User:Drshiji

Resting Full Cycle Ratio (RFR).

Resting Full-Cycle Ratio is a Non Hyperemic index of coronary artery stenosis. Unlike iFR it is not ECG gated or cardiac cycle dependent. RFR is assessed over 4 to 5 cardiac cycles .RFR measures the ratio of the pressure at the point of absolute lowest resting diastolic pressure (Pd) compared to aortic pressure (Pa) during the cardiac cycle.