This report describes a new specific colorimetric procedure for uric acid assay with AutoAnalyzer II and SMA (Technicon) systems, made specific by the application of uricase. Hydrogen preroxide, formed in this reaction, effects the oxidative coupling of 4-aminophenazone and 2,4-dichlorophenol under the catalytic influence of peroxidase. The red dye formed is measured at 505 or 520 nm. A sample ...

One hundred patients whose hypertension was originally well controlled were carefully screened when a routine clinic visit showed that their blood pressure was above 170/100 mm Hg. Simple misconceptions accounted for 75 failures: 38 did not know they had to continue their drugs, 14 thought they should not take antihypertensive drugs if they had not had a meal, 13 did not know which drugs contro...

a-Methyldopa acts through a metabolite in the central nervous system. Of the three metabolites most prominently considered as potential mediators of a-methyldopa hypotension — amethyldopamine, a-methylnorepinephrine (MNE), and a-methylepinephrine (ME) — ME is the most potent depressor agent following intravenous infusion into rats, following injection into the lateral ventricle, and following i...

The hypotensive action of methyldopa has been linked to production of the metabolites methyldopamine and methylnorepinephrine in brain. We have studied the effect of long-term (72 hour) intravenous infusions of methyldopa to awake restrained spontaneously hypertensive rats and normotensive Wistar-Kyoto control animals to look for differences in hypotensive effect, differences in concentrations ...

From the Hypertension Section, Department of Internal Medicine, University of Michigan Medical Center, Ann Arbor, Mich. This study was assisted by U. S. Public Health Service Grant 5MOl-FR-42 to the Clinical Research Unit, University of Michigan Medical Center, which enabled hospitalization of patients included in the study. Manuscript received December 14, 1970, accepted February 12, 1970. Add...