Low Aldosterone-to-renin ratio (ARR): what it means
A Aldosterone-to-renin ratio (ARR) result below the normal range is considered low. Here is what a reduced Aldosterone-to-renin ratio (ARR) can point to, and when it is worth discussing with a doctor.
Reference range: cut-off varies by lab and assay units; a high ratio (high aldosterone with suppressed renin) is the standard screen for primary hyperaldosteronism, a treatable cause of high blood pressure
Understand your full resultWhat a low Aldosterone-to-renin ratio (ARR) can mean
- A normal ratio — makes primary hyperaldosteronism unlikely; high blood pressure is then attributed to other causes.
- A low aldosterone with high renin — points away from this diagnosis, and can reflect other conditions.
When to discuss with a doctor
The aldosterone-to-renin ratio is a specialist screen, ordered when primary hyperaldosteronism is a possibility — high blood pressure that is resistant to treatment, starts at a young age, comes with an unexplained low potassium, or is found with an adrenal lump. A high ratio does not by itself confirm the diagnosis: it triggers a confirmatory test and then imaging to sort out whether one gland or both are responsible, which decides between surgery and medication. Because many blood-pressure drugs, salt intake, posture and potassium level change the result, the test is done under controlled conditions and interpreted by a specialist, sometimes after adjusting medicines. Mediora.AI can surface the high-aldosterone, low-renin, low-potassium pattern that suggests this treatable cause of hypertension; confirming it and choosing treatment belong with your endocrinologist.
Conditions this can relate to
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Upload your test - freeMediora.AI is informational - interpretation, not a diagnosis. A single out-of-range value is common and often benign; always discuss decisions with your doctor.