title: Potential influence of invisible coronary collateral circulation on fractional flow reserve of donor artery in the presence of severe stenosis of receiving artery.
abstract: We reported a case of 78-year-old male who had a severe stenosis in the right coronary artery (RCA) and an intermediate stenosis in the left anterior descending artery (LAD) without visible collateral flow to the RCA on angiogram. Fractional flow reserve (FFR) in the LAD lesion, which revealed significant value as 0.70, increased to 0.78 after revascularization of the RCA lesion. The FFR in an intermediate stenosis should be performed after PCI for severe stenosis in the other coronary arteries. Otherwise, the severity of the stenosis could be overestimated due to the presence of invisible collateral circulation.
authors.affiliation: Cardiovascular Division, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo, 6638501, Japan.
authors.forename: Hiroto
authors.initials: H
authors.lastname: Tamaru
authors.forename: Kenichi
authors.initials: K
authors.lastname: Fujii
authors.forename: Masashi
authors.initials: M
authors.lastname: Fukunaga
authors.forename: Takahiro
authors.initials: T
authors.lastname: Imanaka
authors.forename: Kojiro
authors.initials: K
authors.lastname: Miki
authors.forename: Daizo
authors.initials: D
authors.lastname: Kawasaki
authors.forename: Motomaru
authors.initials: M
authors.lastname: Masutani
authors.forename: Mitsumasa
authors.initials: M
authors.lastname: Ohyanagi
authors.forename: Tohru
authors.initials: T
authors.lastname: Masuyama
mesh_terms: D000368:Aged; D003097:Collateral Circulation / Q000502:physiology*; D017023:Coronary Angiography; D003326:Coronary Circulation / Q000502:physiology*; D023921:Coronary Stenosis / Q000503:physiopathology*; D053805:Fractional Flow Reserve, Myocardial / Q000502:physiology*; D006801:Humans; D008297:Male; D012720:Severity of Illness Index; D015899:Tomography, Emission-Computed, Single-Photon