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Primary Aldosteronism.

Keith B Quencer1, J B Rugge1, Olga Senashova1

  • 1Oregon Health and Science University, Portland, Oregon.

American Family Physician
|September 19, 2023
PubMed
Summary
This summary is machine-generated.

Primary aldosteronism, a common cause of hypertension, is underdiagnosed. Early case detection using the aldosterone-renin ratio and confirmatory tests is crucial for timely treatment and improved patient outcomes.

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Area of Science:

  • Endocrinology
  • Cardiovascular Medicine
  • Hypertension Research

Background:

  • Primary aldosteronism (PA) is a significant cause of hypertension, affecting ~6% of primary care patients and more in resistant cases.
  • Despite risk factors, only ~2% of patients with PA are formally diagnosed, indicating a substantial diagnostic gap.
  • Identifying PA is critical due to its association with increased cardiovascular risk.

Purpose of the Study:

  • To outline the diagnostic pathway for primary aldosteronism.
  • To emphasize the importance of case detection in at-risk populations.
  • To detail confirmatory testing and subsequent management strategies.

Main Methods:

  • Case detection involves assessing patients with resistant hypertension, controlled hypertension with risk factors (e.g., hypokalemia, adrenal nodule, family history), and measuring plasma aldosterone concentration and plasma renin activity.
  • An elevated aldosterone-renin ratio (>30) suggests aldosteronism.
  • Confirmatory tests include captopril challenge, salt loading, or fludrocortisone suppression tests.

Main Results:

  • A positive aldosterone-renin ratio indicates independent aldosterone secretion.
  • Sustained high aldosterone levels post-suppression/loading confirm PA.
  • Further imaging (adrenal CT) and adrenal vein sampling differentiate unilateral from bilateral disease.

Conclusions:

  • Prompt diagnosis of primary aldosteronism is essential for effective hypertension management.
  • Unilateral PA is treated with adrenalectomy.
  • Bilateral PA requires medical management with mineralocorticoid receptor antagonists.