger of hemorrhagic transformation guides when to start anticoagulation after a cardioembolic stroke. If imaging confirms there is no hemorrhage and the patient is clinically stable, anticoagulation is typically started around 24 hours after onset, sometimes later if the infarct is large or there are other bleeding risks. The essential step is to exclude hemorrhage first, because anticoagulation can worsen an existing bleed. Starting immediately or waiting a full week regardless of imaging doesn’t fit this risk–benefit balance. So the best timing is after imaging shows no hemorrhage and the risk is acceptable, often around 24 hours or later.

Balancing the risk of early recurrent embolism against the danger of hemorrhagic transformation guides when to start anticoagulation after a cardioembolic stroke. If imaging confirms there is no hemorrhage and the patient is clinically stable, anticoagulation is typically started around 24 hours after onset, sometimes later if the infarct is large or there are other bleeding risks. The essential step is to exclude hemorrhage first, because anticoagulation can worsen an existing bleed. Starting immediately or waiting a full week regardless of imaging doesn’t fit this risk–benefit balance. So the best timing is after imaging shows no hemorrhage and the risk is acceptable, often around 24 hours or later.