Definitions
stenosis
STENOSIS
STEMI was defined according to the fourth universal definition of myocardial infarctionSuccessful PCI was defined as the implantation of a second-generation drug-eluting stent to the target lesions, resulting in visual reduction of the lesion to less than 20% stenosis, and restoration of coronary blood flow equivalent to both TIMI 2 and TIMI 3 Flow levels. Normal values for FFR, CFR, and IMR were defined as > 0.80, ≥ 2.0, and < 25 U, respectively