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A reverse postural test as a screening tool for aldosterone-producing adenoma: a pilot study.
Martin O Weickert1, Beate Schöfl-Siegert, Ayman M Arafat
1Department of Endocrinology, Charité-University Medicine Berlin, Campus Benjamin Franklin, Berlin, Germany.
Endocrine
|April 29, 2009
Summary
A novel reverse postural test (RPT) effectively screens for aldosterone-producing adenoma (APA), a surgically remediable cause of primary hyperaldosteronism (PA). This test differentiates APA from other PA forms, aiding in patient management.
Area of Science:
- Endocrinology
- Cardiovascular Medicine
- Nephrology
Background:
- The aldosterone-to-renin ratio (ARR) is a screening tool for primary hyperaldosteronism (PA).
- A specific test to distinguish aldosterone-producing adenoma (APA) from other PA forms in ambulatory settings is lacking.
- APA is a surgically remediable cause of PA.
Purpose of the Study:
- To evaluate the reverse postural test (RPT) as a novel tool for identifying APA.
- To assess the RPT's ability to differentiate APA from other forms of PA.
Main Methods:
- Investigated healthy controls, primary hypertensive patients, and patients suspicious for PA.
- Measured serum aldosterone after exercise (Aldo-1) and after supine rest (Aldo-2).
- Calculated the ratio Aldo-2/Aldo-1 and performed receiver-operating-curve analysis.
Main Results:
- Aldosterone decreased after rest in controls and hypertensives, but not in APA patients.
- The RPT demonstrated suitability for APA screening.
- A specific ratio and aldosterone level combination identified all APA patients with no false positives.
Conclusions:
- The RPT shows high positive predictive value for identifying APA in outpatients.
- Further validation in larger studies is needed.
- RPT could improve the diagnostic pathway for APA.
