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Related Experiment Video

Updated: Jan 27, 2026

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Seated Saline Suppression Test for Lateralizing Primary Aldosteronism.

Alexander A Leung1,2, Raj S Padwal3, Gregory L Hundemer4

  • 1Division of Endocrinology and Metabolism, Department of Medicine (A.A.L., E.V., D.J.T.C., D.M.R., G.A.K.), University of Calgary, Alberta, Canada.

Hypertension (Dallas, Tex. : 1979)
|January 26, 2026
PubMed
Summary
This summary is machine-generated.

The seated saline suppression test (SSST) for primary aldosteronism (PA) shows limited accuracy in identifying lateralizing PA, potentially misinforming treatment decisions.

Keywords:
adrenal vein samplinglateralizationlateralizingsaline infusion testsaline suppression testsensitivityspecificity

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Area of Science:

  • Endocrinology
  • Nephrology
  • Clinical Trials

Background:

  • Confirmatory testing for primary aldosteronism (PA) has uncertain diagnostic value.
  • High-risk PA patients require reliable methods to confirm lateralization.

Purpose of the Study:

  • To evaluate the diagnostic accuracy of the seated saline suppression test (SSST) for identifying lateralizing PA.
  • To compare SSST performance with adrenal vein sampling (AVS) as the gold standard.

Main Methods:

  • A blinded clinical trial involving 160 high-risk PA patients undergoing SSST and AVS.
  • Lateralization defined by AVS aldosterone/cortisol ratio ≥3:1.
  • Primary outcome: diagnostic accuracy of SSST using various aldosterone cutoffs.

Main Results:

  • Overall diagnostic accuracy of SSST ranged from 64.4% to 67.5% depending on the aldosterone cutoff.
  • Positive SSST results were equivocal or minimally informative (likelihood ratios 1.1-1.9).
  • Negative SSST results modestly ruled against lateralization (likelihood ratios 0.3-0.5).

Conclusions:

  • Aldosterone suppression testing, including SSST, is unreliable for predicting AVS outcomes.
  • The SSST may lead to misinformed diagnostic and treatment decisions in PA management.