the venous concentrations of epinephrine and norepinephrine and changes in ventilation , respiratory gases , circulation and ecg were determined in 20 young healthy male medical students during standardized stepwise ascent to 6000 m in a low pressure chamber , once without ( control ) and once with beta-receptor blockade ( propranolol ) .
C0014563
epinephrine
C0028351
norepinephrine