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Table 1 Measured pressure and distal flow speed in the 3 models of stenosis

From: The reasons why fractional flow reserve and instantaneous wave-free ratio are similar using wave separation analysis

Stenosis (%) Pstatic (mmHg) Case 1 Case 2 Case3
Basal condition Forward flow condition Wedge condition
Observed indices Calculated indices Observed indices
Pa (mmHg) Pd (mmHg) Distal flow (cm/s) Pfor (mmHg) Pback (mmHg) Pa (mmHg) Pd (mmHg) Distal flow (cm/s) Pwedge (mmHg)
48 10 20.2 18.2 13.98 10.9 7.3 23.27 18.83 29.9 19.7
48 30 40.6 40.4 16.40 27.8 12.6 44.50 40.29 31.9 40.1
71 10 21.7 19.3 23.53 11.3 7.0 25.30 16.14 37.7 15.0
71 30 43.1 41.2 24.76 29.3 12.0 46.64 41.26 37.7 40.1
88 10 36.6 18.5 29.46 11.8 6.7 44.62 20.51 35.4 19.3
88 30 57.0 38.4 30.92 29.0 9.5 64.05 38.45 37.4 38.4
  1. Pa, coronary aortic pressure; Pd, coronary distal pressure; Pback, backward pressure; Pfor, forward pressure; Pstatic, hydro static pressure; Pwedge, coronary wedge pressure