Fractional Flow Reserve Versus Angiography for Guiding Selective Percutaneous Coronary Intervention in ST-segment Elevation Myocardial Infarction

The investigators retrospectively collect STEMI patients received selective PCI from Jan 2012 to Dec 2015. Clinical follow-up is performed from the date of FFR assessment to Dec 2016 or death, which is up to 5 years. The primary endpoint is major adverse cardiac events, composite of cardiac death, reinfarction and unplanned hospitalization due to cardiovascular reasons. The primary endpoints are cardiac death, reinfarction and unplanned hospitalization due to cardiovascular reasons. All deaths are considered cardiovascular unless an unequivocal noncardiac cause could be established. Reinfarction is defined as myocardial infarction after the PCI procedure. Unplanned hospitalization will be present only if the patient is hospitalized unexpectedly because of persisting or increasing complaints of angina, ventricular arrhythmias and heart failure. All patients were received FFR-guided PCI or angiography-guided PCI before enrollment, and the investigators do not assign specific interventions to the subjects during the study. So this study might be considered to be observational.