TABLE 4

β-Adrenergic Receptor Density

PumpsRight ventricleLeft ventricle
Bmax (fmol/mg protein)Kd (nmol/L)Bmax (fmol/mg protein)Kd (nmol/L)
Saline (n = 6)27.4 ± 3.581.07 ± 0.06337.6 ± 1.521.20 ± 0.19
NE (n = 6)17.6 ± 2.97*0.92 ± 0.0625.8 ± 2.77†1.30 ± 0.21

  • ↵* P < 0.001.

  • ↵† P < 0.0001.

  • Bmax = receptor density; Kd = receptor affinity constant.