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Table 2 RFR and flow values in the healthy and RAS patients

From: The renal blood flow reserve in healthy humans and patients with atherosclerotic renovascular disease measured by positron emission tomography using [15O]H2O

  N Predilatation   
  Basal flow (ml/min/g) Stress flow (ml/min/g) RFR (%)
Healthy 8 1.8 (0.3) 2.2 (0.6) 22 (32)
RAS unilateral contralateral kidneys 7 1.8 (0.7) 2.1 (0.6) 21 (27)
RAS unilateral, stenosed kidneys 7 1.5 (0.7) 1.7 (0.7) 15 (22)
RAS bilateral 9 1.4 (0.3) 1.7 (0.4) 27 (43)
Diabetics, stenosed kidneys 13 1.3 (0.4) 1.6 (0.5) 24 (41)
Non-diabetics, stenosed kidneys 9 1.6 (0.5) 1.8 (0.5) 14 (20)
  1. Values are expressed as mean (SD)
  2. N number of patients in the subgroups of healthy and bilateral, RAS number of the kidneys in other groups, RFR renal flow reserve, calculated as [(stress blood flow-basal blood flow)/basal blood flow] × 100%