Saline-induced Distal to Aortic Coronary Pressure Ratio vs. Resting and Hyperemic Indices of Coronary Artery Stenosis Severity

"Use of a ≥6F guiding catheter and the Verrata pressure guidewire. Administration of intracoronary nitroglycerin.~Verrata normalisation and placement of the Verrata sensor ≥3 vessel-diameter beyond the stenosis.~Whole cycle resting Pd/Pa and resting iFR measurements.~Measurement of contrast FFR: record 5 baseline heart beats, injection of contrast media, 10 ml in the left coronary system, 8 ml in the right coronary system, measure minimal Pd/Pa under stable hyperaemia.~Adenosine FFR: measurement: record 5 baseline heart beats, injection of intracoronary adenosine, 200 mcg in the left coronary system, 100 mcg in the right coronary system, measure minimal Pd/Pa under stable hyperaemia.~Saline-induced Pd/Pa measurement: record 5 baseline heart beats, injection of saline using the ACIST system during 5 heart beats, measure minimal Pd/Pa under stable hyperaemia.~Perform pressure guidewire pullback and check for drift: drift ±0.02 is accepted, if ≥0.03, repeat measurement."