Efficacy of fractional flow reserve measurements at side branch vessels treated with the crush stenting technique in true coronary bifurcation lesions

Abstract

BACKGROUND: Measurement of fractional flow reserve (FFR) has been frequently used to optimize the results of coronary stenting in patients with significant narrowing of coronary arteries.

HYPOTHESIS: There has been a consensus that an FFR value > 0.90 after stenting is a useful surrogate for favorable long-term clinical outcome. We evaluated the efficacy of FFR measurement at side branch vessels of true coronary bifurcation lesions that were treated with the crush stenting technique.

METHODS: This study included 12 patients with significant narrowing in both a main coronary vessel and side branch vessel who underwent the crush stenting procedure.

RESULTS: After crush stenting, FFR measurement was performed at the side branch vessel prior to and after kissing balloon angioplasty (KBA). FFR values increased significantly, from 0.94 +/- 0.04 pre-KBA to 0.97 +/- 0.03 post-KBA (P = 0.011). FFR values after crush stenting but prior to KBA already measured > 0.90 in 9 of the 12 patients (75%). FFR values for the remaining 3 patients were 0.88, 0.88, and 0.90, respectively.

CONCLUSIONS: FFR measurement at side branch vessels of coronary bifurcation lesions treated with crush stenting may not contribute to adequate decision-making for improvement of long-term clinical outcomes. KBA should be strongly considered for patients with bifurcation lesions treated with crush stenting.