The tests to be done to prevent cerebral infarction include general tests, laboratory tests, imaging tests and other related tests. General examinations include blood pressure and weight, and laboratory examinations include blood routine, blood glucose, blood lipids, clotting time, homocysteine, EA14, anti-cardiolipin antibody, liver and kidney function, etc. Imaging examinations include head CT, MRI, MRA, head and neck CTA, etc. Other related examinations include dynamic ECG, EEG, TCD, etc. All these tests are targeted screening for the causes of cerebral infarction, and can effectively intervene in the high-risk factors of cerebral infarction, such as hypertension, diabetes, hyperlipidemia, hyperhomocysteinemia, atrial fibrillation, stenosis of large arteries in the brain, etc., based on the test results, so as to reduce the risk of developing cerebral infarction.