Captopril suppression test

Captopril suppression test
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).

• Captopril challenge test – used to diagnose renal artery stenosis

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