the Effect of Prolonged Inflation Time During Stents Deployment for ST-elevation Myocardial Infarction

the Effect of Prolonged Inflation Time During Drug-eluting Stents Deployment Compared With Conventional Method for ST-elevation Myocardial Infarction

The purpose of this study is to determine whether prolonged inflation time on drug-eluting stents deployment for ST-elevation myocardial Infarction was better than conventional stents deployment.

Inclusion Criteria:

• men and women ≥18 years with ST-elevation Myocardial Infarction;
• patients with STEMI and ischemic symptoms of less than 12 hours'duration;
• patients with STEMI and ischemic symptoms of less than 12 hours' duration who have contraindications to fibrinolytic therapy, irrespective of the time delay from FMC;
• patients with STEMI if there is clinical and/or ECG evidence of ongoing ischemia between 12 and 24 hours after symptom onset;
• when angiography was completed, guide wire could cross the lesion in the culprit vessel, TIMI≥1，with feasibility to direct stenting

Exclusion Criteria:

• cardiac shock, or acute severe heart failure;
• the lesion was highly calcified, excessive proximal tortuosity,left main artery lesion, restenosis lesion,vein graft lesion,total occlusions;
• True bifurcation lesions;
• Stenosis≤50% and TIMI flow grade 3;
• history of PCI in target vessel;
• diameter of the target vessel less than 2 mm;
• severe liver and kidney dysfunction;
• inability to give informed written consent.