almost all comparative studies of plasma catecholamines in patients with essential hypertension ( eh ) and in normotensive controls have reported higher mean norepinephrine ( ne ) or epinephrine ( e ) levels in the hypertensive patients , but only about 40 % of the studies have been positive , i.e. , have reported statistically significant hypertensive-normotensive ( h-n ) differences .
C0028351
norepinephrine
C0014563
epinephrine