Table 2.

Plasma epinephrine/norepinephrine concentrations during the epinephrine infusion trial.

Epinephrine day	Gly/Gly	Arg/Arg	P value
Plasma epinephrine concentration (pg/mL)5
Basal	34 ± 5	26 ± 3	0.33
Epi #1	108 ± 7	103 ± 7	0.65
Resting	33 ± 4	24 ± 4	0.39
Epi #2	543 ± 39	504 ± 37	0.91
Plasma norepinephrine concentration (pg/mL)*
Basal	142 ± 16	128 ± 16	0.73
Epi #1	148 ± 10	153 ± 12	0.47
Resting	140 ± 14	135 ± 14	0.92
Epi #2	205 ± 21	189 ± 12	0.59

Values are mean ± SEM. Epi #1, epinephrine infusion at rate of 5 ng kg⁻¹ min⁻¹; Epi #2, epinephrine infusion at rate of 40 ng kg⁻¹ min⁻¹. There were no significant differences between Gly/Gly and Arg/Arg subjects.

^*n =14 in Gly/Gly and n =15 in Arg/Arg groups.