Cerebral infarction after cardiac bypass surgery should be treated aggressively by requesting neurology consultation or referral. Cardiac bypass surgery, also known as coronary artery bypass grafting, is a procedure to artificially create a vascular pathway in the coronary arteries due to blockage of atherosclerotic plaques or hemodynamic abnormalities that result in a lack of blood flow, so that the blood flow can be opened up. Cerebral infarction, on the other hand, is a critical neurological condition that is caused by cerebral thrombosis such as atherosclerotic plaque, cerebral embolism such as cardiac embolus, hemodynamic abnormality such as hypercoagulability due to hematological disorders, and arterial blood stealing that results in the permanent death of brain cells due to ischemia and anoxia and causes a series of neurological damage symptoms. Cerebral infarction may be caused by insufficient perfusion of cerebral blood vessels, aggravated by arterial steal after cardiac bypass surgery, resulting in insufficient perfusion of intracranial arteries, or inadvertent dislodgement of an embolus that embolizes an intracranial artery during the surgery. Once cerebral infarction occurs, it should be referred to a professional neurologist for consultation and treatment urgently, so as not to aggravate the condition with delay and jeopardize the life of the patient.