TABLE 3

Absolute Regional Myocardial Blood Flow

RegionStenotic zoneNormal zone
BaselineStenosisPeak arbutamineBaselineStenosisPeak arbutamine
Endocardial0.90 ± 0.070.84 ± 0.070.55 ± 0.06*1.00 ± 0.080.95 ± 0.091.85 ± 0.18†‡
Midmural0.88 ± 0.070.85 ± 0.070.68 ± 0.08*0.96 ± 0.090.93 ± 0.082.11 ± 0.21†‡
Epicardial0.97 ± 0.100.96 ± 0.091.12 ± 0.15*1.07 ± 0.121.01 ± 0.112.54 ± 0.31†‡
Transmural0.92 ± 0.080.88 ± 0.080.78 ± 0.091.00 ± 0.090.96 ± 0.092.22 ± 0.23‡

  • ↵* P < 0.05 vs. stenosis.

  • ↵† P < 0.001 vs. stenosis.

  • ↵‡ P < 0.001 normal vs. stenosis zones.

  • Peak arbutamine: 250 ng/kg/min. Results (mL/min/g) are expressed as mean ± SEM.