When is initiating anticoagulation typically considered after cardioembolic stroke?

When is initiating anticoagulation typically considered after cardioembolic stroke?

• A. After hemorrhage is excluded on imaging and risk of hemorrhagic transformation is acceptable, often 24 hours or later per imaging status
• B. Immediately prior to imaging
• C. Only after 7 days regardless imaging
• D. Never use anticoagulation after cardioembolic stroke

Answer: (A)

The main idea is timing anticoagulation to balance preventing another embolic event with the risk of bleeding into the brain. After a cardioembolic stroke, you start anticoagulation only once brain imaging shows there is no hemorrhage and the infarct isn’t at high risk for hemorrhagic transformation. When imaging confirms this, the common practice is to begin around 24 hours after onset, with the exact moment tailored to what the imaging shows—the absence of bleeding and the infarct’s evolution. Starting before imaging isn’t safe, and delaying for a rigid fixed period for all patients isn’t appropriate; never using anticoagulation ignores the goal of preventing recurrent emboli in many cardioembolic strokes.

The main idea is timing anticoagulation to balance preventing another embolic event with the risk of bleeding into the brain. After a cardioembolic stroke, you start anticoagulation only once brain imaging shows there is no hemorrhage and the infarct isn’t at high risk for hemorrhagic transformation. When imaging confirms this, the common practice is to begin around 24 hours after onset, with the exact moment tailored to what the imaging shows—the absence of bleeding and the infarct’s evolution. Starting before imaging isn’t safe, and delaying for a rigid fixed period for all patients isn’t appropriate; never using anticoagulation ignores the goal of preventing recurrent emboli in many cardioembolic strokes.