What question did this study set out to answer?

This research aims to measure plasma catecholamines in patients with hypertension compared to control subjects.

Plasma Catecholamines in Hypertension

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Randomized trial measures plasma catecholamines in hypertension, suggesting abnormal levels in specific conditions.

This research aims to measure plasma catecholamines in patients with hypertension compared to control subjects.
Measured plasma catecholamines using a double-isotope technique
Included 9 control subjects and 20 hypertensive patients
Collected venous blood while subjects rested in supine position.
Total plasma catecholamine concentration in control subjects averaged 0.25 ng/ml
Patients with renal and essential hypertension had normal catecholamine levels
Patients with phaeochromocytoma showed greatly elevated catecholamine levels ranging from 0.48 to 7.90 ng/ml.

Christensen et al. (1972) studied this question.

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