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FFR guided PCI improved outcome compared with angiography-guided PCI for 2 years of follow-up. However, there are few reports that checked FFR of a left circumflex coronary artery (LCx) one year later after stent implantation which is implanted left main trunk (LMT) to left anterior descending coronary artery (LAD).
This is a single center retrospective study enrolling 20 patients with coronary artery disease. All the patients were implanted with second-generation coronary drug-eluting stent optimally from April 2015 to March 2016. We evaluated FFR after stent implantation, angiography of LCx and outcome of patients, and we reassessed them one year later in the same patients.
Two of 20 patients were performed balloon dilatation of LCx ostium. And all the patients have under 50% of stenosis at LCx ostium when PCI performed, 7 patients have over 50% of stenosis there one year later. FFR of LCx after stent implantation is 0.91 ± 0.05, and FFR of LCx after one year is 0.89 ± 0.05, respectively (P=0.005). There was no patient who caused angina pectoris or acute coronary syndrome by the progression of lesion of LCx.
In the patients that are implanted stents from LMT to LAD, if FFR of LCx is higher than 0.80, it rarely decreases below 0.80 one year later. We can avoid unnecessary stent implantation.