title: Decrease of fractional flow reserve shortly after percutaneous coronary intervention.
abstract: BACKGROUND
  The aim of the present study was to quantitatively assess the physiological acute recoil after percutaneous coronary intervention (PCI), and to determine the relation between it and target lesion revascularization (TLR) in the chronic phase.
  
  
  RESULTS
  This study evaluated 76 patients who underwent elective PCI between May 1997 and December 2001: plain old balloon angioplasty (POBA) in 50 patients and bare metal stent implantation in 26 patients. Fractional flow reserve (FFR) was measured immediately (FFR0m) and 15 min (FFR15m) after the final dilation, and the difference (dif-FFR) was calculated. In POBA patients with TLR, FFR15m was significantly low (0.79+/-0.05 vs 0.87 +/-0.08, p<0.001) and dif-FFR was significantly high (0.06+/-0.04 vs -0.01+/-0.04, p<0.001) compared with the patients without TLR. The patients with a larger dif-FFR value (> or =0.05) had a higher rate of TLR (92%). Dif-FFR was the strongest independent predictor of TLR.
  
  
  CONCLUSIONS
  The changes in FFR during the time course shortly after coronary intervention can be detected and a decrease in the first 15 min after PCI is associated with a higher rate of TLR.
authors.affiliation: Department of Internal Medicine, Division of Cardiology, Tokyo Medical University, Nishi-Shinjuku, Tokyo, Japan.
authors.forename: Nobuhiro
authors.initials: N
authors.lastname: Tanaka
authors.forename: Kenji
authors.initials: K
authors.lastname: Takazawa
authors.forename: Naohisa
authors.initials: N
authors.lastname: Shindo
authors.forename: Hideyuki
authors.initials: H
authors.lastname: Kobayashi
authors.forename: Tomohiko
authors.initials: T
authors.lastname: Teramoto
authors.forename: Jun
authors.initials: J
authors.lastname: Yamashita
authors.forename: Akira
authors.initials: A
authors.lastname: Yamashina
mesh_terms: D000368:Aged; D015906:Angioplasty, Balloon, Coronary; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009204:Myocardial Revascularization; D011237:Predictive Value of Tests; D012372:ROC Curve; D012039:Regional Blood Flow; D015607:Stents; D016896:Treatment Outcome