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Comparative Study
English Abstract
Journal Article
[Determination of plasma catecholamine. Effects of glucagon administration].
Basal plasma dopamine (DA), Norépinephrine (NE) and Epinephrine (E) were determined in controls (n = 15) essential hypertension (n = 19) and Pheochromocytoma (n = 9). Plasma NE was significantly higher in essential hypertension than in control and in 5 cases, plasma NE or E was 3 SD above mean control values. In 8/9 pheochromocytomas DA, E or NE were significantly elevated. In 1 case, catecholamine levels were within normal range during normotensive period. When a provocative glucagon test (1 mg I.V) was performed in controls, there was no change in blood pressure DA and NE levels, but a significant increase in plasma E 2.5 and 5 min. after injection. Similar results were obtained in 8/10 cases of labile hypertension. However in 2 cases plasma NE or E increased significantly without elevation in blood pressure. In 3/4 pheochromocytomas under normotensive phase, blood pressure and plasma catecholamines increased significantly; however in 1 case, no change was observed.
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