Captopril suppression test | |
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![]() Aldosterone (chemical structure) is measured in the CST. | |
Purpose | measures plasma levels of aldosterone. |
The captopril suppression test (CST) is a non-invasive medical test that measures plasma levels of aldosterone.[1] Aldosterone production is suppressed by captopril through the renin–angiotensin–aldosterone system. CST results are used to assist in the diagnososis of primary aldosteronism (Conn syndrome).