epidural anesthesia induced significant ( p less than 0.05 ) decreases from control values in mean arterial pressure and plasma norepinephrine ( from 85 +/- 6 to 67 +/- 8 mmhg and from 600 +/- 108 to 307 +/- 77 pg/ml , respectively , mean +/- sem ) without significant changes in heart rate , plasma epinephrine , renin activity , and vasopressin .
C0028351
norepinephrine
C0014563
epinephrine