1. Plasma dopamine β-hydroxylase (DβH) amounts were measured by radioimmunoassay in twenty-eight patients, twenty of whom had essential hypertension. There was a positive correlation between resting diastolic blood pressure and plasma DβH concentration.
2. Plasma DβH amounts also correlated significantly with those of plasma noradrenaline (NA) in individual patients.
3. These findings provide further support for the conclusions drawn from studies of plasma catecholamines that the sympathetic nervous system contributes toward the maintenance of the elevated blood pressure in essential hypertension.
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© 1973 The Biochemical Society and the Medical Research Society
1973
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