Wallach's Interpretation of Diagnostic Tests: Pathways to Arriving at a Clinical Diagnosis (673 page)

   Differential diagnosis of fluid and electrolyte disorders

   Assessment of adrenal aldosterone production

   Interpretation

Increased In

   Primary aldosteronism

   Secondary aldosteronism

   Barter syndrome

   Pregnancy

   Very low–sodium diet

   Urine aldosterone also increased in nephrosis

Decreased In

   Hyporeninemic hypoaldosteronism (Cushing syndrome)

   CAH

   Congenital deficiency of aldosterone synthetase

   Addison disease

   Very high–sodium diet