What additional tests should be performed if high cortisol levels are detected in patients with hypokalemia (low potassium level)?

Updated: Dec 06, 2018
  • Author: Eleanor Lederer, MD, FASN; Chief Editor: Vecihi Batuman, MD, FASN  more...
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A high cortisol level suggests Cushing syndrome. Evaluate for pituitary or adrenal causes. If renin and aldosterone levels are both elevated, this points more strongly to renal artery stenosis. If the index of suspicion is high enough, perform a renal arteriogram and renal vein renin determination to look for significant renal artery stenosis as a cause of hypertension and hypokalemia.

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