Platform
Company
Endocrine & Reproductive
Review status
Currently under review
Pending specialist review and validation.
Aldosterone Ambulatory is a blood test that measures aldosterone, a hormone made by your adrenal glands that helps regulate salt and water balance, blood pressure, and potassium levels.
Ambulatory means the sample is collected after you have been up and moving rather than lying down. Because posture and activity change aldosterone release, this collection condition helps your clinician interpret the hormone in a way that reflects everyday physiology.
This test helps evaluate causes of high blood pressure that is hard to control, especially when low potassium or an adrenal issue is suspected. It is often ordered together with a renin test to assess how the renin angiotensin aldosterone system is functioning and to screen for primary aldosteronism.
It can also support the evaluation of possible adrenal insufficiency or certain inherited conditions that affect salt balance. The risks are those of a routine blood draw, such as brief discomfort or bruising, while the potential benefits include more precise diagnosis and treatment that can improve blood pressure, potassium balance, and long term cardiovascular health.
Your result is interpreted alongside your posture at collection, sodium intake, medications, kidney function, and a renin measurement. A higher aldosterone while you are upright may point toward autonomous production, while a lower value can occur with adrenal insufficiency or with medicines that suppress this hormone. Because many factors influence aldosterone, one result by itself rarely provides a final diagnosis.
If results do not match your symptoms, your clinician may adjust medicines and sodium intake and repeat the test, order an aldosterone to renin ratio, or arrange confirmatory stimulation or suppression testing. Next steps can include checking potassium and acid base status, imaging of the adrenal glands when indicated, and referral to a specialist to tailor therapy.
Reference intervals vary by laboratory, analyzer, methodology, population, and units. The ranges shown here are for education only. Always interpret your results against the reference interval printed on your own lab report.
Aldosterone rises when you are upright and varies across the day. Follow instructions about being up and active before the blood draw so the result is interpreted correctly.
High sodium intake tends to suppress aldosterone, while low sodium or dehydration can increase it. Follow any diet and fluid guidance given before testing.
Mineralocorticoid antagonists, diuretics, ACE inhibitors, ARBs, beta blockers, oral contraceptives, glucocorticoids, licorice, and some herbal products can alter levels. Tell your clinician about all medicines and supplements.
Abnormal potassium changes aldosterone secretion and can distort interpretation. Your provider may correct significant potassium abnormalities before testing.
Chronic kidney disease or reduced kidney blood flow can shift renin and aldosterone. Additional tests may be used to account for kidney effects.
Pregnancy and estrogen containing therapies can increase aldosterone and renin through binding protein and volume changes. Interpretation may differ in these settings.
Acute illness, pain, psychological stress, and strenuous exercise can affect the renin angiotensin aldosterone system. Testing when you are stable is preferred when possible.
Prolonged tourniquet time, wrong collection tubes, or processing delays can impact measured levels. Laboratories use specific protocols to minimize preanalytic errors.
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