Quantitative coronary angiography
stenosis
STENOSIS
Quantitative coronary angiography analysis will be performed using a quantitative coronary angiographic system (CASS system, Pie Medical Instruments, Maastricht, The Netherlands) before and after stent implantation by individuals blinded to the patients’ treatment assignments. The diameters of the reference vessel (the average of the proximal and distal reference lumen diameters), minimal luminal diameter, and percent diameter stenosis (%) will be measured using the guiding catheter for magnification calibration, before and after stenting from diastolic frames, in a single-matched view showing the smallest minimal luminal diameter. All quantitative angiographic measurements will be obtained within the stented segment and the entire segment, including the stent and its 5-mm edge regions.