LabMed
Increased Serum Aldosterone
Differential Diagnosis
Primary hyperaldosteronism
Secondary hyperaldosteronism
Suggested Additional Lab Testing
Primary hyperaldosteronism
Serum potassium is usually low, but a low-sodium diet may result in a normal value.
Serum sodium is mildly elevated in most cases.
Plasma renin activity is low for most cases of hyperaldosteronism.
The low value for plasma renin makes the ratio of serum aldosterone to plasma renin very elevated in primary hyperaldosteronism.
Secondary hyperaldosteronism
Serum potassium is usually low, but a low-sodium diet may result in a normal value.
Normal to mildly elevated serum sodium
Plasma renin activity is elevated when there is decreased perfusion of the kidneys, a common cause of secondary hyperaldosteronism
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