After 24 hours of onset, the hemodynamics are stable and interventional therapy at this time is not only not beneficial but harmful. Remedial interventions: For patients who do not pass thrombolysis, timely interventions are called remedial interventions. The choice of interventional treatment for thrombolysis recanalization: Thrombolysis to open the IRA up to Thrombolysis in Myocardial Infarction clinical trial (TIMI) level 2-3 flow is considered successful. When coronary angiography shows that thrombolysis does not reach TIMI level 3 flow, not only is there a high chance of re-thrombosis to occlude the vessel, but also the incidence of post-infarction angina is extremely high, so immediate remedial intervention is needed. For TIMI grade 3 flow treated with thrombolysis, intervention is not recommended in principle, regardless of the degree of stenosis in the IRA (infarct-related artery). Delayed intervention, it is generally accepted that delayed intervention should be performed after 1 week of AMI onset, and delayed intervention within 1 week of onset is not recommended.