Table 2

Mean (SD) coronary blood flow velocity parameters and arterial dimensions before, immediately after balloon angioplasty, and at six months’ follow up

Before angioplastyAfter angioplastyFollow up
Dilated coronary artery
 % diameter stenosis77  (11)2-150 29  (13)2-151 37  (22)2-152
 Minimal lumen diameter (mm)0.69 (0.34)2-150 1.98 (0.44)2-151 1.6 (0.65)2-152
 Baseline APV12.8 (5.3)2-150 17.3 (11.1)19.6 (11.2)2-152
 Hyperaemic APV19.9 (12.2)2-150 46.3 (19.3)60.8 (31.4)2-152
 dCFVR1.4 (0.6)2-150 2.9 (1.0)3.2 (0.9)2-152
Normal reference coronary artery
 Baseline APV–19.6 (11.2)18.0 (7.6)
 Hyperaemic APV–61.0 (31.1)57.1 (20.3)
 CFVR–3.2 (0.5)3.3 (0.7)
Relative coronary flow velocity reserve0.49 (0.20)2-150 0.98 (0.29)0.90 (0.24)2-152

  • ↵2-150 p < 0.05, compared to paired values directly after balloon angioplasty;

  • ↵2-151 p < 0.05, compared to paired values at late follow up;

  • ↵2-152 p < 0.05, compared to paired values before balloon angioplasty.

  • APV, average peak flow velocity (cm/s).