aa is arachidonic acid, adp is adenosine diphosphate, both belong to the platelet aggregation agent, inhibition rate are high generally indicates that platelet inhibition effect is obvious. Arachidonic acid and adenosine diphosphate play an important role in the process of platelet aggregation to form thrombus, general patients with coronary heart disease, such as no contraindications, can be applied to antiplatelet drugs to prevent thrombus formation and blockage of blood vessels, such as aspirin, clopidogrel, tegretol and so on. Among them, the point of inhibition of aspirin is arachidonic acid, if the inhibition effect is good, arachidonic acid will be significantly reduced, that is, the inhibition rate is high. Clopidogrel and Tegretol’s point of inhibition is adenosine diphosphate, similarly, a high inhibition rate indicates that the drug is effective. Generally, the test of arachidonic acid and adenosine diphosphate is collectively known as the platelet aggregation test, and if the inhibition rate is obvious, it means that the corresponding antiplatelet drugs have a good inhibitory effect. The results of this test should be evaluated by the doctor according to the patient’s disease condition.