The optimal timing for delayed percutaneous coronary intervention in patients with ST-segment elevation myocardial infarction presenting beyond 12 hours after symptoms onset

Objective To evaluate the impact of the timing of delayed PCI on the outcomes of patients with STEMI missing out on early reperfusion therapy within 12 h after symptom onset and ascertain the eligible time window to perform delayed PCI.Methods Among 28,061 patients registered in China Acute Myocardial Infarction(CAMI)registry,a total of 3,048 stable patients with STEMI who did not underwent any early reperfusion therapy within 12 hours after symptom onset and received delayed PCI at recovery stage were finally enrolled.