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Is primary aldosteronism underdiagnosed in clinical practice?
B Fiquet-Kempf1, P Launay-Mignot, G Bobrie
1Hypertension Unit and Department of Genetics, Hôpital Européen Georges Pompidou, Paris, France.
Clinical and Experimental Pharmacology & Physiology
|March 21, 2002
Summary
Primary aldosteronism diagnosis involves checking aldosterone and renin levels. While screening tests like the aldosterone-to-renin ratio are useful, they don't confirm surgically correctable forms of the condition.
Area of Science:
- Endocrinology
- Cardiovascular Medicine
- Nephrology
Background:
- Primary aldosteronism is characterized by hypertension, suppressed renin, and high aldosterone.
- Accurate diagnosis is crucial as only Conn's adenoma is surgically treatable.
- Resistant hypertension and hypokalemia warrant screening for primary aldosteronism.
Purpose of the Study:
- To evaluate diagnostic methods for primary aldosteronism.
- To assess the utility of screening tests like the aldosterone-to-renin ratio.
- To differentiate between idiopathic hyperplasia and Conn's adenoma.
Main Methods:
- Hormonal testing including plasma aldosterone and renin levels.
- Calculation of the aldosterone-to-renin ratio as an initial screening test.
- Computed tomography and adrenal vein sampling for subtype differentiation.
Main Results:
- The aldosterone-to-renin ratio demonstrates renin-aldosterone dissociation.
- Computed tomography and adrenal vein sampling aid in distinguishing hyperplasia from adenoma.
- Overlapping hormonal values exist between primary aldosteronism subtypes, making precise prevalence definition challenging.
Conclusions:
- Sensitive screening tests increase diagnosed primary aldosteronism cases but not surgically correctable ones.
- There is no definitive evidence of primary aldosteronism being underdiagnosed.
- Further research is needed for tests predicting surgical outcomes in Conn's adenoma patients.