Etiology |
Plasma renin activity |
Serum aldosterone |
Serum cortisol |
Hyporeninemic hypoaldosteronism |
↓ |
↓ |
Normal |
Primary adrenal insufficiency |
↑ |
↓ |
↓ |
Adrenal enzyme deficiency |
↑ |
↓ |
Normal or ↓ |
↑, increased; ↓, decreased. |