these studies were undertaken to clarify the role of the central and peripheral sympathetic nervous system and the renin-aldosterone system on the onset and maintenance of high blood pressure in essential hypertension ( eh ) , and the following examinations were performed : 1 ) urinary free norepinephrine and epinephrine excretion ( unef and uef ) , urinary conjugated norepinephrine and epinephrine excretion ( uneconj and ueconj ) , plasma norepinephrine and epinephrine concentration ( pne and pe ) , plasma renin activity ( pra ) and plasma aldosterone concentration ( pac ) were measured in 52 patients with eh , who were divided into two groups ( borderline eh : b-eh , and sustained eh : s-eh ) , and fifteen normals ( n ) .
C0028351
norepinephrine
C0014563
epinephrine