Abstract
The high prevalence of primary aldosteronism among hypertensives justifies large scale
screening by the aldosterone-renin ratio; however, this test is subject to several
variables responsible for false-positive results. Functional tests to confirm autonomous
aldosterone secretion are commonly used, with the fludrocortisone suppression test
considered the gold standard, and saline infusion or captopril challenge, the most
practical. However, each of these tests has sub-optimal sensitivity and specificity
and none has been so far prospectively validated by comparing the results with the
lateralization by adrenal vein sampling and the results of surgery. Their role in
confirming the diagnosis of primary aldosteronism due to unilateral adenoma remains
incompletely resolved.
Key words
aldosterone - renin-angiotensin-aldosterone system (RAAS) - hypertension