Hi, I had gone through your question and understand your concerns. Blood clot in brain can be a serious condition, it may result in heavy damage of health and function, even in some cases death. Before surgery were stopped antiagregant drugs ( anti clot drugs) to reduce the risk of hemorrhage. The clot has its origin in your uncle's heart. Treatment first 3 to 6 hours is mechanical trombectomy or trombolysis. After first hours if this treatment has not be done, further treatment is difficult and consists on anticlotting drugs ( to prevent further clotting), brain protective drugs, physiotherapy (reabilitation). Hope this answers your question. If you have additional questions or follow up questions then please do not hesitate in writing to us. I will be happy to answer your questions.