Question

A 48-year-old man with resistant hypertension (on three agents) and recurrent hypokalaemia (K⁺ 2.9 mmol/L) is evaluated. Plasma aldosterone is elevated with suppressed renin. What is the most appropriate initial screening test for primary hyperaldosteronism?

Accepted Answer

Aldosterone-renin ratio

Answer

Abdominal CT scan

Answer

24-hour urinary catecholamines

Answer

Renal artery Doppler ultrasound

Answer

Plasma cortisol after dexamethasone

Practice question

A 48-year-old man with resistant hypertension (on three agents) and recurrent hypokalaemia (K⁺ 2.9 mmol/L) is evaluated. Plasma aldosterone is elevated with suppressed renin. What is the most appropriate initial screening test for primary hyperaldosteronism?