Valid evaluation of plasma catecholamines.
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چکیده
منابع مشابه
Evaluation of a radioenzymic kit for determination of plasma catecholamines.
We evaluated a commercially available reagent test-kit (Upjohn) for simultaneously determining norepinephrine, epinephrine, and dopamine in 50-microL of plasma. The three catecholamines are enzymically converted into the radioactive O-methyl derivatives and separated by thin-layer chromatography. Day-to-day precision (CV) was 11, 10, and 14% for norepinephrine, epinephrine, and dopamine, respec...
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Of 78 comparative studies of plasma catecholamines in patients with essential hypertension and in normotensive controls, most reported higher catecholamine levels in the hypertensives, although only about 40% of the studies were positive (reporting statistically significant hypertensivenormotensive differences). Although there was dramatic variability in catecholamine values within and across s...
متن کاملPlasma catecholamines and chronic congestive heart failure.
Heart Failure To the Editor: We read with great interest the paper by Swedberg et al.1 With respect to it, we will supply additional information that might aid in the understanding of the failure of imidazoline’s agonists to improve chronic congestive heart failure (CCHF) in patients. We have assessed all plasma neurotransmitters in some 30 000 normal and diseased subjects. Included were noradr...
متن کاملModified fluorometric method for determining plasma catecholamines.
Plasma catecholamines were fluorometrically determined by a modification of the standard alumina-trihydroxyindole method in which radioactive tracer catecholamines are used to follow the chromatographic behavior of the endogenous catecholamines on alumina. This modification permits appropriate fluorometry of that portion of the eluate with the highest concentration of catecholamines, because in...
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ژورنال
عنوان ژورنال: Thorax
سال: 1981
ISSN: 0040-6376
DOI: 10.1136/thx.36.11.880-a