The captopril suppression test (CST) is a non-invasive medical test that measures
plasma levels of
aldosterone
Aldosterone is the main mineralocorticoid steroid hormone produced by the zona glomerulosa of the adrenal cortex in the adrenal gland. It is essential for sodium conservation in the kidney, salivary glands, sweat glands, and colon. It plays ...
.
Aldosterone production is suppressed by captopril through the
renin–angiotensin–aldosterone system. CST results are used to assist in the diagnososis of
primary aldosteronism
Primary aldosteronism (PA)'','' also known as primary hyperaldosteronism or Conn's syndrome, refers to the excess production of the hormone aldosterone from the adrenal glands, resulting in low renin levels and high blood pressure. This abnorm ...
(Conn Syndrome).
See also
*
Captopril challenge test - used to diagnose
renal artery stenosis
Renal artery stenosis (RAS) is the narrowing of one or both of the renal arteries, most often caused by atherosclerosis or fibromuscular dysplasia. This narrowing of the renal artery can impede blood flow to the target kidney, resulting in renov ...
References
Blood tests
Dynamic endocrine function tests
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