Normal Reference Ranges
Adult
< 20 (Ratio varies by assay and units) Ratio
Pediatric
N/A Ratio
Clinical Significance
Screening test of choice for primary aldosteronism in patients with hypertension and hypokalemia. Elevated ratio (> 20-30) warrants confirmatory testing.
Causes of High
- Primary Aldosteronism (Conn's Syndrome)
- Bilateral adrenal hyperplasia
Causes of Low
- Essential hypertension
- Secondary hyperaldosteronism (renal artery stenosis)