Oral Anticoagulation Medication is a type of medicine that helps prevent blood clots from forming in your body. This is important for people with atrial fibrillation, a condition where the heart beats irregularly, which can lead to blood clots. In this trial, the focus is on when to restart this medication after surgery for a condition called chronic subdural hematoma, which is a type of bleeding in the brain. The goal is to find out if starting the medication early or later is better for preventing problems like strokes or further bleeding.

Chronic subdural hematoma – This condition involves the accumulation of blood between the brain’s surface and its outer covering, known as the dura mater. It typically occurs due to minor head injuries, especially in older adults, and can develop over weeks or months. As the blood slowly collects, it can put pressure on the brain, leading to symptoms such as headaches, confusion, and weakness. The progression is gradual, and symptoms may worsen over time if the hematoma enlarges. It can cause changes in mental status, balance issues, and in severe cases, seizures. The condition may require medical intervention to relieve the pressure on the brain.

Atrial fibrillation – This is a common heart rhythm disorder characterized by an irregular and often rapid heartbeat. It occurs when the heart’s upper chambers, the atria, beat out of coordination with the lower chambers, the ventricles. This can lead to symptoms such as palpitations, shortness of breath, and fatigue. The condition can be persistent or intermittent, with episodes that may last from minutes to hours. Over time, atrial fibrillation can lead to complications such as blood clots, which can increase the risk of stroke. The irregular heart rhythm can also affect the heart’s efficiency in pumping blood, potentially leading to heart failure.