Japanese Circulation Society

IS147: Coronary Pressure Measurement and Fractional Flow Reserve
Nico H.J. Pijls, M.D., Ph.D.

Figure 6. Fractional flow reserve is independent of changes in blood pressure and heart rate. Coronary flow reserve will change, although the stenosis does not change (left panel). Heart rate activity increases do not affect this ratio (right panel). Pijls 2000.