ET-1 levels were significantly higher in CABG group in all vascular compartments : ART-T2 ( 1.83 1.81 vs. 0.17 0.16 fmol/mL , p = 0.02 ) , ART-T4 ( 0.99 0.56 vs. 0.24 0.12 fmol/mL , p = 0.01 ) , SG-T1 ( 0.59 0.15 vs. 0.25 0.13 fmol/mL , p = 0.01 ) , SG-T2 ( 2.70 2.75 vs. 0.30 0.24 fmol/mL , p = 0.004 ) , SG-T3 ( 1.56 0.28 vs. 0.35 0.31 fmol/mL , p < 0.001 ) , SG-T4 ( 1.34 0.11 vs. 0.34 0.16 fmol/mL , p < 0.001 ) , and CS-T2 ( 1.12 0.49 vs. 0.12 0.12 fmol/mL , p = 0.004 ) .