Comparison of adenosine-independent pressure indices to fractional flow reserve in stent-jailed bifurcation side branches.

Objectives And Background: This study aims to evaluate whether the high correlation and classification agreement of the instantaneous wave-free ratio (iFR) and the resting distal coronary to aortic pressure ratio (P /P ) with the fractional flow reserve (FFR) can be confirmed in stent-jailed side branches (J-SB).

Methods: Consecutive patients (n = 49) undergoing provisional stenting were prospectively enrolled and a physiological assessment of the J-SB (n = 51) was performed. FFR, iFR, and P /P were measured and the hemodynamic relevance was determined using cutoff values of ≤0.