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