Clinical implications of guiding catheter extubation during fractional flow reserve measurements.

Background: Fractional flow reserve (FFR) is defined by the maximal coronary flow ratio with and without stenosis.

Aims: We hypothesized that guiding catheter intubation in coronary ostia during FFR measurements may underestimate FFR value by limiting the increase of coronary flow during maximal hyperaemia.

Methods: Between June 2013 and January 2014, we prospectively included all patients with i.

Pressure wire versus microcatheter for FFR measurement: a head-to-head comparison.

Aims: Recently developed microcatheters can be used instead of a pressure wire for fractional flow reserve (FFR) measurement. We sought to assess the haemodynamic and clinical impact of using a larger profile device to measure FFR.

Methods And Results: Our prospective registry included 77 consecutive patients who underwent invasive FFR measurement of intermediate coronary stenoses between June 2015 and July 2016.