LabMed

Decreased Serum Aldosterone

Differential Diagnosis

Primary hypoaldosteronism

Secondary hypoaldosteronism

Suggested Additional Lab Testing

Primary hypoaldosteronism

  • Serum potassium usually elevated

  • Low serum sodium

  • Normal or elevated plasma renin

Secondary hypoaldosteronism

  • In most cases, elevated serum potassium and low or low-normal serum sodium

  • Low renin production with certain causes of secondary hypoaldosteronism but normal or elevated with other causes

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